diff --git a/GPy/testing/rv_transformation_tests.py b/GPy/testing/rv_transformation_tests.py
index fbf20c28..59c79044 100644
--- a/GPy/testing/rv_transformation_tests.py
+++ b/GPy/testing/rv_transformation_tests.py
@@ -62,6 +62,7 @@ class RVTransformationTestCase(unittest.TestCase):
         m.theta.set_prior(prior)
         m.theta.constrain(trans)
         m.randomize()
+        print(m)
         self.assertTrue(m.checkgrad(1))
 
     def test_Logexp(self):