diff --git a/test/taoensso/nippy/tests/main.clj b/test/taoensso/nippy/tests/main.clj
index 4548939..ce49825 100644
--- a/test/taoensso/nippy/tests/main.clj
+++ b/test/taoensso/nippy/tests/main.clj
@@ -275,6 +275,17 @@
 
     "Can freeze and thaw Serializable object if approved by whitelist")
 
+  (is
+    (false?
+      (get-in
+        (binding [nippy/*serializable-whitelist* #{}]
+          (nippy/thaw
+            (binding [nippy/*serializable-whitelist* #{"java.util.concurrent.Semaphore"}]
+              (nippy/freeze (java.util.concurrent.Semaphore. 1)))))
+        [:nippy/unthawable :serializable-whitelist-pass?]))
+
+    "Thaw will quarantine Serializable objects approved when freezing.")
+
   (is
     (instance? java.util.concurrent.Semaphore
       (binding [nippy/*serializable-whitelist* #{"java.util.concurrent.*"}]