Refactor to use default trait in tests

42 files changed, 429 insertions, 543 deletions

diff --git a/tests/attention.rs b/tests/attention.rs
index 1eef10d..d79432d 100644
--- a/tests/attention.rs
+++ b/tests/attention.rs
@@ -13,9 +13,9 @@ fn attention() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     // Rule 1.
@@ -827,11 +827,11 @@ fn attention() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         attention: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>*a*</p>",
@@ -839,7 +839,7 @@ fn attention() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("a *alpha* b **bravo** c.", &ParseOptions::default())?,
+        to_mdast("a *alpha* b **bravo** c.", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![
diff --git a/tests/autolink.rs b/tests/autolink.rs
index 1b20e08..64f94e9 100644
--- a/tests/autolink.rs
+++ b/tests/autolink.rs
@@ -13,9 +13,9 @@ fn autolink() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -259,11 +259,11 @@ fn autolink() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         autolink: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>&lt;a@b.co&gt;</p>",
@@ -273,7 +273,7 @@ fn autolink() -> Result<(), String> {
     assert_eq!(
         to_mdast(
             "a <https://alpha.com> b <bravo@charlie.com> c.",
-            &ParseOptions::default()
+            &Default::default()
         )?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
diff --git a/tests/block_quote.rs b/tests/block_quote.rs
index 970b82e..5d765e8 100644
--- a/tests/block_quote.rs
+++ b/tests/block_quote.rs
@@ -208,11 +208,11 @@ fn block_quote() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         block_quote: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>&gt; # a\n&gt; b\n&gt; c</p>",
@@ -220,7 +220,7 @@ fn block_quote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("> a", &ParseOptions::default())?,
+        to_mdast("> a", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::BlockQuote(BlockQuote {
                 children: vec![Node::Paragraph(Paragraph {
diff --git a/tests/character_escape.rs b/tests/character_escape.rs
index 0546269..41cc68d 100644
--- a/tests/character_escape.rs
+++ b/tests/character_escape.rs
@@ -13,9 +13,9 @@ fn character_escape() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -93,11 +93,11 @@ fn character_escape() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         character_escape: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>\\&gt; a</p>",
@@ -105,7 +105,7 @@ fn character_escape() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("a \\* b", &ParseOptions::default())?,
+        to_mdast("a \\* b", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![Node::Text(Text {
diff --git a/tests/character_reference.rs b/tests/character_reference.rs
index 0d72fff..ab253c4 100644
--- a/tests/character_reference.rs
+++ b/tests/character_reference.rs
@@ -55,9 +55,9 @@ fn character_reference() -> Result<(), String> {
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<a href=\"&ouml;&ouml;.html\">",
@@ -204,11 +204,11 @@ fn character_reference() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         character_reference: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>&amp;amp;</p>",
@@ -216,7 +216,7 @@ fn character_reference() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("&nbsp; &amp; &copy; &AElig; &Dcaron;\n&frac34; &HilbertSpace; &DifferentialD;\n&ClockwiseContourIntegral; &ngE;\n&#35; &#1234; &#992; &#0;\n&#X22; &#XD06; &#xcab;", &ParseOptions::default())?,
+        to_mdast("&nbsp; &amp; &copy; &AElig; &Dcaron;\n&frac34; &HilbertSpace; &DifferentialD;\n&ClockwiseContourIntegral; &ngE;\n&#35; &#1234; &#992; &#0;\n&#X22; &#XD06; &#xcab;", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![Node::Text(Text {
diff --git a/tests/code_fenced.rs b/tests/code_fenced.rs
index e544ade..73bcb9a 100644
--- a/tests/code_fenced.rs
+++ b/tests/code_fenced.rs
@@ -269,11 +269,11 @@ fn code_fenced() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         code_fenced: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>```</p>",
@@ -283,7 +283,7 @@ fn code_fenced() -> Result<(), String> {
     assert_eq!(
         to_mdast(
             "```js extra\nconsole.log(1)\nconsole.log(2)\n```",
-            &ParseOptions::default()
+            &Default::default()
         )?,
         Node::Root(Root {
             children: vec![Node::Code(Code {
@@ -298,7 +298,7 @@ fn code_fenced() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("```\nasd", &ParseOptions::default())?,
+        to_mdast("```\nasd", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Code(Code {
                 lang: None,
@@ -312,7 +312,7 @@ fn code_fenced() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("```\rasd\r```", &ParseOptions::default())?,
+        to_mdast("```\rasd\r```", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Code(Code {
                 lang: None,
@@ -326,7 +326,7 @@ fn code_fenced() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("```\r\nasd\r\n```", &ParseOptions::default())?,
+        to_mdast("```\r\nasd\r\n```", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Code(Code {
                 lang: None,
diff --git a/tests/code_indented.rs b/tests/code_indented.rs
index 6545ed6..66046c4 100644
--- a/tests/code_indented.rs
+++ b/tests/code_indented.rs
@@ -127,11 +127,11 @@ fn code_indented() -> Result<(), String> {
         parse: ParseOptions {
             constructs: Constructs {
                 code_indented: false,
-                ..Constructs::default()
+                ..Default::default()
             },
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -177,13 +177,13 @@ fn code_indented() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         code_indented: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 }
             }
         )?,
@@ -206,7 +206,7 @@ fn code_indented() -> Result<(), String> {
     assert_eq!(
         to_mdast(
             "\tconsole.log(1)\n    console.log(2)\n",
-            &ParseOptions::default()
+            &Default::default()
         )?,
         Node::Root(Root {
             children: vec![Node::Code(Code {
diff --git a/tests/code_text.rs b/tests/code_text.rs
index 2784398..482c46f 100644
--- a/tests/code_text.rs
+++ b/tests/code_text.rs
@@ -13,9 +13,9 @@ fn code_text() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -170,11 +170,11 @@ fn code_text() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         code_text: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>`a`</p>",
@@ -182,7 +182,7 @@ fn code_text() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("a `alpha` b.", &ParseOptions::default())?,
+        to_mdast("a `alpha` b.", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![
diff --git a/tests/definition.rs b/tests/definition.rs
index 5f9c286..46d9cf5 100644
--- a/tests/definition.rs
+++ b/tests/definition.rs
@@ -13,9 +13,9 @@ fn definition() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -497,11 +497,11 @@ fn definition() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         definition: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>[foo]: /url &quot;title&quot;</p>",
@@ -509,7 +509,7 @@ fn definition() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("[a]: <b> 'c'", &ParseOptions::default())?,
+        to_mdast("[a]: <b> 'c'", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Definition(Definition {
                 url: "b".into(),
diff --git a/tests/frontmatter.rs b/tests/frontmatter.rs
index b1380b6..7e647d9 100644
--- a/tests/frontmatter.rs
+++ b/tests/frontmatter.rs
@@ -13,11 +13,11 @@ fn frontmatter() -> Result<(), String> {
         parse: ParseOptions {
             constructs: Constructs {
                 frontmatter: true,
-                ..Constructs::default()
+                ..Default::default()
             },
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/fuzz.rs b/tests/fuzz.rs
index 819edf6..8d64ff2 100644
--- a/tests/fuzz.rs
+++ b/tests/fuzz.rs
@@ -1,5 +1,5 @@
 extern crate markdown;
-use markdown::{to_html, to_html_with_options, CompileOptions, Constructs, Options, ParseOptions};
+use markdown::{to_html, to_html_with_options, Options};
 use pretty_assertions::assert_eq;
 
 #[test]
@@ -13,19 +13,7 @@ fn fuzz() -> Result<(), String> {
     // The first link is stopped by the `+` (so it’s `a@b.c`), but the next
     // link overlaps it (`b.c+d@e.f`).
     assert_eq!(
-        to_html_with_options(
-            "a@b.c+d@e.f",
-            &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
-                compile: CompileOptions {
-                    gfm_tagfilter: true,
-                    ..CompileOptions::default()
-                }
-            }
-        )?,
+        to_html_with_options("a@b.c+d@e.f", &Options::gfm())?,
         "<p><a href=\"mailto:a@b.c\">a@b.c</a><a href=\"mailto:+d@e.f\">+d@e.f</a></p>",
         "2: gfm: email autolink literals running into each other"
     );
diff --git a/tests/gfm_autolink_literal.rs b/tests/gfm_autolink_literal.rs
index cdeecd3..cb38f29 100644
--- a/tests/gfm_autolink_literal.rs
+++ b/tests/gfm_autolink_literal.rs
@@ -3,20 +3,12 @@ use markdown::{
     mdast::{Link, Node, Paragraph, Root, Text},
     to_html, to_html_with_options, to_mdast,
     unist::Position,
-    Constructs, Options, ParseOptions,
+    Options, ParseOptions,
 };
 use pretty_assertions::assert_eq;
 
 #[test]
 fn gfm_autolink_literal() -> Result<(), String> {
-    let gfm = Options {
-        parse: ParseOptions {
-            constructs: Constructs::gfm(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
-    };
-
     assert_eq!(
         to_html("https://example.com"),
         "<p>https://example.com</p>",
@@ -34,165 +26,165 @@ fn gfm_autolink_literal() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("https://example.com", &gfm)?,
+        to_html_with_options("https://example.com", &Options::gfm())?,
         "<p><a href=\"https://example.com\">https://example.com</a></p>",
         "should support protocol urls if enabled"
     );
     assert_eq!(
-        to_html_with_options("www.example.com", &gfm)?,
+        to_html_with_options("www.example.com", &Options::gfm())?,
         "<p><a href=\"http://www.example.com\">www.example.com</a></p>",
         "should support www urls if enabled"
     );
     assert_eq!(
-        to_html_with_options("user@example.com", &gfm)?,
+        to_html_with_options("user@example.com", &Options::gfm())?,
         "<p><a href=\"mailto:user@example.com\">user@example.com</a></p>",
         "should support email urls if enabled"
     );
 
     assert_eq!(
-        to_html_with_options("[https://example.com](xxx)", &gfm)?,
+        to_html_with_options("[https://example.com](xxx)", &Options::gfm())?,
         "<p><a href=\"xxx\">https://example.com</a></p>",
         "should not link protocol urls in links"
     );
     assert_eq!(
-        to_html_with_options("[www.example.com](xxx)", &gfm)?,
+        to_html_with_options("[www.example.com](xxx)", &Options::gfm())?,
         "<p><a href=\"xxx\">www.example.com</a></p>",
         "should not link www urls in links"
     );
     assert_eq!(
-        to_html_with_options("[user@example.com](xxx)", &gfm)?,
+        to_html_with_options("[user@example.com](xxx)", &Options::gfm())?,
         "<p><a href=\"xxx\">user@example.com</a></p>",
         "should not link email urls in links"
     );
 
     assert_eq!(
-        to_html_with_options("user@example.com", &gfm)?,
+        to_html_with_options("user@example.com", &Options::gfm())?,
         "<p><a href=\"mailto:user@example.com\">user@example.com</a></p>",
         "should support a closing paren at TLD (email)"
     );
 
     assert_eq!(
-        to_html_with_options("www.a.)", &gfm)?,
+        to_html_with_options("www.a.)", &Options::gfm())?,
         "<p><a href=\"http://www.a\">www.a</a>.)</p>",
         "should support a closing paren at TLD (www)"
     );
 
     assert_eq!(
-        to_html_with_options("www.a b", &gfm)?,
+        to_html_with_options("www.a b", &Options::gfm())?,
         "<p><a href=\"http://www.a\">www.a</a> b</p>",
         "should support no TLD"
     );
 
     assert_eq!(
-        to_html_with_options("www.a/b c", &gfm)?,
+        to_html_with_options("www.a/b c", &Options::gfm())?,
         "<p><a href=\"http://www.a/b\">www.a/b</a> c</p>",
         "should support a path instead of TLD"
     );
 
     assert_eq!(
-        to_html_with_options("www.�a", &gfm)?,
+        to_html_with_options("www.�a", &Options::gfm())?,
         "<p><a href=\"http://www.%EF%BF%BDa\">www.�a</a></p>",
         "should support a replacement character in a domain"
     );
 
     assert_eq!(
-        to_html_with_options("http://點看.com", &gfm)?,
+        to_html_with_options("http://點看.com", &Options::gfm())?,
         "<p><a href=\"http://%E9%BB%9E%E7%9C%8B.com\">http://點看.com</a></p>",
         "should support non-ascii characters in a domain (http)"
     );
 
     assert_eq!(
-        to_html_with_options("www.點看.com", &gfm)?,
+        to_html_with_options("www.點看.com", &Options::gfm())?,
         "<p><a href=\"http://www.%E9%BB%9E%E7%9C%8B.com\">www.點看.com</a></p>",
         "should support non-ascii characters in a domain (www)"
     );
 
     assert_eq!(
-        to_html_with_options("點看@example.com", &gfm)?,
+        to_html_with_options("點看@example.com", &Options::gfm())?,
         "<p>點看@example.com</p>",
         "should *not* support non-ascii characters in atext (email)"
     );
 
     assert_eq!(
-        to_html_with_options("example@點看.com", &gfm)?,
+        to_html_with_options("example@點看.com", &Options::gfm())?,
         "<p>example@點看.com</p>",
         "should *not* support non-ascii characters in a domain (email)"
     );
 
     assert_eq!(
-        to_html_with_options("www.a.com/點看", &gfm)?,
+        to_html_with_options("www.a.com/點看", &Options::gfm())?,
         "<p><a href=\"http://www.a.com/%E9%BB%9E%E7%9C%8B\">www.a.com/點看</a></p>",
         "should support non-ascii characters in a path"
     );
 
     assert_eq!(
-        to_html_with_options("www.-a.b", &gfm)?,
+        to_html_with_options("www.-a.b", &Options::gfm())?,
         "<p><a href=\"http://www.-a.b\">www.-a.b</a></p>",
         "should support a dash to start a domain"
     );
 
     assert_eq!(
-        to_html_with_options("www.$", &gfm)?,
+        to_html_with_options("www.$", &Options::gfm())?,
         "<p><a href=\"http://www.$\">www.$</a></p>",
         "should support a dollar as a domain name"
     );
 
     assert_eq!(
-        to_html_with_options("www.a..b.c", &gfm)?,
+        to_html_with_options("www.a..b.c", &Options::gfm())?,
         "<p><a href=\"http://www.a..b.c\">www.a..b.c</a></p>",
         "should support adjacent dots in a domain name"
     );
 
     assert_eq!(
-        to_html_with_options("www.a&a;", &gfm)?,
+        to_html_with_options("www.a&a;", &Options::gfm())?,
         "<p><a href=\"http://www.a\">www.a</a>&amp;a;</p>",
         "should support named character references in domains"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc/d/e/).", &gfm)?,
+        to_html_with_options("https://a.bc/d/e/).", &Options::gfm())?,
         "<p><a href=\"https://a.bc/d/e/\">https://a.bc/d/e/</a>).</p>",
         "should support a closing paren and period after a path"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc/d/e/.)", &gfm)?,
+        to_html_with_options("https://a.bc/d/e/.)", &Options::gfm())?,
         "<p><a href=\"https://a.bc/d/e/\">https://a.bc/d/e/</a>.)</p>",
         "should support a period and closing paren after a path"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc).", &gfm)?,
+        to_html_with_options("https://a.bc).", &Options::gfm())?,
         "<p><a href=\"https://a.bc\">https://a.bc</a>).</p>",
         "should support a closing paren and period after a domain"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc.)", &gfm)?,
+        to_html_with_options("https://a.bc.)", &Options::gfm())?,
         "<p><a href=\"https://a.bc\">https://a.bc</a>.)</p>",
         "should support a period and closing paren after a domain"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc).d", &gfm)?,
+        to_html_with_options("https://a.bc).d", &Options::gfm())?,
         "<p><a href=\"https://a.bc).d\">https://a.bc).d</a></p>",
         "should support a closing paren and period in a path"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc.)d", &gfm)?,
+        to_html_with_options("https://a.bc.)d", &Options::gfm())?,
         "<p><a href=\"https://a.bc.)d\">https://a.bc.)d</a></p>",
         "should support a period and closing paren in a path"
     );
 
     assert_eq!(
-        to_html_with_options("https://a.bc/))d", &gfm)?,
+        to_html_with_options("https://a.bc/))d", &Options::gfm())?,
         "<p><a href=\"https://a.bc/))d\">https://a.bc/))d</a></p>",
         "should support two closing parens in a path"
     );
 
     assert_eq!(
-        to_html_with_options("ftp://a/b/c.txt", &gfm)?,
+        to_html_with_options("ftp://a/b/c.txt", &Options::gfm())?,
         "<p>ftp://a/b/c.txt</p>",
         "should not support ftp links"
     );
@@ -201,19 +193,19 @@ fn gfm_autolink_literal() -> Result<(), String> {
     // Fixing it would mean deviating from `cmark-gfm`:
     // Source: <https://github.com/github/cmark-gfm/blob/ef1cfcb/extensions/autolink.c#L156>.
     // assert_eq!(
-    //     to_html_with_options("，www.example.com", &gfm)?,
+    //     to_html_with_options("，www.example.com", &Options::gfm())?,
     //     "<p>，<a href=\"http://www.example.com\">www.example.com</a></p>",
     //     "should support www links after Unicode punctuation",
     // );
 
     assert_eq!(
-        to_html_with_options("，https://example.com", &gfm)?,
+        to_html_with_options("，https://example.com", &Options::gfm())?,
         "<p>，<a href=\"https://example.com\">https://example.com</a></p>",
         "should support http links after Unicode punctuation"
     );
 
     assert_eq!(
-        to_html_with_options("，example@example.com", &gfm)?,
+        to_html_with_options("，example@example.com", &Options::gfm())?,
         "<p>，<a href=\"mailto:example@example.com\">example@example.com</a></p>",
         "should support email links after Unicode punctuation"
     );
@@ -221,14 +213,14 @@ fn gfm_autolink_literal() -> Result<(), String> {
     assert_eq!(
         to_html_with_options(
             "http&#x3A;//user:password@host:port/path?key=value#fragment",
-            &gfm
+            &Options::gfm()
         )?,
         "<p>http://user:password@host:port/path?key=value#fragment</p>",
         "should not link character reference for `:`"
     );
 
     assert_eq!(
-        to_html_with_options("http://example.com/ab<cd", &gfm)?,
+        to_html_with_options("http://example.com/ab<cd", &Options::gfm())?,
         "<p><a href=\"http://example.com/ab\">http://example.com/ab</a>&lt;cd</p>",
         "should stop domains/paths at `<`"
     );
@@ -259,7 +251,7 @@ xmpp:scyther@pokemon.com/message
 xmpp:scyther@pokemon.com/message.
 
 Email me at:scyther@pokemon.com"###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><a href="mailto:scyther@pokemon.com">mailto:scyther@pokemon.com</a></p>
 <p>This is a <a href="mailto:scyther@pokemon.com">mailto:scyther@pokemon.com</a></p>
@@ -305,7 +297,7 @@ a www.example.com&. b
 
 a www.example.com& b
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>a <a href="http://www.example.com&amp;xxx;b">www.example.com&amp;xxx;b</a> c</p>
 <p>a <a href="http://www.example.com">www.example.com</a>&amp;xxx;. b</p>
@@ -352,7 +344,7 @@ a www.example.com& b
 
 ![ contact@example.com ](#)
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>[ <a href="http://www.example.com">www.example.com</a></p>
 <p>[ <a href="https://example.com">https://example.com</a></p>
@@ -399,7 +391,7 @@ www.example.com/?q=a(business)))
 
 (www.example.com/?q=a(business)".
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><a href="http://www.example.com/?=a(b)cccccc">www.example.com/?=a(b)cccccc</a></p>
 <p><a href="http://www.example.com/?=a(b(c)ccccc">www.example.com/?=a(b(c)ccccc</a></p>
@@ -544,7 +536,7 @@ Can contain an underscore followed by a period: aaa@a.b_.c
 
 [link]() <http://autolink> should still be expanded.
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Literal autolinks</h1>
 <h2>WWW autolinks</h2>
@@ -648,7 +640,7 @@ H5.
 
 [[]]www.a.com&copy;b
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>H0.</p>
 <p>[<a href="https://a.com&amp;copy;b">https://a.com&amp;copy;b</a></p>
@@ -724,7 +716,7 @@ Autolink literal after image.
 ![a]() www.a.com
 
 ![a]() a@b.c
-"###, &gfm)?,
+"###, &Options::gfm())?,
         r###"<p>Image start.</p>
 <p>![<a href="https://a.com">https://a.com</a></p>
 <p>![<a href="http://a.com">http://a.com</a></p>
@@ -866,7 +858,7 @@ Autolink literal after link.
 [a]() www.a.com
 
 [a]() a@b.c
-"###, &gfm)?,
+"###, &Options::gfm())?,
         r###"<p>Link start.</p>
 <p>[<a href="https://a.com">https://a.com</a></p>
 <p>[<a href="http://a.com">http://a.com</a></p>
@@ -998,7 +990,7 @@ www.a&b}
 
 www.a&b~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>“character reference”</h1>
 <p><a href="http://www.a&amp;b">www.a&amp;b</a> (space)</p>
@@ -1109,7 +1101,7 @@ www.a&#35|
 www.a&#35}
 
 www.a&#35~
-"###, &gfm)?,
+"###, &Options::gfm())?,
         r###"<h1>“character reference”</h1>
 <p><a href="http://www.a&amp;#35">www.a&amp;#35</a> (space)</p>
 <p><a href="http://www.a&amp;#35">www.a&amp;#35</a>!</p>
@@ -1181,7 +1173,7 @@ react@0.0.0-experimental-aae83a4b9
 
 [ react@0.0.0-experimental-aae83a4b9
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>a@0.0</p>
 <p><a href="mailto:a@0.b">a@0.b</a></p>
@@ -1274,7 +1266,7 @@ http://a}
 
 http://a~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>httpshhh? (2)</h1>
 <p><a href="http://a">http://a</a> (space)</p>
@@ -1387,7 +1379,7 @@ http://}
 
 http://~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>httpshhh? (1)</h1>
 <p>http:// (space)</p>
@@ -1500,7 +1492,7 @@ http://a/b}
 
 http://a/b~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>httpshhh? (4)</h1>
 <p><a href="http://a/b">http://a/b</a> (space)</p>
@@ -1613,7 +1605,7 @@ http://a/}
 
 http://a/~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>httpshhh? (3)</h1>
 <p><a href="http://a/">http://a/</a> (space)</p>
@@ -1668,7 +1660,7 @@ www.example.com/a&bogus;
 
 www.example.com/a\.
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><a href="#">www.example.com/a©</a></p>
 <p><a href="http://www.example.com/a">www.example.com/a</a>©</p>
@@ -1752,7 +1744,7 @@ www.a/b&c}
 
 www.a/b&c~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>“character reference”</h1>
 <p><a href="http://www.a/b&amp;c">www.a/b&amp;c</a> (space)</p>
@@ -1865,7 +1857,7 @@ www.a/b&#35}
 
 www.a/b&#35~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>“character reference”</h1>
 <p><a href="http://www.a/b&amp;#35">www.a/b&amp;#35</a> (space)</p>
@@ -1950,7 +1942,7 @@ http://a.com#d]()
 
 www.a.com#d]()
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>In autolink literal path or link end?</p>
 <p><a href="">https://a.com/d</a></p>
@@ -2023,7 +2015,7 @@ Some non-ascii: 中noreply@example.com, 中http://example.com, 中https://exampl
 
 Some more non-ascii: 🤷‍noreply@example.com, 🤷‍http://example.com, 🤷‍https://example.com, 🤷‍www.example.com
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Last non-markdown ASCII whitespace (FF): <a href="mailto:noreply@example.com">noreply@example.com</a>, <a href="http://example.com">http://example.com</a>, <a href="https://example.com">https://example.com</a>, www.example.com</p>
 <p>Last non-whitespace ASCII control (US): <a href="mailto:noreply@example.com">noreply@example.com</a>, <a href="http://example.com">http://example.com</a>, <a href="https://example.com">https://example.com</a>, www.example.com</p>
@@ -2130,7 +2122,7 @@ See `https://github.com/remarkjs/remark/discussions/678`.
 
 [asd] ,https://github.com
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>HTTP</h1>
 <p><a href="https://a.b">https://a.b</a> can start after EOF</p>
@@ -2250,7 +2242,7 @@ www.a}
 
 www.a~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>wwwtf 2?</h1>
 <p><a href="http://www.a">www.a</a> (space)</p>
@@ -2363,7 +2355,7 @@ www.a.}
 
 www.a.~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>wwwtf 5?</h1>
 <p><a href="http://www.a">www.a</a>. (space)</p>
@@ -2476,7 +2468,7 @@ www.}
 
 www.~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>wwwtf?</h1>
 <p><a href="http://www">www</a>. (space)</p>
@@ -2589,7 +2581,7 @@ www.a/b}
 
 www.a/b~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>wwwtf? (4)</h1>
 <p><a href="http://www.a/b">www.a/b</a> (space)</p>
@@ -2702,7 +2694,7 @@ www.a/}
 
 www.a/~
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>wwwtf? (3)</h1>
 <p><a href="http://www.a/">www.a/</a> (space)</p>
@@ -2746,7 +2738,7 @@ www.a/~
     assert_eq!(
         to_mdast(
             "a https://alpha.com b bravo@charlie.com c www.delta.com d xmpp:echo@foxtrot.com e mailto:golf@hotel.com f.",
-            &gfm.parse
+            &ParseOptions::gfm()
         )?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
diff --git a/tests/gfm_footnote.rs b/tests/gfm_footnote.rs
index f5ae0cb..e036857 100644
--- a/tests/gfm_footnote.rs
+++ b/tests/gfm_footnote.rs
@@ -3,20 +3,12 @@ use markdown::{
     mdast::{FootnoteDefinition, FootnoteReference, Node, Paragraph, Root, Text},
     to_html, to_html_with_options, to_mdast,
     unist::Position,
-    CompileOptions, Constructs, Options, ParseOptions,
+    CompileOptions, Options, ParseOptions,
 };
 use pretty_assertions::assert_eq;
 
 #[test]
 fn gfm_footnote() -> Result<(), String> {
-    let gfm = Options {
-        parse: ParseOptions {
-            constructs: Constructs::gfm(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
-    };
-
     assert_eq!(
         to_html("A call.[^a]\n\n[^a]: whatevs"),
         "<p>A call.<a href=\"whatevs\">^a</a></p>\n",
@@ -24,7 +16,7 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("A call.[^a]\n\n[^a]: whatevs", &gfm)?,
+        to_html_with_options("A call.[^a]\n\n[^a]: whatevs", &Options::gfm())?,
         "<p>A call.<sup><a href=\"#user-content-fn-a\" id=\"user-content-fnref-a\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup></p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -41,14 +33,11 @@ fn gfm_footnote() -> Result<(), String> {
         to_html_with_options(
             "Noot.[^a]\n\n[^a]: dingen",
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
+                parse: ParseOptions::gfm(),
                 compile: CompileOptions {
-                gfm_footnote_label: Some("Voetnoten".into()),
-                gfm_footnote_back_label: Some("Terug naar de inhoud".into()),
-                    ..CompileOptions::default()
+                    gfm_footnote_label: Some("Voetnoten".into()),
+                    gfm_footnote_back_label: Some("Terug naar de inhoud".into()),
+                    ..CompileOptions::gfm()
                 }
             }
         )?,
@@ -68,13 +57,10 @@ fn gfm_footnote() -> Result<(), String> {
         to_html_with_options(
             "[^a]\n\n[^a]: b",
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
+                parse: ParseOptions::gfm(),
                 compile: CompileOptions {
-                gfm_footnote_label_tag_name: Some("h1".into()),
-                    ..CompileOptions::default()
+                    gfm_footnote_label_tag_name: Some("h1".into()),
+                    ..CompileOptions::gfm()
                 }
             }
         )?,
@@ -94,13 +80,10 @@ fn gfm_footnote() -> Result<(), String> {
         to_html_with_options(
             "[^a]\n\n[^a]: b",
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
+                parse: ParseOptions::gfm(),
                 compile: CompileOptions {
-                gfm_footnote_label_attributes: Some("class=\"footnote-heading\"".into()),
-                    ..CompileOptions::default()
+                    gfm_footnote_label_attributes: Some("class=\"footnote-heading\"".into()),
+                    ..CompileOptions::gfm()
                 }
             }
         )?,
@@ -120,13 +103,10 @@ fn gfm_footnote() -> Result<(), String> {
         to_html_with_options(
             "[^a]\n\n[^a]: b",
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
+                parse: ParseOptions::gfm(),
                 compile: CompileOptions {
                     gfm_footnote_clobber_prefix: Some("".into()),
-                    ..CompileOptions::default()
+                    ..CompileOptions::gfm()
                 }
             }
         )?,
@@ -143,19 +123,19 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("A paragraph.\n\n[^a]: whatevs", &gfm)?,
+        to_html_with_options("A paragraph.\n\n[^a]: whatevs", &Options::gfm())?,
         "<p>A paragraph.</p>\n",
         "should ignore definitions w/o calls"
     );
 
     assert_eq!(
-        to_html_with_options("a[^b]", &gfm)?,
+        to_html_with_options("a[^b]", &Options::gfm())?,
         "<p>a[^b]</p>",
         "should ignore calls w/o definitions"
     );
 
     assert_eq!(
-        to_html_with_options("a[^b]\n\n[^b]: c\n[^b]: d", &gfm)?,
+        to_html_with_options("a[^b]\n\n[^b]: c\n[^b]: d", &Options::gfm())?,
         "<p>a<sup><a href=\"#user-content-fn-b\" id=\"user-content-fnref-b\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup></p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -169,7 +149,7 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("a[^b], c[^b]\n\n[^b]: d", &gfm)?,
+        to_html_with_options("a[^b], c[^b]\n\n[^b]: d", &Options::gfm())?,
         "<p>a<sup><a href=\"#user-content-fn-b\" id=\"user-content-fnref-b\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>, c<sup><a href=\"#user-content-fn-b\" id=\"user-content-fnref-b-2\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup></p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -183,32 +163,32 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("![^a](b)", &gfm)?,
+        to_html_with_options("![^a](b)", &Options::gfm())?,
         "<p>!<a href=\"b\">^a</a></p>",
         "should not support images starting w/ `^` (but see it as a link?!, 1)"
     );
 
     assert_eq!(
-        to_html_with_options("![^a][b]\n\n[b]: c", &gfm)?,
+        to_html_with_options("![^a][b]\n\n[b]: c", &Options::gfm())?,
         "<p>!<a href=\"c\">^a</a></p>\n",
         "should not support images starting w/ `^` (but see it as a link?!, 2)"
     );
 
     assert_eq!(
-        to_html_with_options("[^]()", &gfm)?,
+        to_html_with_options("[^]()", &Options::gfm())?,
         "<p><a href=\"\">^</a></p>",
         "should support an empty link with caret"
     );
 
     assert_eq!(
-        to_html_with_options("![^]()", &gfm)?,
+        to_html_with_options("![^]()", &Options::gfm())?,
         "<p>!<a href=\"\">^</a></p>",
         "should support an empty image with caret (as link)"
     );
 
     // <https://github.com/github/cmark-gfm/issues/239>
     assert_eq!(
-        to_html_with_options("Call.[^a\\+b].\n\n[^a\\+b]: y", &gfm)?,
+        to_html_with_options("Call.[^a\\+b].\n\n[^a\\+b]: y", &Options::gfm())?,
         "<p>Call.<sup><a href=\"#user-content-fn-a%5C+b\" id=\"user-content-fnref-a%5C+b\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -222,7 +202,7 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("Call.[^a&copy;b].\n\n[^a&copy;b]: y", &gfm)?,
+        to_html_with_options("Call.[^a&copy;b].\n\n[^a&copy;b]: y", &Options::gfm())?,
         "<p>Call.<sup><a href=\"#user-content-fn-a&amp;copy;b\" id=\"user-content-fnref-a&amp;copy;b\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -238,7 +218,7 @@ fn gfm_footnote() -> Result<(), String> {
     // <https://github.com/github/cmark-gfm/issues/239>
     // <https://github.com/github/cmark-gfm/issues/240>
     assert_eq!(
-        to_html_with_options("Call.[^a\\]b].\n\n[^a\\]b]: y", &gfm)?,
+        to_html_with_options("Call.[^a\\]b].\n\n[^a\\]b]: y", &Options::gfm())?,
         "<p>Call.<sup><a href=\"#user-content-fn-a%5C%5Db\" id=\"user-content-fnref-a%5C%5Db\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -252,7 +232,7 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("Call.[^a&#91;b].\n\n[^a&#91;b]: y", &gfm)?,
+        to_html_with_options("Call.[^a&#91;b].\n\n[^a&#91;b]: y", &Options::gfm())?,
         "<p>Call.<sup><a href=\"#user-content-fn-a&amp;#91;b\" id=\"user-content-fnref-a&amp;#91;b\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -266,19 +246,19 @@ fn gfm_footnote() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("Call.[^a\\+b].\n\n[^a+b]: y", &gfm)?,
+        to_html_with_options("Call.[^a\\+b].\n\n[^a+b]: y", &Options::gfm())?,
         "<p>Call.[^a+b].</p>\n",
         "should match calls to definitions on the source of the label, not on resolved escapes"
     );
 
     assert_eq!(
-        to_html_with_options("Call.[^a&#91;b].\n\n[^a\\[b]: y", &gfm)?,
+        to_html_with_options("Call.[^a&#91;b].\n\n[^a\\[b]: y", &Options::gfm())?,
         "<p>Call.[^a[b].</p>\n",
         "should match calls to definitions on the source of the label, not on resolved references"
     );
 
     assert_eq!(
-        to_html_with_options("[^1].\n\n[^1]: a\nb", &gfm)?,
+        to_html_with_options("[^1].\n\n[^1]: a\nb", &Options::gfm())?,
         "<p><sup><a href=\"#user-content-fn-1\" id=\"user-content-fnref-1\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -293,7 +273,7 @@ b <a href=\"#user-content-fnref-1\" data-footnote-backref=\"\" aria-label=\"Back
     );
 
     assert_eq!(
-        to_html_with_options("[^1].\n\n> [^1]: a\nb", &gfm)?,
+        to_html_with_options("[^1].\n\n> [^1]: a\nb", &Options::gfm())?,
         "<p><sup><a href=\"#user-content-fn-1\" id=\"user-content-fnref-1\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <blockquote>
 </blockquote>
@@ -310,7 +290,7 @@ b <a href=\"#user-content-fnref-1\" data-footnote-backref=\"\" aria-label=\"Back
     );
 
     assert_eq!(
-        to_html_with_options("[^1].\n\n> [^1]: a\n> b", &gfm)?,
+        to_html_with_options("[^1].\n\n> [^1]: a\n> b", &Options::gfm())?,
         "<p><sup><a href=\"#user-content-fn-1\" id=\"user-content-fnref-1\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <blockquote>
 </blockquote>
@@ -327,7 +307,7 @@ b <a href=\"#user-content-fnref-1\" data-footnote-backref=\"\" aria-label=\"Back
     );
 
     assert_eq!(
-        to_html_with_options("[^1].\n\n[^1]: a\n\n    > b", &gfm)?,
+        to_html_with_options("[^1].\n\n[^1]: a\n\n    > b", &Options::gfm())?,
         "<p><sup><a href=\"#user-content-fn-1\" id=\"user-content-fnref-1\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -348,7 +328,7 @@ b <a href=\"#user-content-fnref-1\" data-footnote-backref=\"\" aria-label=\"Back
     let max = "x".repeat(999);
 
     assert_eq!(
-        to_html_with_options(format!("Call.[^{}].\n\n[^{}]: y", max, max).as_str(), &gfm)?,
+        to_html_with_options(format!("Call.[^{}].\n\n[^{}]: y", max, max).as_str(), &Options::gfm())?,
         format!("<p>Call.<sup><a href=\"#user-content-fn-{}\" id=\"user-content-fnref-{}\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup>.</p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
 <ol>
@@ -364,7 +344,7 @@ b <a href=\"#user-content-fnref-1\" data-footnote-backref=\"\" aria-label=\"Back
     assert_eq!(
         to_html_with_options(
             format!("Call.[^a{}].\n\n[^a{}]: y", max, max).as_str(),
-            &gfm
+            &Options::gfm()
         )?,
         format!("<p>Call.[^a{}].</p>\n<p>[^a{}]: y</p>", max, max),
         "should not support 1000 characters in a call / definition"
@@ -373,7 +353,7 @@ b <a href=\"#user-content-fnref-1\" data-footnote-backref=\"\" aria-label=\"Back
     assert_eq!(
         to_html_with_options(
             "[^a]\n\n[^a]: b\n  \n    c",
-            &gfm
+            &Options::gfm()
         )?,
         "<p><sup><a href=\"#user-content-fn-a\" id=\"user-content-fnref-a\" data-footnote-ref=\"\" aria-describedby=\"footnote-label\">1</a></sup></p>
 <section data-footnotes=\"\" class=\"footnotes\"><h2 id=\"footnote-label\" class=\"sr-only\">Footnotes</h2>
@@ -399,7 +379,7 @@ a![^1]
 [^1]: b
 
 [i]: c"###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>a<img src="#" alt="i" />
 a!<a href="#">i</a>
@@ -419,7 +399,7 @@ a!<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref=
     );
 
     assert_eq!(
-        to_html_with_options("a![^1]", &gfm)?,
+        to_html_with_options("a![^1]", &Options::gfm())?,
         "<p>a![^1]</p>",
         "should match bang/caret interplay (undefined) like GitHub"
     );
@@ -430,7 +410,7 @@ a!<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref=
 
 [^1]: b
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>a!<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup></p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -469,7 +449,7 @@ even another caret.
 
 [^^]: caret
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Calls may not be empty: <a href="empty">^</a>.</p>
 <p>Calls cannot contain whitespace only: <a href="empty">^ </a>.</p>
@@ -527,7 +507,7 @@ Some calls.[^ w][^x ][^y][^z]
 
 [^x ]: # z
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>[^c d]: # e</p>
 <p>[^f	g]: # h</p>
@@ -595,7 +575,7 @@ j], [^ l], [^m ]</p>
 
 [^![image](#)]: a
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         // Note:
         // * GH does not support colons.
@@ -654,7 +634,7 @@ j], [^ l], [^m ]</p>
   More.
 [^4]: Directly after a list item.
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Call<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <blockquote>
@@ -711,7 +691,7 @@ j], [^ l], [^m ]</p>
 
 - list
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <h1>Heading</h1>
@@ -768,7 +748,7 @@ Lazy?
 
 Lazy!
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Call<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup><sup><a href="#user-content-fn-5" id="user-content-fnref-5" data-footnote-ref="" aria-describedby="footnote-label">5</a></sup>.</p>
 <p>Lazy?</p>
@@ -824,7 +804,7 @@ Lazy!
 
 [^10]:- - - kilo
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Note!<sup><a href="#user-content-fn-0" id="user-content-fnref-0" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">5</a></sup><sup><a href="#user-content-fn-5" id="user-content-fnref-5" data-footnote-ref="" aria-describedby="footnote-label">6</a></sup><sup><a href="#user-content-fn-6" id="user-content-fnref-6" data-footnote-ref="" aria-describedby="footnote-label">7</a></sup><sup><a href="#user-content-fn-7" id="user-content-fnref-7" data-footnote-ref="" aria-describedby="footnote-label">8</a></sup><sup><a href="#user-content-fn-8" id="user-content-fnref-8" data-footnote-ref="" aria-describedby="footnote-label">9</a></sup><sup><a href="#user-content-fn-9" id="user-content-fnref-9" data-footnote-ref="" aria-describedby="footnote-label">10</a></sup><sup><a href="#user-content-fn-10" id="user-content-fnref-10" data-footnote-ref="" aria-describedby="footnote-label">11</a></sup></p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -897,7 +877,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
 [^1]: Recursion[^1][^1]
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Call<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-1" id="user-content-fnref-1-2" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup></p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -919,7 +899,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
 [^1]: b
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Call<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup></p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -961,7 +941,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
 [^5]: e
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><em>emphasis<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup></em></p>
 <p><strong>strong<sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup></strong></p>
@@ -998,7 +978,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
 [^3]: c
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>What are these!<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup>, !<sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup>[], and ![this]<sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup>.</p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -1040,7 +1020,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 …continuation
 *   list
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><sup><a href="#user-content-fn-0" id="user-content-fnref-0" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">5</a></sup><sup><a href="#user-content-fn-5" id="user-content-fnref-5" data-footnote-ref="" aria-describedby="footnote-label">6</a></sup></p>
 <h1>Heading</h1>
@@ -1093,7 +1073,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
 [^3]: c
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>What are these<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup>, <sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup>[], and [this]<sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup>.</p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -1143,7 +1123,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
 - list
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <h1>Heading</h1>
@@ -1205,7 +1185,7 @@ indented delta <a href="#user-content-fnref-2" data-footnote-backref="" aria-lab
 
     - list
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -1254,7 +1234,7 @@ more code
 
 [^3]: [^4]: Paragraph
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Note!<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <ul>
@@ -1304,7 +1284,7 @@ more code
 
 - list
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <h1>Heading</h1>
@@ -1358,7 +1338,7 @@ more code
 
     - list
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p><sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup></p>
 <section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
@@ -1416,7 +1396,7 @@ belong to the previous footnote.
 This paragraph won’t be part of the note, because it
 isn’t indented.
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Here is a footnote reference,<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup> and another.<sup><a href="#user-content-fn-longnote" id="user-content-fnref-longnote" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup></p>
 <p>This paragraph won’t be part of the note, because it
@@ -1484,7 +1464,7 @@ multi-paragraph list items. <a href="#user-content-fnref-longnote" data-footnote
 
    3
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Call[^1][^2]<sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-5" id="user-content-fnref-5" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-6" id="user-content-fnref-6" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup><sup><a href="#user-content-fn-7" id="user-content-fnref-7" data-footnote-ref="" aria-describedby="footnote-label">5</a></sup><sup><a href="#user-content-fn-8" id="user-content-fnref-8" data-footnote-ref="" aria-describedby="footnote-label">6</a></sup><sup><a href="#user-content-fn-9" id="user-content-fnref-9" data-footnote-ref="" aria-describedby="footnote-label">7</a></sup><sup><a href="#user-content-fn-10" id="user-content-fnref-10" data-footnote-ref="" aria-describedby="footnote-label">8</a></sup><sup><a href="#user-content-fn-11" id="user-content-fnref-11" data-footnote-ref="" aria-describedby="footnote-label">9</a></sup><sup><a href="#user-content-fn-12" id="user-content-fnref-12" data-footnote-ref="" aria-describedby="footnote-label">10</a></sup>.</p>
 <pre><code> [^1]: 5
@@ -1576,7 +1556,7 @@ multi-paragraph list items. <a href="#user-content-fnref-longnote" data-footnote
 
 0
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Call<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup><sup><a href="#user-content-fn-2" id="user-content-fnref-2" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup><sup><a href="#user-content-fn-3" id="user-content-fnref-3" data-footnote-ref="" aria-describedby="footnote-label">3</a></sup><sup><a href="#user-content-fn-4" id="user-content-fnref-4" data-footnote-ref="" aria-describedby="footnote-label">4</a></sup><sup><a href="#user-content-fn-5" id="user-content-fnref-5" data-footnote-ref="" aria-describedby="footnote-label">5</a></sup><sup><a href="#user-content-fn-6" id="user-content-fnref-6" data-footnote-ref="" aria-describedby="footnote-label">6</a></sup><sup><a href="#user-content-fn-7" id="user-content-fnref-7" data-footnote-ref="" aria-describedby="footnote-label">7</a></sup><sup><a href="#user-content-fn-8" id="user-content-fnref-8" data-footnote-ref="" aria-describedby="footnote-label">8</a></sup><sup><a href="#user-content-fn-9" id="user-content-fnref-9" data-footnote-ref="" aria-describedby="footnote-label">9</a></sup>.</p>
 <p>3</p>
@@ -1635,7 +1615,7 @@ multi-paragraph list items. <a href="#user-content-fnref-longnote" data-footnote
 
 [3]: c
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<p>Here is a short reference,<a href="a">1</a>, a collapsed one,<a href="b">2</a>, and a full <a href="c">one</a>.</p>
 "###,
@@ -1643,7 +1623,7 @@ multi-paragraph list items. <a href="#user-content-fnref-longnote" data-footnote
     );
 
     assert_eq!(
-        to_mdast("[^a]: b\n\tc\n\nd [^a] e.", &gfm.parse)?,
+        to_mdast("[^a]: b\n\tc\n\nd [^a] e.", &ParseOptions::gfm())?,
         Node::Root(Root {
             children: vec![
                 Node::FootnoteDefinition(FootnoteDefinition {
diff --git a/tests/gfm_strikethrough.rs b/tests/gfm_strikethrough.rs
index 980f1e9..b8e30a6 100644
--- a/tests/gfm_strikethrough.rs
+++ b/tests/gfm_strikethrough.rs
@@ -3,20 +3,12 @@ use markdown::{
     mdast::{Delete, Node, Paragraph, Root, Text},
     to_html, to_html_with_options, to_mdast,
     unist::Position,
-    Constructs, Options, ParseOptions,
+    Options, ParseOptions,
 };
 use pretty_assertions::assert_eq;
 
 #[test]
 fn gfm_strikethrough() -> Result<(), String> {
-    let gfm = Options {
-        parse: ParseOptions {
-            constructs: Constructs::gfm(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
-    };
-
     assert_eq!(
         to_html("a ~b~ c"),
         "<p>a ~b~ c</p>",
@@ -24,49 +16,49 @@ fn gfm_strikethrough() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("a ~b~", &gfm)?,
+        to_html_with_options("a ~b~", &Options::gfm())?,
         "<p>a <del>b</del></p>",
         "should support strikethrough w/ one tilde"
     );
 
     assert_eq!(
-        to_html_with_options("a ~~b~~", &gfm)?,
+        to_html_with_options("a ~~b~~", &Options::gfm())?,
         "<p>a <del>b</del></p>",
         "should support strikethrough w/ two tildes"
     );
 
     assert_eq!(
-        to_html_with_options("a ~~~b~~~", &gfm)?,
+        to_html_with_options("a ~~~b~~~", &Options::gfm())?,
         "<p>a ~~~b~~~</p>",
         "should not support strikethrough w/ three tildes"
     );
 
     assert_eq!(
-        to_html_with_options("a \\~~~b~~ c", &gfm)?,
+        to_html_with_options("a \\~~~b~~ c", &Options::gfm())?,
         "<p>a ~<del>b</del> c</p>",
         "should support strikethrough after an escaped tilde"
     );
 
     assert_eq!(
-        to_html_with_options("a ~~b ~~c~~ d~~ e", &gfm)?,
+        to_html_with_options("a ~~b ~~c~~ d~~ e", &Options::gfm())?,
         "<p>a <del>b <del>c</del> d</del> e</p>",
         "should support nested strikethrough"
     );
 
     assert_eq!(
-        to_html_with_options("a ~-1~ b", &gfm)?,
+        to_html_with_options("a ~-1~ b", &Options::gfm())?,
         "<p>a <del>-1</del> b</p>",
         "should open if preceded by whitespace and followed by punctuation"
     );
 
     assert_eq!(
-        to_html_with_options("a ~b.~ c", &gfm)?,
+        to_html_with_options("a ~b.~ c", &Options::gfm())?,
         "<p>a <del>b.</del> c</p>",
         "should close if preceded by punctuation and followed by whitespace"
     );
 
     assert_eq!(
-        to_html_with_options("~b.~.", &gfm)?,
+        to_html_with_options("~b.~.", &Options::gfm())?,
         "<p><del>b.</del>.</p>",
         "should close if preceded and followed by punctuation"
     );
@@ -130,7 +122,7 @@ a ~~two b one~ c two~~ d
 
 a ~~two b two~~ c one~ d
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Balanced</h1>
 <p>a <del>one</del> b</p>
@@ -199,7 +191,7 @@ a ~~twoLeft b ~~twoLeft c twoRight~~ d
 
 a ~~twoLeft b ~~twoLeft c ~~twoLeft d
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Flank</h1>
 <p>a oneRight~ b oneRight~ c oneRight~ d</p>
@@ -316,7 +308,7 @@ t ~~**xxx**~~ zzz
 
 u ~**xxx**~ zzz
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Interlpay</h1>
 <h2>Interleave with attention</h2>
@@ -372,11 +364,10 @@ u ~**xxx**~ zzz
             "a ~b~ ~~c~~ d",
             &Options {
                 parse: ParseOptions {
-                    constructs: Constructs::gfm(),
                     gfm_strikethrough_single_tilde: false,
-                    ..ParseOptions::default()
+                    ..ParseOptions::gfm()
                 },
-                ..Options::default()
+                ..Options::gfm()
             }
         )?,
         "<p>a ~b~ <del>c</del> d</p>",
@@ -388,11 +379,10 @@ u ~**xxx**~ zzz
             "a ~b~ ~~c~~ d",
             &Options {
                 parse: ParseOptions {
-                    constructs: Constructs::gfm(),
                     gfm_strikethrough_single_tilde: true,
-                    ..ParseOptions::default()
+                    ..ParseOptions::gfm()
                 },
-                ..Options::default()
+                ..Options::gfm()
             }
         )?,
         "<p>a <del>b</del> <del>c</del> d</p>",
@@ -400,7 +390,7 @@ u ~**xxx**~ zzz
     );
 
     assert_eq!(
-        to_mdast("a ~~alpha~~ b.", &gfm.parse)?,
+        to_mdast("a ~~alpha~~ b.", &ParseOptions::gfm())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![
diff --git a/tests/gfm_table.rs b/tests/gfm_table.rs
index 54e0ace..db1c364 100644
--- a/tests/gfm_table.rs
+++ b/tests/gfm_table.rs
@@ -9,14 +9,6 @@ use pretty_assertions::assert_eq;
 
 #[test]
 fn gfm_table() -> Result<(), String> {
-    let gfm = Options {
-        parse: ParseOptions {
-            constructs: Constructs::gfm(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
-    };
-
     assert_eq!(
         to_html("| a |\n| - |\n| b |"),
         "<p>| a |\n| - |\n| b |</p>",
@@ -24,181 +16,181 @@ fn gfm_table() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n| b |", &gfm)?,
+        to_html_with_options("| a |\n| - |\n| b |", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>",
         "should support tables"
     );
 
     assert_eq!(
-        to_html_with_options("| a |", &gfm)?,
+        to_html_with_options("| a |", &Options::gfm())?,
         "<p>| a |</p>",
         "should not support a table w/ the head row ending in an eof (1)"
     );
 
     assert_eq!(
-        to_html_with_options("| a", &gfm)?,
+        to_html_with_options("| a", &Options::gfm())?,
         "<p>| a</p>",
         "should not support a table w/ the head row ending in an eof (2)"
     );
 
     assert_eq!(
-        to_html_with_options("a |", &gfm)?,
+        to_html_with_options("a |", &Options::gfm())?,
         "<p>a |</p>",
         "should not support a table w/ the head row ending in an eof (3)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |", &gfm)?,
+        to_html_with_options("| a |\n| - |", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should support a table w/ a delimiter row ending in an eof (1)"
     );
 
     assert_eq!(
-        to_html_with_options("| a\n| -", &gfm)?,
+        to_html_with_options("| a\n| -", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should support a table w/ a delimiter row ending in an eof (2)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n| b |", &gfm)?,
+        to_html_with_options("| a |\n| - |\n| b |", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>",
         "should support a table w/ a body row ending in an eof (1)"
     );
 
     assert_eq!(
-        to_html_with_options("| a\n| -\n| b", &gfm)?,
+        to_html_with_options("| a\n| -\n| b", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>",
         "should support a table w/ a body row ending in an eof (2)"
     );
 
     assert_eq!(
-        to_html_with_options("a|b\n-|-\nc|d", &gfm)?,
+        to_html_with_options("a|b\n-|-\nc|d", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>c</td>\n<td>d</td>\n</tr>\n</tbody>\n</table>",
         "should support a table w/ a body row ending in an eof (3)"
     );
 
     assert_eq!(
-        to_html_with_options("| a  \n| -\t\n| b |     ", &gfm)?,
+        to_html_with_options("| a  \n| -\t\n| b |     ", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>",
         "should support rows w/ trailing whitespace (1)"
     );
 
     assert_eq!(
-        to_html_with_options("| a | \n| - |", &gfm)?,
+        to_html_with_options("| a | \n| - |", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should support rows w/ trailing whitespace (2)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - | ", &gfm)?,
+        to_html_with_options("| a |\n| - | ", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should support rows w/ trailing whitespace (3)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n| b | ", &gfm)?,
+        to_html_with_options("| a |\n| - |\n| b | ", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>",
         "should support rows w/ trailing whitespace (4)"
     );
 
     assert_eq!(
-        to_html_with_options("||a|\n|-|-|", &gfm)?,
+        to_html_with_options("||a|\n|-|-|", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th></th>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should support empty first header cells"
     );
 
     assert_eq!(
-        to_html_with_options("|a||\n|-|-|", &gfm)?,
+        to_html_with_options("|a||\n|-|-|", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n<th></th>\n</tr>\n</thead>\n</table>",
         "should support empty last header cells"
     );
 
     assert_eq!(
-        to_html_with_options("a||b\n-|-|-", &gfm)?,
+        to_html_with_options("a||b\n-|-|-", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n<th></th>\n<th>b</th>\n</tr>\n</thead>\n</table>",
         "should support empty header cells"
     );
 
     assert_eq!(
-        to_html_with_options("|a|b|\n|-|-|\n||c|", &gfm)?,
+        to_html_with_options("|a|b|\n|-|-|\n||c|", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td></td>\n<td>c</td>\n</tr>\n</tbody>\n</table>",
         "should support empty first body cells"
     );
 
     assert_eq!(
-        to_html_with_options("|a|b|\n|-|-|\n|c||", &gfm)?,
+        to_html_with_options("|a|b|\n|-|-|\n|c||", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>c</td>\n<td></td>\n</tr>\n</tbody>\n</table>",
         "should support empty last body cells"
     );
 
     assert_eq!(
-        to_html_with_options("a|b|c\n-|-|-\nd||e", &gfm)?,
+        to_html_with_options("a|b|c\n-|-|-\nd||e", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n<th>c</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>d</td>\n<td></td>\n<td>e</td>\n</tr>\n</tbody>\n</table>",
         "should support empty body cells"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n- b", &gfm)?,
+        to_html_with_options("| a |\n| - |\n- b", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<ul>\n<li>b</li>\n</ul>",
         "should support a list after a table"
     );
 
     assert_eq!(
-        to_html_with_options("> | a |\n| - |", &gfm)?,
+        to_html_with_options("> | a |\n| - |", &Options::gfm())?,
         "<blockquote>\n<p>| a |\n| - |</p>\n</blockquote>",
         "should not support a lazy delimiter row (1)"
     );
 
     assert_eq!(
-        to_html_with_options("> a\n> | b |\n| - |", &gfm)?,
+        to_html_with_options("> a\n> | b |\n| - |", &Options::gfm())?,
         "<blockquote>\n<p>a\n| b |\n| - |</p>\n</blockquote>",
         "should not support a lazy delimiter row (2)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n> | - |", &gfm)?,
+        to_html_with_options("| a |\n> | - |", &Options::gfm())?,
         "<p>| a |</p>\n<blockquote>\n<p>| - |</p>\n</blockquote>",
         "should not support a piercing delimiter row"
     );
 
     assert_eq!(
-        to_html_with_options("> a\n> | b |\n|-", &gfm)?,
+        to_html_with_options("> a\n> | b |\n|-", &Options::gfm())?,
         "<blockquote>\n<p>a\n| b |\n|-</p>\n</blockquote>",
         "should not support a lazy body row (2)"
     );
 
     assert_eq!(
-        to_html_with_options("> | a |\n> | - |\n| b |", &gfm)?,
+        to_html_with_options("> | a |\n> | - |\n| b |", &Options::gfm())?,
         "<blockquote>\n<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n</blockquote>\n<p>| b |</p>",
         "should not support a lazy body row (1)"
     );
 
     assert_eq!(
-        to_html_with_options("> a\n> | b |\n> | - |\n| c |", &gfm)?,
+        to_html_with_options("> a\n> | b |\n> | - |\n| c |", &Options::gfm())?,
         "<blockquote>\n<p>a</p>\n<table>\n<thead>\n<tr>\n<th>b</th>\n</tr>\n</thead>\n</table>\n</blockquote>\n<p>| c |</p>",
         "should not support a lazy body row (2)"
     );
 
     assert_eq!(
-        to_html_with_options("> | A |\n> | - |\n> | 1 |\n| 2 |", &gfm)?,
+        to_html_with_options("> | A |\n> | - |\n> | 1 |\n| 2 |", &Options::gfm())?,
         "<blockquote>\n<table>\n<thead>\n<tr>\n<th>A</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>1</td>\n</tr>\n</tbody>\n</table>\n</blockquote>\n<p>| 2 |</p>",
         "should not support a lazy body row (3)"
     );
 
     assert_eq!(
-        to_html_with_options("   - d\n    - e", &gfm)?,
+        to_html_with_options("   - d\n    - e", &Options::gfm())?,
         to_html("   - d\n    - e"),
         "should not change how lists and lazyness work"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n   | - |", &gfm)?,
+        to_html_with_options("| a |\n   | - |", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should form a table if the delimiter row is indented w/ 3 spaces"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n    | - |", &gfm)?,
+        to_html_with_options("| a |\n    | - |", &Options::gfm())?,
         "<p>| a |\n| - |</p>",
         "should not form a table if the delimiter row is indented w/ 4 spaces"
     );
@@ -210,34 +202,34 @@ fn gfm_table() -> Result<(), String> {
                         code_indented: false,
                         ..Constructs::gfm()
                     },
-                    ..ParseOptions::default()
+                    ..ParseOptions::gfm()
                 },
-                ..Options::default()
+                ..Options::gfm()
             })?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>",
         "should form a table if the delimiter row is indented w/ 4 spaces and indented code is turned off"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n> block quote?", &gfm)?,
+        to_html_with_options("| a |\n| - |\n> block quote?", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<blockquote>\n<p>block quote?</p>\n</blockquote>",
         "should be interrupted by a block quote"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n>", &gfm)?,
+        to_html_with_options("| a |\n| - |\n>", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<blockquote>\n</blockquote>",
         "should be interrupted by a block quote (empty)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n- list?", &gfm)?,
+        to_html_with_options("| a |\n| - |\n- list?", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<ul>\n<li>list?</li>\n</ul>",
         "should be interrupted by a list"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n-", &gfm)?,
+        to_html_with_options("| a |\n| - |\n-", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<ul>\n<li></li>\n</ul>",
         "should be interrupted by a list (empty)"
     );
@@ -246,15 +238,12 @@ fn gfm_table() -> Result<(), String> {
         to_html_with_options(
             "| a |\n| - |\n<!-- HTML? -->",
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                    ..CompileOptions::gfm()
+                },
+                ..Options::gfm()
             }
         )?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<!-- HTML? -->",
@@ -263,15 +252,12 @@ fn gfm_table() -> Result<(), String> {
 
     assert_eq!(
         to_html_with_options("| a |\n| - |\n\tcode?", &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                    ..CompileOptions::gfm()
+                },
+                ..Options::gfm()
             })?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<pre><code>code?\n</code></pre>",
         "should be interrupted by code (indented)"
@@ -279,15 +265,12 @@ fn gfm_table() -> Result<(), String> {
 
     assert_eq!(
         to_html_with_options("| a |\n| - |\n```js\ncode?", &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                    ..CompileOptions::gfm()
+                },
+                ..Options::gfm()
             })?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<pre><code class=\"language-js\">code?\n</code></pre>\n",
         "should be interrupted by code (fenced)"
@@ -297,15 +280,12 @@ fn gfm_table() -> Result<(), String> {
         to_html_with_options(
             "| a |\n| - |\n***",
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                    ..CompileOptions::gfm()
+                },
+                ..Options::gfm()
             }
         )?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<hr />",
@@ -313,67 +293,67 @@ fn gfm_table() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\n# heading?", &gfm)?,
+        to_html_with_options("| a |\n| - |\n# heading?", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n<h1>heading?</h1>",
         "should be interrupted by a heading (ATX)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\nheading\n=", &gfm)?,
+        to_html_with_options("| a |\n| - |\nheading\n=", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>heading</td>\n</tr>\n<tr>\n<td>=</td>\n</tr>\n</tbody>\n</table>",
         "should *not* be interrupted by a heading (setext)"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\nheading\n---", &gfm)?,
+        to_html_with_options("| a |\n| - |\nheading\n---", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>heading</td>\n</tr>\n</tbody>\n</table>\n<hr />",
         "should *not* be interrupted by a heading (setext), but interrupt if the underline is also a thematic break"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n| - |\nheading\n-", &gfm)?,
+        to_html_with_options("| a |\n| - |\nheading\n-", &Options::gfm())?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>heading</td>\n</tr>\n</tbody>\n</table>\n<ul>\n<li></li>\n</ul>",
         "should *not* be interrupted by a heading (setext), but interrupt if the underline is also an empty list item bullet"
     );
 
     assert_eq!(
-        to_html_with_options("a\nb\n-:", &gfm)?,
+        to_html_with_options("a\nb\n-:", &Options::gfm())?,
         "<p>a</p>\n<table>\n<thead>\n<tr>\n<th align=\"right\">b</th>\n</tr>\n</thead>\n</table>",
         "should support a single head row"
     );
 
     assert_eq!(
-        to_html_with_options("> | a |\n> | - |", &gfm)?,
+        to_html_with_options("> | a |\n> | - |", &Options::gfm())?,
         "<blockquote>\n<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n</blockquote>",
         "should support a table in a container"
     );
 
     assert_eq!(
-        to_html_with_options("> | a |\n| - |", &gfm)?,
+        to_html_with_options("> | a |\n| - |", &Options::gfm())?,
         "<blockquote>\n<p>| a |\n| - |</p>\n</blockquote>",
         "should not support a lazy delimiter row if the head row is in a container"
     );
 
     assert_eq!(
-        to_html_with_options("| a |\n> | - |", &gfm)?,
+        to_html_with_options("| a |\n> | - |", &Options::gfm())?,
         "<p>| a |</p>\n<blockquote>\n<p>| - |</p>\n</blockquote>",
         "should not support a “piercing” container for the delimiter row, if the head row was not in that container"
     );
 
     assert_eq!(
-        to_html_with_options("> | a |\n> | - |\n| c |", &gfm)?,
+        to_html_with_options("> | a |\n> | - |\n| c |", &Options::gfm())?,
         "<blockquote>\n<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n</table>\n</blockquote>\n<p>| c |</p>",
         "should not support a lazy body row if the head row and delimiter row are in a container"
     );
 
     assert_eq!(
-        to_html_with_options("> | a |\n| - |\n> | c |", &gfm)?,
+        to_html_with_options("> | a |\n| - |\n> | c |", &Options::gfm())?,
         "<blockquote>\n<p>| a |\n| - |\n| c |</p>\n</blockquote>",
         "should not support a lazy delimiter row if the head row and a further body row are in a container"
     );
 
     assert_eq!(
-        to_html_with_options("[\na\n:-\n]: b", &gfm)?,
+        to_html_with_options("[\na\n:-\n]: b", &Options::gfm())?,
         "<p>[</p>\n<table>\n<thead>\n<tr>\n<th align=\"left\">a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td align=\"left\">]: b</td>\n</tr>\n</tbody>\n</table>",
         "should prefer GFM tables over definitions"
     );
@@ -385,13 +365,9 @@ fn gfm_table() -> Result<(), String> {
                         code_indented: false,
                         ..Constructs::gfm()
                     },
-                    ..ParseOptions::default()
+                    ..ParseOptions::gfm()
                 },
-                compile: CompileOptions {
-                    allow_dangerous_html: true,
-                    allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                ..Options::gfm()
             })?,
         "<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>",
         "should support indented rows if code (indented) is off"
@@ -477,7 +453,7 @@ a
 | - | - | :- | -: | :-: |
 | f |
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Align</h1>
 <h2>An empty initial cell</h2>
@@ -606,7 +582,7 @@ a
 | - |
 | b |
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Tables</h1>
 <table>
@@ -708,7 +684,7 @@ a
 a
 |-
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Tables in things</h1>
 <h2>In lists</h2>
@@ -853,7 +829,7 @@ a
 | - |
 | 1 |
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<table>
 <thead>
@@ -931,7 +907,7 @@ bar
 | abc | def |
 | --- | --- |
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Examples from GFM</h1>
 <h2>A</h2>
@@ -1090,15 +1066,12 @@ bar
 `\|\\`
 "###,
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                    ..CompileOptions::gfm()
+                },
+                ..Options::gfm()
             }
         )?,
         r###"<h1>Grave accents</h1>
@@ -1210,7 +1183,7 @@ a
    | D |
     | E |
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Code</h1>
 <h2>Indented delimiter row</h2>
@@ -1405,15 +1378,12 @@ b
 ***
 "###,
             &Options {
-                parse: ParseOptions {
-                    constructs: Constructs::gfm(),
-                    ..ParseOptions::default()
-                },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
-                }
+                    ..CompileOptions::gfm()
+                },
+                ..Options::gfm()
             }
         )?,
         r###"<h2>Blank line</h2>
@@ -1765,7 +1735,7 @@ b
 a
 | - |
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Loose</h1>
 <h2>Loose</h2>
@@ -1817,7 +1787,7 @@ a
 Note: GH has a bug where in case C and E, the escaped escape is treated as a
 normal escape: <https://github.com/github/cmark-gfm/issues/277>.
 "###,
-            &gfm
+            &Options::gfm()
         )?,
         r###"<h1>Some more escapes</h1>
 <table>
@@ -1853,7 +1823,7 @@ normal escape: <a href="https://github.com/github/cmark-gfm/issues/277">https://
     assert_eq!(
         to_mdast(
             "| none | left | right | center |\n| - | :- | -: | :-: |\n| a |\n| b | c | d | e | f |",
-            &gfm.parse
+            &ParseOptions::gfm()
         )?,
         Node::Root(Root {
             children: vec![Node::Table(Table {
@@ -1956,7 +1926,7 @@ normal escape: <a href="https://github.com/github/cmark-gfm/issues/277">https://
     );
 
     assert_eq!(
-        to_mdast("| `a\\|b` |\n| - |", &gfm.parse)?,
+        to_mdast("| `a\\|b` |\n| - |", &ParseOptions::gfm())?,
         Node::Root(Root {
             children: vec![Node::Table(Table {
                 align: vec![AlignKind::None,],
diff --git a/tests/gfm_tagfilter.rs b/tests/gfm_tagfilter.rs
index d808374..e75b96b 100644
--- a/tests/gfm_tagfilter.rs
+++ b/tests/gfm_tagfilter.rs
@@ -10,9 +10,9 @@ fn gfm_tagfilter() -> Result<(), String> {
             &Options {
                 compile: CompileOptions {
                     allow_dangerous_html: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<iframe>",
@@ -25,9 +25,9 @@ fn gfm_tagfilter() -> Result<(), String> {
             &Options {
                 compile: CompileOptions {
                     gfm_tagfilter: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>a &lt;i&gt;</p>\n&lt;script&gt;",
@@ -41,9 +41,9 @@ fn gfm_tagfilter() -> Result<(), String> {
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     gfm_tagfilter: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "&lt;iframe>",
@@ -99,9 +99,9 @@ javascript:/*--></title></style></textarea></script></xmp><svg/onload='+/"/+/onm
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     gfm_tagfilter: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         r###"&lt;title>
diff --git a/tests/gfm_task_list_item.rs b/tests/gfm_task_list_item.rs
index 0ef6ea3..7c68b21 100644
--- a/tests/gfm_task_list_item.rs
+++ b/tests/gfm_task_list_item.rs
@@ -3,20 +3,12 @@ use markdown::{
     mdast::{List, ListItem, Node, Paragraph, Root, Text},
     to_html, to_html_with_options, to_mdast,
     unist::Position,
-    Constructs, Options, ParseOptions,
+    Options, ParseOptions,
 };
 use pretty_assertions::assert_eq;
 
 #[test]
 fn gfm_task_list_item() -> Result<(), String> {
-    let gfm = Options {
-        parse: ParseOptions {
-            constructs: Constructs::gfm(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
-    };
-
     assert_eq!(
         to_html("* [x] y."),
         "<ul>\n<li>[x] y.</li>\n</ul>",
@@ -24,25 +16,25 @@ fn gfm_task_list_item() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_html_with_options("* [x] y.", &gfm)?,
+        to_html_with_options("* [x] y.", &Options::gfm())?,
         "<ul>\n<li><input type=\"checkbox\" disabled=\"\" checked=\"\" /> y.</li>\n</ul>",
         "should support task list item checks"
     );
 
     assert_eq!(
-        to_html_with_options("* [ ] z.", &gfm)?,
+        to_html_with_options("* [ ] z.", &Options::gfm())?,
         "<ul>\n<li><input type=\"checkbox\" disabled=\"\" /> z.</li>\n</ul>",
         "should support unchecked task list item checks"
     );
 
     assert_eq!(
-        to_html_with_options("*\n    [x]", &gfm)?,
+        to_html_with_options("*\n    [x]", &Options::gfm())?,
         "<ul>\n<li>[x]</li>\n</ul>",
         "should not support laziness (1)"
     );
 
     assert_eq!(
-        to_html_with_options("*\n[x]", &gfm)?,
+        to_html_with_options("*\n[x]", &Options::gfm())?,
         "<ul>\n<li></li>\n</ul>\n<p>[x]</p>",
         "should not support laziness (2)"
     );
@@ -129,7 +121,7 @@ EOL after:
 "###
             .replace('␠', " ")
             .replace('␉', "\t"),
-            &gfm
+            &Options::gfm()
         )?,
         r###"<ul>
 <li><input type="checkbox" disabled="" /> foo</li>
@@ -249,7 +241,7 @@ Text.</li>
     );
 
     assert_eq!(
-        to_mdast("* [x] a\n* [ ] b\n* c", &gfm.parse)?,
+        to_mdast("* [x] a\n* [ ] b\n* c", &ParseOptions::gfm())?,
         Node::Root(Root {
             children: vec![Node::List(List {
                 ordered: false,
diff --git a/tests/hard_break_escape.rs b/tests/hard_break_escape.rs
index 44fe6ca..bd6830c 100644
--- a/tests/hard_break_escape.rs
+++ b/tests/hard_break_escape.rs
@@ -54,9 +54,9 @@ fn hard_break_escape() -> Result<(), String> {
                         hard_break_escape: false,
                         ..Constructs::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>a\\\nb</p>",
@@ -64,7 +64,7 @@ fn hard_break_escape() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("a\\\nb.", &ParseOptions::default())?,
+        to_mdast("a\\\nb.", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![
diff --git a/tests/hard_break_trailing.rs b/tests/hard_break_trailing.rs
index 78f5550..ee8f7fc 100644
--- a/tests/hard_break_trailing.rs
+++ b/tests/hard_break_trailing.rs
@@ -118,11 +118,11 @@ fn hard_break_trailing() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         hard_break_trailing: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>a\nb</p>",
@@ -130,7 +130,7 @@ fn hard_break_trailing() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("a  \nb.", &ParseOptions::default())?,
+        to_mdast("a  \nb.", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![
diff --git a/tests/heading_atx.rs b/tests/heading_atx.rs
index 089c2c7..3edcb55 100644
--- a/tests/heading_atx.rs
+++ b/tests/heading_atx.rs
@@ -214,11 +214,11 @@ fn heading_atx() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         heading_atx: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p># a</p>",
@@ -226,7 +226,7 @@ fn heading_atx() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("## alpha #", &ParseOptions::default())?,
+        to_mdast("## alpha #", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Heading(Heading {
                 depth: 2,
diff --git a/tests/heading_setext.rs b/tests/heading_setext.rs
index ec8b056..8cf0863 100644
--- a/tests/heading_setext.rs
+++ b/tests/heading_setext.rs
@@ -281,11 +281,11 @@ fn heading_setext() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         heading_setext: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>a\n-</p>",
@@ -293,7 +293,7 @@ fn heading_setext() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("alpha\nbravo\n==", &ParseOptions::default())?,
+        to_mdast("alpha\nbravo\n==", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Heading(Heading {
                 depth: 1,
diff --git a/tests/html_flow.rs b/tests/html_flow.rs
index 41f6565..d79f031 100644
--- a/tests/html_flow.rs
+++ b/tests/html_flow.rs
@@ -13,9 +13,9 @@ fn html_flow() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -37,11 +37,11 @@ fn html_flow() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         html_flow: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>&lt;x&gt;</p>",
@@ -49,7 +49,7 @@ fn html_flow() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("<div>\nstuff\n</div>", &ParseOptions::default())?,
+        to_mdast("<div>\nstuff\n</div>", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Html(Html {
                 value: "<div>\nstuff\n</div>".into(),
@@ -69,9 +69,9 @@ fn html_flow_1_raw() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -241,9 +241,9 @@ fn html_flow_2_comment() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -350,9 +350,9 @@ fn html_flow_3_instruction() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -407,9 +407,9 @@ fn html_flow_4_declaration() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -472,9 +472,9 @@ fn html_flow_5_cdata() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -546,9 +546,9 @@ fn html_flow_6_basic() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -833,9 +833,9 @@ fn html_flow_7_complete() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/html_text.rs b/tests/html_text.rs
index 5537d3d..43d2cf2 100644
--- a/tests/html_text.rs
+++ b/tests/html_text.rs
@@ -13,9 +13,9 @@ fn html_text() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -434,11 +434,11 @@ to_html_with_options("<x> a", &danger)?,
                 parse: ParseOptions {
                     constructs: Constructs {
                         html_text: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>a &lt;x&gt;</p>",
@@ -446,7 +446,7 @@ to_html_with_options("<x> a", &danger)?,
     );
 
     assert_eq!(
-        to_mdast("alpha <i>bravo</b> charlie.", &ParseOptions::default())?,
+        to_mdast("alpha <i>bravo</b> charlie.", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
                 children: vec![
diff --git a/tests/image.rs b/tests/image.rs
index 3d53032..2fff14c 100644
--- a/tests/image.rs
+++ b/tests/image.rs
@@ -204,11 +204,11 @@ fn image() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         label_start_image: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>!<a href=\"\">x</a></p>",
@@ -227,9 +227,9 @@ fn image() -> Result<(), String> {
             &Options {
                 compile: CompileOptions {
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p><img src=\"javascript:alert(1)\" alt=\"\" /></p>",
@@ -239,7 +239,7 @@ fn image() -> Result<(), String> {
     assert_eq!(
         to_mdast(
             "a ![alpha]() b ![bravo](charlie 'delta') c.",
-            &ParseOptions::default()
+            &Default::default()
         )?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
@@ -279,7 +279,7 @@ fn image() -> Result<(), String> {
     assert_eq!(
         to_mdast(
             "[x]: y\n\na ![x] b ![x][] c ![d][x] e.",
-            &ParseOptions::default()
+            &Default::default()
         )?,
         Node::Root(Root {
             children: vec![
diff --git a/tests/link_reference.rs b/tests/link_reference.rs
index 3769fbc..310cf40 100644
--- a/tests/link_reference.rs
+++ b/tests/link_reference.rs
@@ -13,9 +13,9 @@ fn link_reference() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -397,11 +397,11 @@ fn link_reference() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         label_start_link: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>[x]()</p>",
@@ -415,11 +415,11 @@ fn link_reference() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         label_end: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>[x]()</p>",
@@ -427,10 +427,7 @@ fn link_reference() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast(
-            "[x]: y\n\na [x] b [x][] c [d][x] e.",
-            &ParseOptions::default()
-        )?,
+        to_mdast("[x]: y\n\na [x] b [x][] c [d][x] e.", &Default::default())?,
         Node::Root(Root {
             children: vec![
                 Node::Definition(Definition {
diff --git a/tests/link_resource.rs b/tests/link_resource.rs
index 5f9cddc..959d07f 100644
--- a/tests/link_resource.rs
+++ b/tests/link_resource.rs
@@ -3,7 +3,7 @@ use markdown::{
     mdast::{Link, Node, Paragraph, Root, Text},
     to_html, to_html_with_options, to_mdast,
     unist::Position,
-    CompileOptions, Options, ParseOptions,
+    CompileOptions, Options,
 };
 use pretty_assertions::assert_eq;
 
@@ -13,9 +13,9 @@ fn link_resource() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -469,7 +469,7 @@ fn link_resource() -> Result<(), String> {
     assert_eq!(
         to_mdast(
             "a [alpha]() b [bravo](charlie 'delta') c.",
-            &ParseOptions::default()
+            &Default::default()
         )?,
         Node::Root(Root {
             children: vec![Node::Paragraph(Paragraph {
diff --git a/tests/list.rs b/tests/list.rs
index 476361e..cb4019b 100644
--- a/tests/list.rs
+++ b/tests/list.rs
@@ -13,9 +13,9 @@ fn list() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -579,11 +579,11 @@ fn list() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         list_item: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>- one</p>\n<p>two</p>",
@@ -591,7 +591,7 @@ fn list() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("* a", &ParseOptions::default())?,
+        to_mdast("* a", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::List(List {
                 ordered: false,
@@ -617,7 +617,7 @@ fn list() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("3. a", &ParseOptions::default())?,
+        to_mdast("3. a", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::List(List {
                 ordered: true,
@@ -643,7 +643,7 @@ fn list() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("* a\n\n  b\n* c", &ParseOptions::default())?,
+        to_mdast("* a\n\n  b\n* c", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::List(List {
                 ordered: false,
diff --git a/tests/math_flow.rs b/tests/math_flow.rs
index b3ce669..18795ab 100644
--- a/tests/math_flow.rs
+++ b/tests/math_flow.rs
@@ -14,11 +14,11 @@ fn math_flow() -> Result<(), String> {
             constructs: Constructs {
                 math_text: true,
                 math_flow: true,
-                ..Constructs::default()
+                ..Default::default()
             },
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/math_text.rs b/tests/math_text.rs
index 892690b..4b6fb6a 100644
--- a/tests/math_text.rs
+++ b/tests/math_text.rs
@@ -14,11 +14,11 @@ fn math_text() -> Result<(), String> {
             constructs: Constructs {
                 math_text: true,
                 math_flow: true,
-                ..Constructs::default()
+                ..Default::default()
             },
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -41,12 +41,12 @@ fn math_text() -> Result<(), String> {
                     constructs: Constructs {
                         math_text: true,
                         math_flow: true,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
                     math_text_single_dollar: false,
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>$foo$ <code class=\"language-math math-inline\">bar</code></p>",
@@ -151,14 +151,14 @@ fn math_text() -> Result<(), String> {
                     constructs: Constructs {
                         math_text: true,
                         math_flow: true,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
                 compile: CompileOptions {
                     allow_dangerous_html: true,
                     allow_dangerous_protocol: true,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 }
             }
         )?,
diff --git a/tests/mdx_esm.rs b/tests/mdx_esm.rs
index 4d96b09..b64a5e9 100644
--- a/tests/mdx_esm.rs
+++ b/tests/mdx_esm.rs
@@ -16,9 +16,9 @@ fn mdx_esm() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/mdx_expression_flow.rs b/tests/mdx_expression_flow.rs
index fe07743..4281e5d 100644
--- a/tests/mdx_expression_flow.rs
+++ b/tests/mdx_expression_flow.rs
@@ -12,11 +12,8 @@ use test_utils::swc::{parse_esm, parse_expression};
 #[test]
 fn mdx_expression_flow_agnostic() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
@@ -39,11 +36,11 @@ fn mdx_expression_flow_agnostic() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         mdx_expression_flow: true,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<pre><code>{}\n</code></pre>",
@@ -57,11 +54,11 @@ fn mdx_expression_flow_agnostic() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         mdx_expression_flow: true,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "",
@@ -149,9 +146,9 @@ fn mdx_expression_flow_gnostic() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -224,9 +221,9 @@ fn mdx_expression_spread() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/mdx_expression_text.rs b/tests/mdx_expression_text.rs
index 61f5170..4ab26dd 100644
--- a/tests/mdx_expression_text.rs
+++ b/tests/mdx_expression_text.rs
@@ -16,9 +16,9 @@ fn mdx_expression_text_gnostic_core() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -149,11 +149,8 @@ fn mdx_expression_text_gnostic_core() -> Result<(), String> {
 #[test]
 fn mdx_expression_text_agnostic() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
@@ -236,9 +233,9 @@ fn mdx_expression_text_gnostic() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/mdx_jsx_flow.rs b/tests/mdx_jsx_flow.rs
index 337b4cd..219b0b5 100644
--- a/tests/mdx_jsx_flow.rs
+++ b/tests/mdx_jsx_flow.rs
@@ -10,11 +10,8 @@ use pretty_assertions::assert_eq;
 #[test]
 fn mdx_jsx_flow_agnostic() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
@@ -32,11 +29,11 @@ fn mdx_jsx_flow_agnostic() -> Result<(), String> {
                     constructs: Constructs {
                         html_flow: false,
                         mdx_jsx_flow: true,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<pre><code>&lt;a /&gt;\n</code></pre>",
@@ -51,11 +48,11 @@ fn mdx_jsx_flow_agnostic() -> Result<(), String> {
                     constructs: Constructs {
                         html_flow: false,
                         mdx_jsx_flow: true,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "",
@@ -94,11 +91,8 @@ fn mdx_jsx_flow_agnostic() -> Result<(), String> {
 #[test]
 fn mdx_jsx_flow_essence() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/mdx_jsx_text.rs b/tests/mdx_jsx_text.rs
index d6e3d56..a64df64 100644
--- a/tests/mdx_jsx_text.rs
+++ b/tests/mdx_jsx_text.rs
@@ -15,11 +15,8 @@ use test_utils::swc::{parse_esm, parse_expression};
 #[test]
 fn mdx_jsx_text_core() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
@@ -487,11 +484,8 @@ fn mdx_jsx_text_core() -> Result<(), String> {
 #[test]
 fn mdx_jsx_text_agnosic() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
@@ -534,9 +528,9 @@ fn mdx_jsx_text_gnostic() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
@@ -631,11 +625,8 @@ fn mdx_jsx_text_gnostic() -> Result<(), String> {
 #[test]
 fn mdx_jsx_text_complete() -> Result<(), String> {
     let mdx = Options {
-        parse: ParseOptions {
-            constructs: Constructs::mdx(),
-            ..ParseOptions::default()
-        },
-        ..Options::default()
+        parse: ParseOptions::mdx(),
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/mdx_swc.rs b/tests/mdx_swc.rs
index ed9bc60..a24864f 100644
--- a/tests/mdx_swc.rs
+++ b/tests/mdx_swc.rs
@@ -11,9 +11,9 @@ fn mdx_swc() -> Result<(), String> {
             constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/misc_dangerous_html.rs b/tests/misc_dangerous_html.rs
index 6de045f..0610d23 100644
--- a/tests/misc_dangerous_html.rs
+++ b/tests/misc_dangerous_html.rs
@@ -8,9 +8,9 @@ fn dangerous_html() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/misc_default_line_ending.rs b/tests/misc_default_line_ending.rs
index 306b1bc..65c5867 100644
--- a/tests/misc_default_line_ending.rs
+++ b/tests/misc_default_line_ending.rs
@@ -34,9 +34,9 @@ fn default_line_ending() -> Result<(), String> {
             &Options {
                 compile: CompileOptions {
                     default_line_ending: LineEnding::CarriageReturn,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<blockquote>\r<p>a</p>\r</blockquote>",
@@ -49,9 +49,9 @@ fn default_line_ending() -> Result<(), String> {
             &Options {
                 compile: CompileOptions {
                     default_line_ending: LineEnding::CarriageReturn,
-                    ..CompileOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         // To do: is this a bug in `to_html.js` that it uses `\r` for earlier line endings?
diff --git a/tests/misc_line_ending.rs b/tests/misc_line_ending.rs
index 52b84d8..ed91265 100644
--- a/tests/misc_line_ending.rs
+++ b/tests/misc_line_ending.rs
@@ -8,9 +8,9 @@ fn line_ending() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(to_html("\n"), "", "should support just a line feed");
diff --git a/tests/misc_tabs.rs b/tests/misc_tabs.rs
index 5de8de2..681f0b2 100644
--- a/tests/misc_tabs.rs
+++ b/tests/misc_tabs.rs
@@ -8,9 +8,9 @@ fn tabs_flow() -> Result<(), String> {
         compile: CompileOptions {
             allow_dangerous_html: true,
             allow_dangerous_protocol: true,
-            ..CompileOptions::default()
+            ..Default::default()
         },
-        ..Options::default()
+        ..Default::default()
     };
 
     assert_eq!(
diff --git a/tests/thematic_break.rs b/tests/thematic_break.rs
index 735829d..35fa2e0 100644
--- a/tests/thematic_break.rs
+++ b/tests/thematic_break.rs
@@ -178,11 +178,11 @@ fn thematic_break() -> Result<(), String> {
                 parse: ParseOptions {
                     constructs: Constructs {
                         thematic_break: false,
-                        ..Constructs::default()
+                        ..Default::default()
                     },
-                    ..ParseOptions::default()
+                    ..Default::default()
                 },
-                ..Options::default()
+                ..Default::default()
             }
         )?,
         "<p>***</p>",
@@ -190,7 +190,7 @@ fn thematic_break() -> Result<(), String> {
     );
 
     assert_eq!(
-        to_mdast("***", &ParseOptions::default())?,
+        to_mdast("***", &Default::default())?,
         Node::Root(Root {
             children: vec![Node::ThematicBreak(ThematicBreak {
                 position: Some(Position::new(1, 1, 0, 1, 4, 3))
diff --git a/tests/xxx_mdx_plugin_recma_document.rs b/tests/xxx_mdx_plugin_recma_document.rs
index de25699..9fdd053 100644
--- a/tests/xxx_mdx_plugin_recma_document.rs
+++ b/tests/xxx_mdx_plugin_recma_document.rs
@@ -3,7 +3,7 @@ extern crate swc_common;
 extern crate swc_ecma_ast;
 extern crate swc_ecma_codegen;
 mod test_utils;
-use markdown::{to_mdast, Constructs, Location, ParseOptions};
+use markdown::{to_mdast, Location, ParseOptions};
 use pretty_assertions::assert_eq;
 use test_utils::{
     hast_util_to_swc::hast_util_to_swc,
@@ -17,10 +17,9 @@ fn from_markdown(value: &str) -> Result<String, String> {
     let mdast = to_mdast(
         value,
         &ParseOptions {
-            constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..ParseOptions::mdx()
         },
     )?;
     let hast = mdast_util_to_hast(&mdast);
diff --git a/tests/xxx_mdx_plugin_recma_jsx_rewrite.rs b/tests/xxx_mdx_plugin_recma_jsx_rewrite.rs
index 9b9a4bc..d78e5c8 100644
--- a/tests/xxx_mdx_plugin_recma_jsx_rewrite.rs
+++ b/tests/xxx_mdx_plugin_recma_jsx_rewrite.rs
@@ -3,7 +3,7 @@ extern crate swc_common;
 extern crate swc_ecma_ast;
 extern crate swc_ecma_codegen;
 mod test_utils;
-use markdown::{to_mdast, Constructs, Location, ParseOptions};
+use markdown::{to_mdast, Location, ParseOptions};
 use pretty_assertions::assert_eq;
 use test_utils::{
     hast_util_to_swc::hast_util_to_swc,
@@ -18,10 +18,9 @@ fn from_markdown(value: &str, options: &RewriteOptions) -> Result<String, String
     let mdast = to_mdast(
         value,
         &ParseOptions {
-            constructs: Constructs::mdx(),
             mdx_esm_parse: Some(Box::new(parse_esm)),
             mdx_expression_parse: Some(Box::new(parse_expression)),
-            ..ParseOptions::default()
+            ..ParseOptions::mdx()
         },
     )?;
     let hast = mdast_util_to_hast(&mdast);