--- a/devtools/client/aboutdebugging/test/browser.ini
+++ b/devtools/client/aboutdebugging/test/browser.ini
@@ -31,16 +31,17 @@ tags = webextensions
 [browser_addons_debugging_initial_state.js]
 [browser_addons_install.js]
 [browser_addons_reload.js]
 [browser_addons_toggle_debug.js]
 [browser_page_not_found.js]
 [browser_service_workers.js]
 [browser_service_workers_fetch_flag.js]
 [browser_service_workers_multi_content_process.js]
+skip-if = !e10s # This test is only valid in e10s
 [browser_service_workers_not_compatible.js]
 [browser_service_workers_push.js]
 [browser_service_workers_push_service.js]
 [browser_service_workers_start.js]
 [browser_service_workers_status.js]
 [browser_service_workers_timeout.js]
 skip-if = true # Bug 1232931
 [browser_service_workers_unregister.js]