diff --git a/gtsam/inference/tests/testPermutation.cpp b/gtsam/inference/tests/testPermutation.cpp
index 98e94b4f7..5aa83422f 100644
--- a/gtsam/inference/tests/testPermutation.cpp
+++ b/gtsam/inference/tests/testPermutation.cpp
@@ -125,6 +125,7 @@ TEST(Reduction, CreateFromPartialPermutation) {
   expected.insert(make_pair(6,4));
 
   internal::Reduction actual = internal::Reduction::CreateFromPartialPermutation(selector, p);
+  EXPECT(assert_equal(expected, actual));
 }
 
 /* ************************************************************************* */