diff --git a/simple-stack/src/test/java/com/zhuinden/simplestack/BackstackTest.java b/simple-stack/src/test/java/com/zhuinden/simplestack/BackstackTest.java
index 147df130..39fe7624 100644
--- a/simple-stack/src/test/java/com/zhuinden/simplestack/BackstackTest.java
+++ b/simple-stack/src/test/java/com/zhuinden/simplestack/BackstackTest.java
@@ -934,10 +934,12 @@ class InvalidObject {
         TestObject testObject = new TestObject();
         TestObject testPendingObject = new TestObject();
         TestObject testRemovedObject = new TestObject();
+        Object testNormalObject = new Object();
 
         backstack.addRetainedObject("testObject", testObject);
         backstack.addRetainedObject("testPendingObject", testPendingObject);
         backstack.addRetainedObject("testRemovedObject", testRemovedObject);
+        backstack.addRetainedObject("testNormalObject", testNormalObject);
 
         assertThat(testObject.currentState).isEqualTo(3);
         assertThat(testPendingObject.currentState).isEqualTo(3);
@@ -963,6 +965,8 @@ public void handleStateChange(@Nonnull StateChange stateChange, @Nonnull StateCh
         backstack2.fromBundle(bundle);
         assertThat(testObject.currentState).isEqualTo(5);
 
+        backstack2.addRetainedObject("testNormalObject", testNormalObject);
+
         try {
             backstack2.addRetainedObject("testPendingObject", new InvalidObject());
             Assert.fail();