diff --git a/tests/keras_contrib/callbacks/dead_relu_detector_test.py b/tests/keras_contrib/callbacks/dead_relu_detector_test.py
index e4a1783..4026890 100644
--- a/tests/keras_contrib/callbacks/dead_relu_detector_test.py
+++ b/tests/keras_contrib/callbacks/dead_relu_detector_test.py
@@ -21,7 +21,7 @@ def check_print(do_train, expected_warnings, nr_dead=None, perc_dead=None):
     :param nr_dead: int
     :param perc_dead: float, 10% should be written as 0.1
     """
-    
+
     saved_stdout = sys.stdout
 
     out = StringIO()