diff --git a/tests/test_lighting.py b/tests/test_lighting.py
index 37d8653a..6dcc1ba6 100644
--- a/tests/test_lighting.py
+++ b/tests/test_lighting.py
@@ -469,7 +469,7 @@ class TestSpecularLighting(TestCaseMixin, unittest.TestCase):
         top K faces per pixel.
         """
         device = torch.device("cuda:0")
-        N, H, W, K = 16, 256, 256, 100
+        N, H, W, K = 8, 128, 128, 100
         color = torch.tensor([1, 0, 1], dtype=torch.float32, device=device)
         direction = torch.tensor(
             [-1 / np.sqrt(2), 1 / np.sqrt(2), 0], dtype=torch.float32