diff --git a/test/prior_tests.py b/test/prior_tests.py
index bbed21f609404280932b7038c49a0e014e2cc3a4..d44f2fe075e63c962a76a9641fa30f09e9ea72ba 100644
--- a/test/prior_tests.py
+++ b/test/prior_tests.py
@@ -198,6 +198,7 @@ class TestFillPrior(unittest.TestCase):
     def setUp(self):
         self.likelihood = Mock()
         self.likelihood.parameters = dict(a=0, b=0, c=0, d=0, asdf=0, ra=1)
+        self.likelihood.non_standard_sampling_parameter_keys = dict(t=8)
         self.priors = dict(a=1, b=1.1, c='string', d=tupak.prior.Uniform(0, 1))
         self.priors = tupak.prior.fill_priors(self.priors, self.likelihood)