diff --git a/testing/web-platform/meta/css/filter-effects/backdrop-filter-reference-filter-mutated.html.ini b/testing/web-platform/meta/css/filter-effects/backdrop-filter-reference-filter-mutated.html.ini
deleted file mode 100644
index 6d716daa73e3..000000000000
--- a/testing/web-platform/meta/css/filter-effects/backdrop-filter-reference-filter-mutated.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[backdrop-filter-reference-filter-mutated.html]
-  bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1916097
-  expected:
-    if not nightly_build: FAIL
diff --git a/testing/web-platform/meta/css/filter-effects/effect-reference-on-transparent-element.html.ini b/testing/web-platform/meta/css/filter-effects/effect-reference-on-transparent-element.html.ini
deleted file mode 100644
index 006595896932..000000000000
--- a/testing/web-platform/meta/css/filter-effects/effect-reference-on-transparent-element.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[effect-reference-on-transparent-element.html]
-  bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1906212
-  expected:
-    if not nightly_build: FAIL