diff --git a/src/rich4clojure/elementary/problem_161.clj b/src/rich4clojure/elementary/problem_161.clj
index 0a86bd5..d119c78 100644
--- a/src/rich4clojure/elementary/problem_161.clj
+++ b/src/rich4clojure/elementary/problem_161.clj
@@ -17,10 +17,10 @@
   )
 
 (tests
-  __ := #{2}
-  #{1} := __
-  __ := #{1 2}
-  #{1 2} := __)
+ (clojure.set/superset? __ #{2}) := true
+ (clojure.set/subset? #{1} __) := true
+ (clojure.set/superset? __ #{1 2}) := true
+ (clojure.set/subset? #{1 2} __) := true)
 
 ;; Share your solution, and/or check how others did it:
-;; https://gist.github.com/fb5992733dcee8d4e449957ed7ece7db
\ No newline at end of file
+;; https://gist.github.com/fb5992733dcee8d4e449957ed7ece7db