diff --git a/GPy/testing/rv_transformation_tests.py b/GPy/testing/rv_transformation_tests.py
index bd721246..aa36349e 100644
--- a/GPy/testing/rv_transformation_tests.py
+++ b/GPy/testing/rv_transformation_tests.py
@@ -57,7 +57,7 @@ class RVTransformationTestCase(unittest.TestCase):
         self.assertTrue(np.linalg.norm(pdf_phi - kde(phi)) / np.linalg.norm(kde(phi)) <= 1e-1)
         # Check the gradients at a few random points
         for i in range(5):
-            m.theta = theta_s[i]
+            m.theta = 1./(5+i)
             self.assertTrue(m.checkgrad(verbose=True))
 
     def test_Logexp(self):