--- a/toolkit/components/extensions/test/xpcshell/xpcshell-common.ini
+++ b/toolkit/components/extensions/test/xpcshell/xpcshell-common.ini
@@ -78,11 +78,10 @@ skip-if = os == "android" # checking for
 [test_ext_topSites.js]
 skip-if = os == "android"
 [test_native_manifests.js]
 subprocess = true
 skip-if = os == "android"
 [test_ext_permissions.js]
 skip-if = os == "android" # Bug 1350559
 [test_proxy_scripts.js]
-skip-if = os == "linux" # bug 1393940
 [test_proxy_scripts_results.js]
 [test_ext_brokenlinks.js]