diff --git a/test/backend/test_arange.py b/test/backend/test_arange.py
index c07c999b6f..faa8b48137 100644
--- a/test/backend/test_arange.py
+++ b/test/backend/test_arange.py
@@ -19,6 +19,7 @@ class TestArange(unittest.TestCase):
     self.assertEqual(self._get_flops(Tensor.arange(256), np.arange(256)), 0)
     self.assertEqual(self._get_flops(Tensor.arange(2560), np.arange(2560)), 0)
 
+  @unittest.skipIf(Device.DEFAULT == "CL", "flaky in CI")
   def test_arange_cumsum(self):
     np.testing.assert_equal(Tensor.arange(513).cumsum(0).numpy(), np.arange(513).cumsum())