diff --git a/test/test_fake_quant.py b/test/test_fake_quant.py
index b8d8dbb5dba1e..26917808f23b7 100644
--- a/test/test_fake_quant.py
+++ b/test/test_fake_quant.py
@@ -10,7 +10,7 @@
 # Reference method for quantizing a tensor.
 def _fake_quantize_per_tensor_affine_reference(X, scale, zero_point, num_bits):
     quant_min, quant_max = 0, 2 ** num_bits - 1
-    res = (np.clip(np.round(X / scale) + zero_point, quant_min, quant_max) - zero_point) * scale
+    res = (np.clip(np.round(X / scale)+zero_point, quant_min, quant_max) - zero_point) * scale
     res = res.reshape(X.shape)
     return res