diff --git a/test/grammar/pattern_test.py b/test/grammar/pattern_test.py
index 91094fad..c651baf3 100644
--- a/test/grammar/pattern_test.py
+++ b/test/grammar/pattern_test.py
@@ -22,7 +22,7 @@ def test_patterns_with_newlines(self):
 
             blankline
                 =
-                /^[^\\n]*\\n$/
+                /(?m)^[^\\n]*\\n$/
                 ;
         """