diff --git a/test/test_parser/test_fast_parser.py b/test/test_parser/test_fast_parser.py
index 10e1deeb..73bc80a9 100644
--- a/test/test_parser/test_fast_parser.py
+++ b/test/test_parser/test_fast_parser.py
@@ -346,7 +346,7 @@ def test_wrong_indentation():
 
 def test_open_parentheses():
     func = 'def func():\n a'
-    p = FastParser(load_grammar(), 'isinstance(\n\n' + func)
+    p = FastParser(load_grammar(), u('isinstance(\n\n' + func))
     # As you can see, the isinstance call cannot be seen anymore after
     # get_code, because it isn't valid code.
     assert p.module.get_code() == '\n\n' + func