diff --git a/browser/components/preferences/in-content/tests/siteData/browser.ini b/browser/components/preferences/in-content/tests/siteData/browser.ini
index 2ad75b35e68e..3e7e3a3aa8cc 100644
--- a/browser/components/preferences/in-content/tests/siteData/browser.ini
+++ b/browser/components/preferences/in-content/tests/siteData/browser.ini
@@ -8,7 +8,7 @@ support-files =
   offline/manifest.appcache
 
 [browser_clearSiteData.js]
-skip-if = os == 'mac' && !debug # bug 1436395
+skip-if = true # bug 1436395
 [browser_siteData.js]
 skip-if = (os == 'linux') || (os == 'mac' && !debug) || verify # Bug 1439332, Bug 1436395, Bug 1415037
 [browser_siteData2.js]