diff --git a/cli/tests/wpt.jsonc b/cli/tests/wpt.jsonc
index 3e151b9545..479b6a7475 100644
--- a/cli/tests/wpt.jsonc
+++ b/cli/tests/wpt.jsonc
@@ -22,7 +22,13 @@
     "api-invalid-label",
     "api-replacement-encodings",
     "api-surrogates-utf8",
-    // TODO(lucacasonato): enable encodeInto. It is buggy at the moment.
+    // TODO(lucacasonato): enable encodeInto. We have a bug in implementaiton.
+    // {
+    //   "name": "encodeInto",
+    //   "expectFail": [
+    //     "encodeInto() and a detached output buffer"
+    //   ]
+    // },
     // "encodeInto",
     // TODO(lucacasonato): enable when we support iso-2022-jp
     // "iso-2022-jp-decoder",
@@ -110,7 +116,7 @@
         "utf-16le => UTF-16LE",
         "x-user-defined => x-user-defined"
       ]
-    }
+    },
     // TODO(lucacasonato): enable when we have stream support
     // "textdecoder-streaming",
     // TODO(lucacasonato): enable when we support utf-16
@@ -134,5 +140,8 @@
     // "textencoder-utf16-surrogates",
     // TODO(lucacasonato): uses XMLHttpRequest unnecessarily. should be fixed upstream before enabling
     // "unsupported-encodings",
+  ],
+  "dom": [
+    "abort/event"
   ]
 }
diff --git a/op_crates/web/01_event.js b/op_crates/web/01_event.js
index 35b269ea4b..fb80ea4a68 100644
--- a/op_crates/web/01_event.js
+++ b/op_crates/web/01_event.js
@@ -42,6 +42,13 @@
     event.currentTarget = value;
   }
 
+  function setIsTrusted(event, value) {
+    const data = eventData.get(event);
+    if (data) {
+      data.isTrusted = value;
+    }
+  }
+
   function setDispatched(event, value) {
     const data = eventData.get(event);
     if (data) {
@@ -1185,4 +1192,7 @@
   window.__bootstrap.eventTarget = {
     setEventTargetData,
   };
+  window.__bootstrap.event = {
+    setIsTrusted,
+  };
 })(this);
diff --git a/op_crates/web/02_abort_signal.js b/op_crates/web/02_abort_signal.js
index 5ee047c360..412dab8357 100644
--- a/op_crates/web/02_abort_signal.js
+++ b/op_crates/web/02_abort_signal.js
@@ -1,6 +1,8 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
 ((window) => {
+  const { setIsTrusted } = window.__bootstrap.event;
+
   const add = Symbol("add");
   const signalAbort = Symbol("signalAbort");
   const remove = Symbol("remove");
@@ -24,7 +26,9 @@
         algorithm();
       }
       this.#abortAlgorithms.clear();
-      this.dispatchEvent(new Event("abort"));
+      const event = new Event("abort");
+      setIsTrusted(event, true);
+      this.dispatchEvent(event);
     }
 
     [remove](algorithm) {