diff --git a/tests.py b/tests.py
index 2a64cb9..ab2d2af 100644
--- a/tests.py
+++ b/tests.py
@@ -22,6 +22,7 @@ class KagefuncTests(unittest.TestCase):
         # request a frame to see if that errors
         mask.get_frame(0)
 
+    @unittest.skip("no OpenCL support in nix build sandbox")
     def test_inverse_scale(self):
         src = self.BLACK_SAMPLE_CLIP
         resized = kgf.inverse_scale(self.GREYSCALE_SAMPLE_CLIP, height=90)