diff --git a/GPy/testing/examples_tests.py b/GPy/testing/examples_tests.py
index 141d3999..feba2b50 100644
--- a/GPy/testing/examples_tests.py
+++ b/GPy/testing/examples_tests.py
@@ -30,6 +30,7 @@ def checkgrads_generator(model):
 """
 
 def model_checkgrads(model):
+    model.randomize()
     assert model.checkgrad()