diff --git a/python/paddle/fluid/tests/unittests/test_mean_op.py b/python/paddle/fluid/tests/unittests/test_mean_op.py
index 3799640b98800f660e72e3c8b4580949d5deb12a..a2befb4a29a0f39d6d51c1a869c129889ec18015 100644
--- a/python/paddle/fluid/tests/unittests/test_mean_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mean_op.py
@@ -86,6 +86,7 @@ class TestMeanAPI(unittest.TestCase):
             else paddle.CPUPlace()
 
     def test_api_static(self):
+        paddle.enable_static()
         with paddle.static.program_guard(paddle.static.Program()):
             x = paddle.data('X', self.x_shape)
             out1 = paddle.mean(x)
@@ -102,7 +103,9 @@ class TestMeanAPI(unittest.TestCase):
         for out in res:
             self.assertEqual(np.allclose(out, out_ref), True)
 
-    def test_api_imperative(self):
+    def test_api_dygraph(self):
+        paddle.disable_static(self.place)
+
         def test_case(x, axis=None, keepdim=False):
             x_tensor = paddle.to_variable(x)
             out = paddle.mean(x_tensor, axis, keepdim)
@@ -113,7 +116,6 @@ class TestMeanAPI(unittest.TestCase):
             out_ref = np.mean(x, axis, keepdims=keepdim)
             self.assertEqual(np.allclose(out.numpy(), out_ref), True)
 
-        paddle.disable_static(self.place)
         test_case(self.x)
         test_case(self.x, [])
         test_case(self.x, -1)
@@ -125,6 +127,7 @@ class TestMeanAPI(unittest.TestCase):
         paddle.enable_static()
 
     def test_errors(self):
+        paddle.enable_static()
         with paddle.static.program_guard(paddle.static.Program()):
             x = paddle.data('X', [10, 12], 'int8')
             self.assertRaises(TypeError, paddle.mean, x)