diff --git a/browser/components/loop/manifest.ini b/browser/components/loop/manifest.ini
index 6185528b067..95e21509e61 100644
--- a/browser/components/loop/manifest.ini
+++ b/browser/components/loop/manifest.ini
@@ -18,6 +18,7 @@ browser = true
 qemu = false
 
 [test/shared/test_shared_all.py]
+skip-if = os == "win" # Bug 1149955
 [test/desktop-local/test_desktop_all.py]
 [test/standalone/test_standalone_all.py]
 [test/ui-showcase/test_ui-showcase.py]