diff --git a/browser/modules/UITour.jsm b/browser/modules/UITour.jsm
index 129495bd7d05..cc3da30dedb4 100644
--- a/browser/modules/UITour.jsm
+++ b/browser/modules/UITour.jsm
@@ -38,7 +38,7 @@ const BUCKET_TIMESTEPS    = [
 ];
 
 // Time after which seen Page IDs expire.
-const SEENPAGEID_EXPIRY  = 2 * 7 * 24 * 60 * 60 * 1000; // 2 weeks.
+const SEENPAGEID_EXPIRY  = 8 * 7 * 24 * 60 * 60 * 1000; // 8 weeks.
 
 
 this.UITour = {
diff --git a/browser/modules/test/browser_UITour_registerPageID.js b/browser/modules/test/browser_UITour_registerPageID.js
index 66552e4db48b..08e0f3a069ea 100644
--- a/browser/modules/test/browser_UITour_registerPageID.js
+++ b/browser/modules/test/browser_UITour_registerPageID.js
@@ -55,8 +55,8 @@ let tests = [
     let data = JSON.stringify([
       ["savedID1", { lastSeen: Date.now() }],
       ["savedID2", { lastSeen: Date.now() }],
-      // 3 weeks ago, should auto expire.
-      ["savedID3", { lastSeen: Date.now() - 3 * 7 * 24 * 60 * 60 * 1000 }],
+      // 9 weeks ago, should auto expire.
+      ["savedID3", { lastSeen: Date.now() - 9 * 7 * 24 * 60 * 60 * 1000 }],
     ]);
     Services.prefs.setCharPref("browser.uitour.seenPageIDs",
                                data);