diff --git a/python/paddle/fluid/tests/unittests/test_conv2d_op.py b/python/paddle/fluid/tests/unittests/test_conv2d_op.py
index 1783fa65d5cdfe9f0b2f2b46ebe9ab6fe0e6015a..dfc98c2f471f5f3fe9da8e015686cc40c0186845 100644
--- a/python/paddle/fluid/tests/unittests/test_conv2d_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv2d_op.py
@@ -94,7 +94,7 @@ class TestConv2dOp(OpTest):
             input2 = np.maximum(input, 0.0)
         else:
             input2 = input
-        filter = np.random.random(self.filter_size).astype(self.dtype)
+        filter = np.random.uniform(-1, 1, self.filter_size).astype(self.dtype)
         output, _, _, _, _ = conv2d_forward_naive(input2, filter, self.groups,
                                                   conv2d_param)
         output = output.astype(self.dtype)