diff --git a/test/pathological.js b/test/pathological.js
index af3f90f1a..f8c69047e 100644
--- a/test/pathological.js
+++ b/test/pathological.js
@@ -81,6 +81,10 @@ describe('Pathological sequences speed', () => {
       await test_pattern('*a_ '.repeat(50000));
     });
 
+    it('commonmark/cmark#389', async () => {
+      await test_pattern('*a '.repeat(20000) + '_a*_ '.repeat(20000));
+    });
+
     it('openers and closers multiple of 3', async () => {
       await test_pattern('a**b' + ('c* '.repeat(50000)));
     });
diff --git a/test/pathological.json b/test/pathological.json
index d44b8edf2..7339947ad 100644
--- a/test/pathological.json
+++ b/test/pathological.json
@@ -1 +1 @@
-{ "md5": "16f68052e677d03910d777af610e965d" }
+{ "md5": "10730e0b6dec7355412bb632e9eb1d98" }