--- a/mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/SessionLifecycleTest.kt
+++ b/mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/SessionLifecycleTest.kt
@@ -1,16 +1,19 @@
 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
  * Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 package org.mozilla.geckoview.test
 
 import org.mozilla.geckoview.GeckoSession
 import org.mozilla.geckoview.GeckoSessionSettings
+import org.mozilla.geckoview.test.rule.GeckoSessionTestRule.ClosedSessionAtStart
+import org.mozilla.geckoview.test.rule.GeckoSessionTestRule.NullDelegate
+import org.mozilla.geckoview.test.util.Callbacks
 
 import android.support.test.filters.MediumTest
 import android.support.test.runner.AndroidJUnit4
 
 import org.hamcrest.Matchers.*
 import org.junit.Test
 import org.junit.runner.RunWith
 
@@ -185,16 +188,46 @@ class SessionLifecycleTest : BaseSession
         session2.toParcel { parcel ->
             session3.readFromParcel(parcel)
         }
 
         session3.reload()
         session3.waitForPageStop()
     }
 
+    @NullDelegate(GeckoSession.NavigationDelegate::class)
+    @ClosedSessionAtStart
+    @Test fun readFromParcel_moduleUpdated() {
+        val session = sessionRule.createOpenSession()
+
+        // Disable navigation notifications on the old, open session.
+        assertThat("Old session navigation delegate should be null",
+                   session.navigationDelegate, nullValue())
+
+        // Enable navigation notifications on the new, closed session.
+        var onLocationCount = 0
+        sessionRule.session.navigationDelegate = object : Callbacks.NavigationDelegate {
+            override fun onLocationChange(session: GeckoSession, url: String) {
+                onLocationCount++
+            }
+        }
+
+        // Transferring the old session to the new session should
+        // automatically re-enable navigation notifications.
+        session.toParcel { parcel ->
+            sessionRule.session.readFromParcel(parcel)
+        }
+
+        sessionRule.session.reload()
+        sessionRule.session.waitForPageStop()
+
+        assertThat("New session should receive navigation notifications",
+                   onLocationCount, equalTo(1))
+    }
+
     @Test fun createFromParcel() {
         val session = sessionRule.createOpenSession()
 
         session.toParcel { parcel ->
             val newSession = sessionRule.wrapSession(
                     GeckoSession.CREATOR.createFromParcel(parcel))
 
             assertThat("New session has same settings",