diff --git a/README.md b/README.md
index d84ab18..d5e9e5b 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,12 @@ light weight replacement for native interop (JNI, JNA, etc.).
 
 - When developing pods, this library can be used to test them on the JVM.
 
+## Run tests
+
+```
+$ script/test
+```
+
 ## License
 
 Copyright © 2020 Michiel Borkent
diff --git a/src/babashka/pods/jvm.clj b/src/babashka/pods/jvm.clj
index aeb621f..8e8f9c1 100644
--- a/src/babashka/pods/jvm.clj
+++ b/src/babashka/pods/jvm.clj
@@ -9,5 +9,6 @@
      (doseq [[ns-sym v] namespaces]
        (load-string (format "(ns %s)" ns-sym))
        (doseq [[var-sym v] v]
+         (ns-unmap ns-sym var-sym)
          (intern ns-sym var-sym v)))
      (future (impl/processor pod)))))
diff --git a/test/babashka/pods/jvm_test.clj b/test/babashka/pods/jvm_test.clj
index 9c77a1e..9d69f28 100644
--- a/test/babashka/pods/jvm_test.clj
+++ b/test/babashka/pods/jvm_test.clj
@@ -16,4 +16,4 @@
              [1 2 3 4 5 6 7 8 9]
              "Illegal arguments / {:args (1 2 3)}"] ret))
     (is (= "(\"hello\" \"print\" \"this\" \"debugging\" \"message\")\n" (str out)))
-    (is (= "WARNING: assoc already refers to: #'clojure.core/assoc in namespace: pod.test-pod, being replaced by: #'pod.test-pod/assoc\nWARNING: print already refers to: #'clojure.core/print in namespace: pod.test-pod, being replaced by: #'pod.test-pod/print\n(\"hello\" \"print\" \"this\" \"error\")\n" (str err)))))
+    (is (= "(\"hello\" \"print\" \"this\" \"error\")\n" (str err)))))