diff --git a/tests/wpt/metadata/webstorage/storage_local_setitem_quotaexceedederr.html.ini b/tests/wpt/metadata/webstorage/storage_local_setitem_quotaexceedederr.html.ini
index dcfe5d1a8ce..a9a0f773b81 100644
--- a/tests/wpt/metadata/webstorage/storage_local_setitem_quotaexceedederr.html.ini
+++ b/tests/wpt/metadata/webstorage/storage_local_setitem_quotaexceedederr.html.ini
@@ -1,4 +1,3 @@
 [storage_local_setitem_quotaexceedederr.html]
   type: testharness
-  disabled: intermittently crashes instead of times out in release
-  expected: TIMEOUT
+  disabled: https://github.com/servo/servo/issues/6734
diff --git a/tests/wpt/metadata/webstorage/storage_session_setitem_quotaexceedederr.html.ini b/tests/wpt/metadata/webstorage/storage_session_setitem_quotaexceedederr.html.ini
index ab2b15baeb9..098bc8405f8 100644
--- a/tests/wpt/metadata/webstorage/storage_session_setitem_quotaexceedederr.html.ini
+++ b/tests/wpt/metadata/webstorage/storage_session_setitem_quotaexceedederr.html.ini
@@ -1,3 +1,3 @@
 [storage_session_setitem_quotaexceedederr.html]
   type: testharness
-  expected: TIMEOUT
+  disabled: https://github.com/servo/servo/issues/6734