diff --git a/tests/wpt/metadata/dom/nodes/Element-closest.html.ini b/tests/wpt/metadata/dom/nodes/Element-closest.html.ini
index 7947188eb27..705a5da6b9f 100644
--- a/tests/wpt/metadata/dom/nodes/Element-closest.html.ini
+++ b/tests/wpt/metadata/dom/nodes/Element-closest.html.ini
@@ -1,6 +1,7 @@
 [Element-closest.html]
   type: testharness
   [Element.closest with context node 'test11' and selector ':invalid']
+    bug: https://github.com/servo/servo/issues/10781
     expected: FAIL
 
   [Element.closest with context node 'test4' and selector ':scope']
diff --git a/tests/wpt/metadata/html/semantics/selectors/pseudo-classes/valid-invalid.html.ini b/tests/wpt/metadata/html/semantics/selectors/pseudo-classes/valid-invalid.html.ini
index 6e37ccdda71..ffcc544ebe1 100644
--- a/tests/wpt/metadata/html/semantics/selectors/pseudo-classes/valid-invalid.html.ini
+++ b/tests/wpt/metadata/html/semantics/selectors/pseudo-classes/valid-invalid.html.ini
@@ -1,5 +1,6 @@
 [valid-invalid.html]
   type: testharness
+  bug: https://github.com/servo/servo/issues/10781
   [':valid' matches elements that satisfy their constraints]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/webappapis/animation-frames/callback-exception.html.ini b/tests/wpt/metadata/html/webappapis/animation-frames/callback-exception.html.ini
index 7b14e24c05d..43ac27f20e2 100644
--- a/tests/wpt/metadata/html/webappapis/animation-frames/callback-exception.html.ini
+++ b/tests/wpt/metadata/html/webappapis/animation-frames/callback-exception.html.ini
@@ -1,6 +1,7 @@
 [callback-exception.html]
   type: testharness
   expected: TIMEOUT
+  bug: https://github.com/servo/servo/issues/3311
   [requestAnimationFrame callback exceptions are reported to error handler]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/webappapis/animation-frames/callback-invoked.html.ini b/tests/wpt/metadata/html/webappapis/animation-frames/callback-invoked.html.ini
index c829e4716cf..10f4459dbfc 100644
--- a/tests/wpt/metadata/html/webappapis/animation-frames/callback-invoked.html.ini
+++ b/tests/wpt/metadata/html/webappapis/animation-frames/callback-invoked.html.ini
@@ -1,5 +1,6 @@
 [callback-invoked.html]
   type: testharness
+  bug: https://github.com/servo/servo/issues/9751
   [requestAnimationFrame callback is invoked at least once before the timeout]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-processing-algorithm.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-processing-algorithm.html.ini
index d0ea8e8024f..0b64433aff9 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-processing-algorithm.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-processing-algorithm.html.ini
@@ -1,5 +1,6 @@
 [event-handler-processing-algorithm.html]
   type: testharness
   [beforeunload listener returning null cancels event]
+    bug: https://github.com/servo/servo/issues/10787
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/invalid-uncompiled-raw-handler-compiled-once.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/invalid-uncompiled-raw-handler-compiled-once.html.ini
index 0bdfff20821..e5a79400737 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/invalid-uncompiled-raw-handler-compiled-once.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/invalid-uncompiled-raw-handler-compiled-once.html.ini
@@ -1,6 +1,7 @@
 [invalid-uncompiled-raw-handler-compiled-once.html]
   type: testharness
   note: remove inline-event-listener-panic.html when onerror is implemented properly.
+  bug: https://github.com/servo/servo/issues/3311
   [Invalid uncompiled raw handlers should only be compiled once.]
     expected: FAIL