diff --git a/GPy/models/gradient_checker.py b/GPy/models/gradient_checker.py
index 1b4071d4..fa49ee0e 100644
--- a/GPy/models/gradient_checker.py
+++ b/GPy/models/gradient_checker.py
@@ -48,8 +48,6 @@ class GradientChecker(Model):
                 X = numpy.random.rand(N, Q)
                 grad = GradientChecker(numpy.sin,numpy.cos,X,'x')
                 grad.checkgrad(verbose=1)
-                grad.randomize()
-                grad.checkgrad(verbose=1)      
     
             Using GPy: