diff --git a/python/paddle/fluid/tests/unittests/test_affine_channel_op.py b/python/paddle/fluid/tests/unittests/test_affine_channel_op.py
index 96a16c07766af985c9f66ad765d535ec042c7306..fab2d02bb52589c99693e637fab5128c9d0e7d56 100644
--- a/python/paddle/fluid/tests/unittests/test_affine_channel_op.py
+++ b/python/paddle/fluid/tests/unittests/test_affine_channel_op.py
@@ -123,7 +123,7 @@ class TestAffineChannel2D(TestAffineChannelOp):
         return
 
     def test_check_grad_stopgrad_dscale_dbias(self):
-	print('test pr 26623')
+        print('test pr 26623')
         return