diff --git a/GPy/testing/rv_transformation_tests.py b/GPy/testing/rv_transformation_tests.py
index 3bf81d9b..6d180594 100644
--- a/GPy/testing/rv_transformation_tests.py
+++ b/GPy/testing/rv_transformation_tests.py
@@ -34,7 +34,7 @@ class RVTransformationTestCase(unittest.TestCase):
         # The PDF of the transformed variables
         p_phi = lambda phi : np.exp(-m._objective_grads(phi)[0])
         # To the empirical PDF of:
-        theta_s = prior.rvs(1e6)
+        theta_s = prior.rvs(1e5)
         phi_s = trans.finv(theta_s)
         # which is essentially a kernel density estimation
         kde = st.gaussian_kde(phi_s)