diff --git a/lib/realm.js b/lib/realm.js
index d9eeb336..aecc56de 100644
--- a/lib/realm.js
+++ b/lib/realm.js
@@ -125,7 +125,10 @@ Object.defineProperties(Realm, {
         set: util.setterForProperty('defaultPath'),
     },
     clearTestState: {
-        value: rpc.clearTestState,
+        value: function() {
+            util.clearMutationListeners();
+            rpc.clearTestState();
+        },
     },
 });
 
diff --git a/lib/util.js b/lib/util.js
index 6ea4f95c..5733e54d 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -8,9 +8,10 @@ const constants = require('./constants');
 const rpc = require('./rpc');
 
 const {keys} = constants;
-const mutationListeners = {};
+let mutationListeners = {};
 
 module.exports = {
+    clearMutationListeners,
     fireMutationListeners,
     createList,
     createMethods,
@@ -31,6 +32,10 @@ function removeMutationListener(realmId, callback) {
     }
 }
 
+function clearMutationListeners() {
+    mutationListeners = {};
+}
+
 function fireMutationListeners(realmId) {
     let listeners = mutationListeners[realmId];
     if (listeners) {