use assertLess

tests/test_flip_image.py

@@ -36,9 +36,9 @@ class FlipImageTestCase(unittest.TestCase):
             delimiter=",",
             dtype=int,
         )
-        self.assertEqual(
-            flip_image(image_input),
-            image_answer,
+        self.assertLess(
+            np.linalg.norm(flip_image(image_input) - image_answer),
+            1e-6,
             "Test flip image on server failed",
         )