diff --git a/tests/wpt/metadata/encoding/encodeInto.any.js.ini b/tests/wpt/metadata/encoding/encodeInto.any.js.ini
index fa6ec12c0f5f..20c03de93ac3 100644
--- a/tests/wpt/metadata/encoding/encodeInto.any.js.ini
+++ b/tests/wpt/metadata/encoding/encodeInto.any.js.ini
@@ -1129,3 +1129,8 @@
   [encodeInto() into SharedArrayBuffer with 𝌆 and destination length 4, offset 4, filler 128]
     expected: FAIL
 
+[encodeInto.any.serviceworker.html]
+  expected: ERROR
+
+[encodeInto.any.sharedworker.html]
+  expected: ERROR