diff --git a/tests/lib_2/lib_2_dart2js.status b/tests/lib_2/lib_2_dart2js.status
index c37cc88..80e194f715 100644
--- a/tests/lib_2/lib_2_dart2js.status
+++ b/tests/lib_2/lib_2_dart2js.status
@@ -358,6 +358,7 @@
 convert/streamed_conversion_json_utf8_encode_test: SkipSlow # Times out. Issue 22050
 convert/streamed_conversion_utf8_decode_test: SkipSlow # Times out. Issue 22050
 convert/utf85_test: Pass, Slow, Timeout
+html/callback_list_test: SkipByDesign # FileSystem not supported in FireFox.
 html/custom/attribute_changed_callback_test: Skip # Times out
 html/custom/constructor_calls_created_synchronously_test: Pass, Timeout
 html/custom/created_callback_test: Skip # Times out
@@ -461,6 +462,7 @@
 
 [ $compiler == dart2js && $runtime == safari ]
 html/audiobuffersourcenode_test: RuntimeError
+html/callback_list_test: SkipByDesign # FileSystem not supported in Safari.
 html/css_test/functional/functional: RuntimeError # Issue 32576
 html/custom/attribute_changed_callback_test: RuntimeError, Timeout
 html/custom/constructor_calls_created_synchronously_test: Pass, Timeout