diff --git a/testing/profiles/prefs_general.js b/testing/profiles/prefs_general.js
index 83f242c85709..36bc077483b1 100644
--- a/testing/profiles/prefs_general.js
+++ b/testing/profiles/prefs_general.js
@@ -195,9 +195,6 @@ user_pref("general.useragent.updates.enabled", false);
 // Disable webapp updates.  Yes, it is supposed to be an integer.
 user_pref("browser.webapps.checkForUpdates", 0);
 
-// Do not turn HTTP cache v2 for our infra tests (some tests are failing)
-user_pref("browser.cache.use_new_backend_temp", false);
-
 // Don't connect to Yahoo! for RSS feed tests.
 // en-US only uses .types.0.uri, but set all of them just to be sure.
 user_pref('browser.contentHandlers.types.0.uri', 'http://test1.example.org/rss?url=%%s')