1 files changed, 5 insertions, 0 deletions
diff --git a/askama_derive/src/parser.rs b/askama_derive/src/parser.rs
index 8b5ec4e..d466379 100644
--- a/askama_derive/src/parser.rs
+++ b/askama_derive/src/parser.rs
@@ -398,4 +398,9 @@ mod tests {
         check_ws_split("b\n", &("", "b", "\n"));
         check_ws_split(" \t\r\n", &(" \t\r\n", "", ""));
     }
+    #[test]
+    #[should_panic]
+    fn test_invalid_block() {
+        super::parse("{% extend \"blah\" %}");
+    }
 }