Added axis
diff --git a/tensorflow/python/ops/math_ops_test.py b/tensorflow/python/ops/math_ops_test.py
index ce2d7e9..11dbfd0 100644
--- a/tensorflow/python/ops/math_ops_test.py
+++ b/tensorflow/python/ops/math_ops_test.py
@@ -100,7 +100,8 @@
       [5., 9., 2.],
       [5.],
       []])
-    self.assertAllClose(math_ops.reduce_variance(x), [0., 16., 1., 0.])
+    self.assertAllClose(math_ops.reduce_variance(x, axis=0),
+      [0., 16., 1., 0.])
 
   def testReduceVarComplex(self):
     # Ensure that complex values are handled to be consistent with numpy