diff --git a/tests/test_string.py b/tests/test_string.py
index f25b4dd..9652d50 100644
--- a/tests/test_string.py
+++ b/tests/test_string.py
@@ -52,7 +52,7 @@ def test_common_suffix():
 
 def test_sort():
     assert sort('abc21') == '12abc'
-    assert sort('abc21',reversed=True) == 'cba21'
+    assert sort('abc21', reverse=True) == 'cba21'