diff --git a/sklearn/utils/testing.py b/sklearn/utils/testing.py
index f0a7f539b0494a39d3ef54b4e626f63f1bf8ae08..a4df199db04a02bae6b123bda0e69f98c5039409 100644
--- a/sklearn/utils/testing.py
+++ b/sklearn/utils/testing.py
@@ -28,8 +28,9 @@ def _assert_less(a, b, msg=None):
         message += ": " + msg
     assert a < b, message
 
+
 def _assert_greater(a, b, msg=None):
-    message = "%r is not lower than %r" % (a, b)
+    message = "%r is not greater than %r" % (a, b)
     if msg is not None:
         message += ": " + msg
     assert a > b, message