diff --git a/GPy/testing/rv_transformation_tests.py b/GPy/testing/rv_transformation_tests.py
index e00ec563..3bf81d9b 100644
--- a/GPy/testing/rv_transformation_tests.py
+++ b/GPy/testing/rv_transformation_tests.py
@@ -64,7 +64,7 @@ class RVTransformationTestCase(unittest.TestCase):
             if not m.checkgrad():
                 checks_failed += 1.
                 m.checkgrad(1)
-        self.assertTrue(checks_failed/float(checks) > .7)
+        self.assertTrue(checks_failed/float(checks) <= .3)
             
             
     def test_Logexp(self):