diff --git a/test/pathological.js b/test/pathological.js
index a64a10e..4f0b82b 100644
--- a/test/pathological.js
+++ b/test/pathological.js
@@ -101,6 +101,10 @@ describe('Pathological sequences speed', () => {
       await test_pattern('[ (]('.repeat(40000));
     });
 
+    it('pattern ![[]() repeated', async () => {
+      await test_pattern('![[]()'.repeat(20000));
+    });
+
     it('nested brackets', async () => {
       await test_pattern('['.repeat(20000) + 'a' + ']'.repeat(20000));
     });
@@ -124,6 +128,10 @@ describe('Pathological sequences speed', () => {
     it('unclosed links B', async () => {
       await test_pattern('[a](b'.repeat(30000));
     });
+
+    it('unclosed <!--', async () => {
+      await test_pattern('</' + '<!--'.repeat(100000));
+    });
   });
 
   describe('Markdown-it', () => {
diff --git a/test/pathological.json b/test/pathological.json
index dc0c623..dee307c 100644
--- a/test/pathological.json
+++ b/test/pathological.json
@@ -1 +1 @@
-{ "md5": "da7a30ea2886aea813e50c2764ecc40f" }
+{ "md5": "68c7c28fe0d4a34367f27dcbceec9fed" }