diff --git a/tests/basic/test_watch.py b/tests/basic/test_watch.py
index 706fd1ade..524f80e08 100644
--- a/tests/basic/test_watch.py
+++ b/tests/basic/test_watch.py
@@ -155,3 +155,12 @@ def test_ai_comment_pattern():
     assert (
         question_js_has_bang == "?"
     ), "Expected at least one bang (!) comment in watch_question.js fixture"
+    
+    # Test Lisp fixture
+    lisp_path = fixtures_dir / "watch.lisp"
+    lisp_lines, lisp_comments, lisp_has_bang = watcher.get_ai_comments(str(lisp_path))
+    lisp_expected = 7
+    assert (
+        len(lisp_lines) == lisp_expected
+    ), f"Expected {lisp_expected} AI comments in Lisp fixture, found {len(lisp_lines)}"
+    assert lisp_has_bang == "!", "Expected at least one bang (!) comment in Lisp fixture"
diff --git a/tests/fixtures/watch.lisp b/tests/fixtures/watch.lisp
new file mode 100644
index 000000000..1aae8fb8f
--- /dev/null
+++ b/tests/fixtures/watch.lisp
@@ -0,0 +1,19 @@
+(defun hello-world ()
+  ;; ai this is a simple hello world function
+  (format t "Hello, World!"))
+
+(defun add (a b)
+  ; ai! fix this function to handle nil values
+  (+ a b))
+
+(defun multiply (a b)
+  ;;; ai? why is this function not working with large numbers?
+  (* a b))
+
+; ai this is a single semicolon comment
+
+;; ai this is a double semicolon comment
+
+;;; ai this is a triple semicolon comment
+
+;;;; ai! this is a quadruple semicolon comment