diff --git a/test/fixtures/b/a/vulnerable.js b/test/fixtures/b/a/vulnerable.js
new file mode 100644
index 00000000..9d5aa267
--- /dev/null
+++ b/test/fixtures/b/a/vulnerable.js
@@ -0,0 +1 @@
+const vulnerableRegex = /^_(__|.)+_$/;