diff --git a/tests/test_flip_image.py b/tests/test_flip_image.py
index bfce6b750f378d9667efad47675a59dc77c04cb5..2b8c68f0c2b50cbd429201c30da51a28408fbd6f 100644
--- a/tests/test_flip_image.py
+++ b/tests/test_flip_image.py
@@ -15,7 +15,3 @@ class FlipImageTestCase(unittest.TestCase):
         # the code fails for 1D array
         with self.assertRaises(AssertionError):
             flip_image(np.array([1, 2, 3, 4]))
-
-
-if __name__ == "__main__":
-    unittest.main()