diff --git a/test/test_wrapper.py b/test/test_wrapper.py
index 44db7b58e0b9b38563a1ea6bd86e41c8d0bfefe3..40771c2c3df31b15e1b7ac17c3ac26c63a651a33 100644
--- a/test/test_wrapper.py
+++ b/test/test_wrapper.py
@@ -266,7 +266,13 @@ class TestCL:
         a_result = np.empty_like(a)
         cl.enqueue_copy(queue, a_result, a_dest)
 
-        assert la.norm(a_result - a) == 0
+        good = la.norm(a_result - a) == 0
+        if not good:
+            if queue.device.type == cl.device_type.CPU:
+                assert good, ("The image implementation on your CPU CL platform '%s' "
+                        "returned bad values. This is bad, but common." % queue.device.platform)
+            else:
+                assert good
 
     @pytools.test.mark_test.opencl
     def test_copy_buffer(self, ctx_factory):