diff --git a/dom/ipc/tests/JSWindowActor/browser_contentWindow.js b/dom/ipc/tests/JSWindowActor/browser_contentWindow.js
index db17fdb6e931..b450e73e5631 100644
--- a/dom/ipc/tests/JSWindowActor/browser_contentWindow.js
+++ b/dom/ipc/tests/JSWindowActor/browser_contentWindow.js
@@ -2,9 +2,11 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 "use strict";
 
+const CONTENT_WINDOW_URL = "https://example.com/";
+
 declTest("contentWindow null when inner window inactive", {
-  matches: [TEST_URL + "*"],
-  url: TEST_URL + "?1",
+  matches: [CONTENT_WINDOW_URL + "*"],
+  url: CONTENT_WINDOW_URL + "?1",
 
   async test(browser) {
     // If Fission is disabled, the pref is no-op.
@@ -17,7 +19,7 @@ declTest("contentWindow null when inner window inactive", {
 
     await actorParent.sendQuery("storeActor");
 
-    let url = TEST_URL + "?2";
+    let url = CONTENT_WINDOW_URL + "?2";
     let loaded = BrowserTestUtils.browserLoaded(browser, false, url);
     await BrowserTestUtils.loadURI(browser, url);
     await loaded;
diff --git a/dom/ipc/tests/test_bug1086684.js b/dom/ipc/tests/test_bug1086684.js
index 63c39e19ccab..de7cfc00db34 100644
--- a/dom/ipc/tests/test_bug1086684.js
+++ b/dom/ipc/tests/test_bug1086684.js
@@ -1,6 +1,7 @@
 "use strict";
 /* eslint-env mozilla/frame-script */
 
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
 const { XPCShellContentUtils } = ChromeUtils.import(
   "resource://testing-common/XPCShellContentUtils.jsm"
 );
@@ -58,6 +59,7 @@ function childFrameScript() {
 }
 
 add_task(async function() {
+  Services.prefs.setBoolPref("dom.security.https_first", false);
   let page = await XPCShellContentUtils.loadContentPage(childFrameURL, {
     remote: true,
   });
@@ -94,4 +96,5 @@ add_task(async function() {
   });
 
   await page.close();
+  Services.prefs.clearUserPref("dom.security.https_first");
 });