diff --git a/test/unit/app/sessionStoreTest.js b/test/unit/app/sessionStoreTest.js
index 0190e3fd175..21e6dea9495 100644
--- a/test/unit/app/sessionStoreTest.js
+++ b/test/unit/app/sessionStoreTest.js
@@ -99,6 +99,7 @@ describe('sessionStore unit tests', function () {
 
   after(function () {
     mockery.disable()
+    mockery.deregisterAll()
   })
 
   describe('saveAppState', function () {