diff --git a/GPy/testing/mrd_tests.py b/GPy/testing/mrd_tests.py
index 17e43a7e..903cddfc 100644
--- a/GPy/testing/mrd_tests.py
+++ b/GPy/testing/mrd_tests.py
@@ -23,7 +23,7 @@ class MRDTests(unittest.TestCase):
         Ylist = [np.random.multivariate_normal(np.zeros(N), K, D).T for _ in range(num_m)]
         likelihood_list = [GPy.likelihoods.Gaussian(Y) for Y in Ylist]
 
-        m = GPy.models.MRD(*likelihood_list, Q=Q, kernel=k, M=M)
+        m = GPy.models.MRD(likelihood_list, Q=Q, kernels=k, M=M)
         m.ensure_default_constraints()
 
         self.assertTrue(m.checkgrad())