diff --git a/tests/custom_op/test_im2col.py b/tests/custom_op/test_im2col.py
index 946653d671043c9272305588d4304e06b69da3c4..0b148145bd6f7d9819e4b72da5333d2556de94e4 100644
--- a/tests/custom_op/test_im2col.py
+++ b/tests/custom_op/test_im2col.py
@@ -46,7 +46,7 @@ def execution_im2col(x, idt, k, stride, ifm_ch, ifm_dim, pad_amt=0, pad_val=0):
     )
 
     graph = helper.make_graph(
-        nodes=[Im2Col_node], name="im2col_graph", inputs=[inp], outputs=[outp],
+        nodes=[Im2Col_node], name="im2col_graph", inputs=[inp], outputs=[outp]
     )
 
     model = helper.make_model(graph, producer_name="im2col-model")
@@ -175,19 +175,19 @@ def test_im2col():
         [
             [
                 [
-                    [1.0, 2.0, 5.0, 6.0, -1.0, -2.0, -5.0, -6.0],
-                    [2.0, 3.0, 6.0, 7.0, -2.0, -3.0, -6.0, -7.0],
-                    [3.0, 4.0, 7.0, 8.0, -3.0, -4.0, -7.0, -8.0],
+                    [1.0, -1.0, 2.0, -2.0, 5.0, -5.0, 6.0, -6.0],
+                    [2.0, -2.0, 3.0, -3.0, 6.0, -6.0, 7.0, -7.0],
+                    [3.0, -3.0, 4.0, -4.0, 7.0, -7.0, 8.0, -8.0],
                 ],
                 [
-                    [5.0, 6.0, 9.0, 10.0, -5.0, -6.0, -9.0, -10.0],
-                    [6.0, 7.0, 10.0, 11.0, -6.0, -7.0, -10.0, -11.0],
-                    [7.0, 8.0, 11.0, 12.0, -7.0, -8.0, -11.0, -12.0],
+                    [5.0, -5.0, 6.0, -6.0, 9.0, -9.0, 10.0, -10.0],
+                    [6.0, -6.0, 7.0, -7.0, 10.0, -10.0, 11.0, -11.0],
+                    [7.0, -7.0, 8.0, -8.0, 11.0, -11.0, 12.0, -12.0],
                 ],
                 [
-                    [9.0, 10.0, 13.0, 14.0, -9.0, -10.0, -13.0, -14.0],
-                    [10.0, 11.0, 14.0, 15.0, -10.0, -11.0, -14.0, -15.0],
-                    [11.0, 12.0, 15.0, 16.0, -11.0, -12.0, -15.0, -16.0],
+                    [9.0, -9.0, 10.0, -10.0, 13.0, -13.0, 14.0, -14.0],
+                    [10.0, -10.0, 11.0, -11.0, 14.0, -14.0, 15.0, -15.0],
+                    [11.0, -11.0, 12.0, -12.0, 15.0, -15.0, 16.0, -16.0],
                 ],
             ]
         ],
@@ -222,39 +222,39 @@ def test_im2col():
         [
             [
                 [
-                    [0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, -1.0],
-                    [0.0, 0.0, 1.0, 2.0, 0.0, 0.0, -1.0, -2.0],
-                    [0.0, 0.0, 2.0, 3.0, 0.0, 0.0, -2.0, -3.0],
-                    [0.0, 0.0, 3.0, 4.0, 0.0, 0.0, -3.0, -4.0],
-                    [0.0, 0.0, 4.0, 0.0, 0.0, 0.0, -4.0, 0.0],
+                    [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, -1.0],
+                    [0.0, 0.0, 0.0, 0.0, 1.0, -1.0, 2.0, -2.0],
+                    [0.0, 0.0, 0.0, 0.0, 2.0, -2.0, 3.0, -3.0],
+                    [0.0, 0.0, 0.0, 0.0, 3.0, -3.0, 4.0, -4.0],
+                    [0.0, 0.0, 0.0, 0.0, 4.0, -4.0, 0.0, 0.0],
                 ],
                 [
-                    [0.0, 1.0, 0.0, 5.0, 0.0, -1.0, 0.0, -5.0],
-                    [1.0, 2.0, 5.0, 6.0, -1.0, -2.0, -5.0, -6.0],
-                    [2.0, 3.0, 6.0, 7.0, -2.0, -3.0, -6.0, -7.0],
-                    [3.0, 4.0, 7.0, 8.0, -3.0, -4.0, -7.0, -8.0],
-                    [4.0, 0.0, 8.0, 0.0, -4.0, 0.0, -8.0, 0.0],
+                    [0.0, 0.0, 1.0, -1.0, 0.0, 0.0, 5.0, -5.0],
+                    [1.0, -1.0, 2.0, -2.0, 5.0, -5.0, 6.0, -6.0],
+                    [2.0, -2.0, 3.0, -3.0, 6.0, -6.0, 7.0, -7.0],
+                    [3.0, -3.0, 4.0, -4.0, 7.0, -7.0, 8.0, -8.0],
+                    [4.0, -4.0, 0.0, 0.0, 8.0, -8.0, 0.0, 0.0],
                 ],
                 [
-                    [0.0, 5.0, 0.0, 9.0, 0.0, -5.0, 0.0, -9.0],
-                    [5.0, 6.0, 9.0, 10.0, -5.0, -6.0, -9.0, -10.0],
-                    [6.0, 7.0, 10.0, 11.0, -6.0, -7.0, -10.0, -11.0],
-                    [7.0, 8.0, 11.0, 12.0, -7.0, -8.0, -11.0, -12.0],
-                    [8.0, 0.0, 12.0, 0.0, -8.0, 0.0, -12.0, 0.0],
+                    [0.0, 0.0, 5.0, -5.0, 0.0, 0.0, 9.0, -9.0],
+                    [5.0, -5.0, 6.0, -6.0, 9.0, -9.0, 10.0, -10.0],
+                    [6.0, -6.0, 7.0, -7.0, 10.0, -10.0, 11.0, -11.0],
+                    [7.0, -7.0, 8.0, -8.0, 11.0, -11.0, 12.0, -12.0],
+                    [8.0, -8.0, 0.0, 0.0, 12.0, -12.0, 0.0, 0.0],
                 ],
                 [
-                    [0.0, 9.0, 0.0, 13.0, 0.0, -9.0, 0.0, -13.0],
-                    [9.0, 10.0, 13.0, 14.0, -9.0, -10.0, -13.0, -14.0],
-                    [10.0, 11.0, 14.0, 15.0, -10.0, -11.0, -14.0, -15.0],
-                    [11.0, 12.0, 15.0, 16.0, -11.0, -12.0, -15.0, -16.0],
-                    [12.0, 0.0, 16.0, 0.0, -12.0, 0.0, -16.0, 0.0],
+                    [0.0, 0.0, 9.0, -9.0, 0.0, 0.0, 13.0, -13.0],
+                    [9.0, -9.0, 10.0, -10.0, 13.0, -13.0, 14.0, -14.0],
+                    [10.0, -10.0, 11.0, -11.0, 14.0, -14.0, 15.0, -15.0],
+                    [11.0, -11.0, 12.0, -12.0, 15.0, -15.0, 16.0, -16.0],
+                    [12.0, -12.0, 0.0, 0.0, 16.0, -16.0, 0.0, 0.0],
                 ],
                 [
-                    [0.0, 13.0, 0.0, 0.0, 0.0, -13.0, 0.0, 0.0],
-                    [13.0, 14.0, 0.0, 0.0, -13.0, -14.0, 0.0, 0.0],
-                    [14.0, 15.0, 0.0, 0.0, -14.0, -15.0, 0.0, 0.0],
-                    [15.0, 16.0, 0.0, 0.0, -15.0, -16.0, 0.0, 0.0],
-                    [16.0, 0.0, 0.0, 0.0, -16.0, 0.0, 0.0, 0.0],
+                    [0.0, 0.0, 13.0, -13.0, 0.0, 0.0, 0.0, 0.0],
+                    [13.0, -13.0, 14.0, -14.0, 0.0, 0.0, 0.0, 0.0],
+                    [14.0, -14.0, 15.0, -15.0, 0.0, 0.0, 0.0, 0.0],
+                    [15.0, -15.0, 16.0, -16.0, 0.0, 0.0, 0.0, 0.0],
+                    [16.0, -16.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
                 ],
             ]
         ],
@@ -281,7 +281,7 @@ def test_im2col_infer_shapes():
         "outp", TensorProto.FLOAT, [1, ofm_dim, ofm_dim, k * k * ifm_ch]
     )
 
-    abs_node = helper.make_node("Abs", inputs=["inp"], outputs=["abs"],)
+    abs_node = helper.make_node("Abs", inputs=["inp"], outputs=["abs"])
 
     Im2Col_node = helper.make_node(
         "Im2Col",
@@ -293,7 +293,7 @@ def test_im2col_infer_shapes():
         input_shape="(1,{},{},{})".format(ifm_dim, ifm_dim, ifm_ch),
     )
 
-    abs1_node = helper.make_node("Abs", inputs=["im2col"], outputs=["outp"],)
+    abs1_node = helper.make_node("Abs", inputs=["im2col"], outputs=["outp"])
 
     graph = helper.make_graph(
         nodes=[abs_node, Im2Col_node, abs1_node],