diff --git a/pandas/tests/frame/test_analytics.py b/pandas/tests/frame/test_analytics.py
index ebb585848be7a2..0da48ea07e4057 100644
--- a/pandas/tests/frame/test_analytics.py
+++ b/pandas/tests/frame/test_analytics.py
@@ -1656,7 +1656,7 @@ def test_duplicated_inverse_large(self, subset, keep):
 
     @pytest.mark.parametrize('keep', ['first', 'last'])
     def test_duplicated_inverse_fastpath(self, keep):
-        df = DataFrame({'A' : range(10)})  # no duplicates
+        df = DataFrame({'A': range(10)})  # no duplicates
 
         expected_isdup = df.duplicated(keep=keep)
         result_isdup, result_inv = df.duplicated(keep=keep,