--- a/toolkit/mozapps/update/tests/chrome/chrome.ini
+++ b/toolkit/mozapps/update/tests/chrome/chrome.ini
@@ -13,18 +13,18 @@ support-files =
 ; order and not in the order specified in the manifest.
 [test_0011_check_basic.xul]
 [test_0012_check_basic_license.xul]
 [test_0013_check_incompat_basic.xul]
 [test_0014_check_incompat_basic_license.xul]
 [test_0015_check_incompat_basic_addons.xul]
 [test_0016_check_incompat_basic_license_addons.xul]
 [test_0017_check_staging_basic.xul]
-skip-if = os == 'linux'
-reason = Bug 918029 - timeout caused by copying too many files.
+skip-if = os != 'win'
+reason = Bug 918029 and bug 1164560 - timeout caused by copying too many files.
 [test_0021_check_billboard.xul]
 [test_0022_check_billboard_license.xul]
 [test_0023_check_incompat_billboard.xul]
 [test_0024_check_incompat_billboard_license.xul]
 [test_0025_check_incompat_billboard_addons.xul]
 [test_0026_check_incompat_billboard_license_addons.xul]
 [test_0031_available_basic.xul]
 [test_0032_available_basic_license.xul]