diff --git a/README.md b/README.md
index e2bda20..f2ea99b 100644
--- a/README.md
+++ b/README.md
@@ -210,7 +210,7 @@ deps.edn used for this example:
 - Clojure [tools.deps](https://clojure.org/guides/getting_started)
 
 ### Running tests locally
-- `clojure -M:test` to run all tests
+- `clojure -X:test` to run all tests
 
 ## License
 
diff --git a/src/navi/core.clj b/src/navi/core.clj
index 17f9261..2f8d1f3 100644
--- a/src/navi/core.clj
+++ b/src/navi/core.clj
@@ -85,13 +85,6 @@
               .getSchema
               schema->spec))))
 
-(defn matches-regex?
-  [exp s]
-  (-> exp
-      (re-pattern)
-      (re-matches s)
-      (some?)))
-
 (defmulti spec
   (fn [^Schema schema]
     (or (first (.getTypes schema)) "null")))
@@ -104,7 +97,7 @@
                      string?)
         pattern (.getPattern schema)]
     (if pattern
-      [:and content-fn [:fn #(matches-regex? pattern %)]]
+      [:and content-fn (re-pattern pattern)]
       content-fn)))
 
 (defmethod spec
diff --git a/test/navi/core_test.clj b/test/navi/core_test.clj
index b1469da..7e1b83a 100644
--- a/test/navi/core_test.clj
+++ b/test/navi/core_test.clj
@@ -127,14 +127,14 @@
       (is (#{[:or string? int?] [:or int? string?]}
            (core/schema->spec strint)))))
   (testing "regex string"
-    (let [[kw1 fn1 [kw2 fn2]] (core/schema->spec (doto (Schema.)
-                                                   (.addType "string")
-                                                   (.setPattern "^(\\d+)([KMGTPE]i{0,1})$")))]
-      (is (= :and kw1))
-      (is (= string? fn1))
-      (is (= :fn kw2))
-      (is (fn2 "1024Ki"))
-      (is (not (fn2 "1024Kib"))))))
+    (let [[kw f regex] (core/schema->spec (doto (Schema.)
+                                            (.addType "string")
+                                            (.setPattern "^(\\d+)([KMGTPE]i{0,1})$")))]
+      (is (= :and kw))
+      (is (= string? f))
+      (is (instance? java.util.regex.Pattern regex))
+      (is (some? (re-matches regex "1024Ki")))
+      (is (nil? (re-matches regex "1024Kib"))))))
 
 (deftest responses-to-malli-spec
   (testing "empty response"