diff --git a/src/test/clojure/clojure/core/logic/tests.clj b/src/test/clojure/clojure/core/logic/tests.clj
index 3e819221..29a08cca 100644
--- a/src/test/clojure/clojure/core/logic/tests.clj
+++ b/src/test/clojure/clojure/core/logic/tests.clj
@@ -1728,9 +1728,13 @@
           [_2 :vogue :mascarpone 8.5]))))
 
 (deftest test-71-simple-unifier-reify-vars
-  (is (= (u/unify {} '[(?x) (?x) (1)])
+  (is (= (u/unify '[(?x) (?x) (1)])
          '(1))))
 
+(deftest test-36-unifier-behavior
+  (is (= (u/unifier ['(?x ?y) '(?y ?x)])
+         '{?x ?y})))
+
 ;; =============================================================================
 ;; cKanren