diff --git a/tools/wpt.ts b/tools/wpt.ts
index 799e6b0c7e..a3999a4257 100755
--- a/tools/wpt.ts
+++ b/tools/wpt.ts
@@ -210,6 +210,14 @@ async function generateWptReport(
       : result.harnessStatus?.status === 0
       ? "OK"
       : "ERROR";
+    let message;
+    if (result.harnessStatus === null && result.status === 0) {
+      // If the only error is the event loop running out of tasks, using stderr
+      // as the message won't help.
+      message = "Event loop run out of tasks.";
+    } else {
+      message = result.harnessStatus?.message ?? (result.stderr.trim() || null);
+    }
     const reportResult = {
       test: test.url.pathname + test.url.search + test.url.hash,
       subtests: result.cases.map((case_) => {
@@ -231,9 +239,7 @@ async function generateWptReport(
         };
       }),
       status,
-      message: escapeLoneSurrogates(
-        result.harnessStatus?.message ?? (result.stderr.trim() || null),
-      ),
+      message: escapeLoneSurrogates(message),
       duration: result.duration,
       expected: status === "OK" ? undefined : "OK",
       "known_intermittent": [],
@@ -320,14 +326,14 @@ async function update() {
 
   const resultTests: Record<
     string,
-    { passed: string[]; failed: string[]; status: number }
+    { passed: string[]; failed: string[]; testSucceeded: boolean }
   > = {};
   for (const { test, result } of results) {
     if (!resultTests[test.path]) {
       resultTests[test.path] = {
         passed: [],
         failed: [],
-        status: result.status,
+        testSucceeded: result.status === 0 && result.harnessStatus !== null,
       };
     }
     for (const case_ of result.cases) {
@@ -342,11 +348,11 @@ async function update() {
   const currentExpectation = getExpectation();
 
   for (const path in resultTests) {
-    const { passed, failed, status } = resultTests[path];
+    const { passed, failed, testSucceeded } = resultTests[path];
     let finalExpectation: boolean | string[];
-    if (failed.length == 0 && status == 0) {
+    if (failed.length == 0 && testSucceeded) {
       finalExpectation = true;
-    } else if (failed.length > 0 && passed.length > 0 && status == 0) {
+    } else if (failed.length > 0 && passed.length > 0 && testSucceeded) {
       finalExpectation = failed;
     } else {
       finalExpectation = false;
@@ -413,7 +419,7 @@ function reportFinal(
       result,
       test.expectation,
     );
-    if (result.status !== 0) {
+    if (result.status !== 0 || result.harnessStatus === null) {
       if (test.expectation === false) {
         finalExpectedFailedAndFailedCount += 1;
       } else {
@@ -520,15 +526,18 @@ function analyzeTestResult(
 }
 
 function reportVariation(result: TestResult, expectation: boolean | string[]) {
-  if (result.status !== 0) {
+  if (result.status !== 0 || result.harnessStatus === null) {
     console.log(`test stderr:`);
     writeAllSync(Deno.stdout, new TextEncoder().encode(result.stderr));
 
     const expectFail = expectation === false;
+    const failReason = result.status !== 0
+      ? "runner failed during test"
+      : "the event loop run out of tasks during the test";
     console.log(
       `\nfile result: ${
         expectFail ? yellow("failed (expected)") : red("failed")
-      }. runner failed during test\n`,
+      }. ${failReason}\n`,
     );
     return;
   }
diff --git a/tools/wpt/expectation.json b/tools/wpt/expectation.json
index fbab59d689..4124efe7c8 100644
--- a/tools/wpt/expectation.json
+++ b/tools/wpt/expectation.json
@@ -2252,12 +2252,7 @@
       "enqueue-with-detached-buffer.window.html": false
     },
     "readable-streams": {
-      "async-iterator.any.html": [
-        "Async-iterating a pull source manually",
-        "next() rejects if the stream errors",
-        "return() does not rejects if the stream has not errored yet",
-        "next() that succeeds; next() that reports an error; next()"
-      ],
+      "async-iterator.any.html": false,
       "bad-strategies.any.html": true,
       "bad-underlying-sources.any.html": true,
       "cancel.any.html": true,
@@ -2799,7 +2794,7 @@
     "reading-data-section": {
       "Determining-Encoding.any.html": true,
       "FileReader-event-handler-attributes.any.html": true,
-      "FileReader-multiple-reads.any.html": true,
+      "FileReader-multiple-reads.any.html": false,
       "filereader_abort.any.html": true,
       "filereader_error.any.html": true,
       "filereader_events.any.html": false,
@@ -2825,7 +2820,7 @@
         "type-long-settimeout.any.html": true
       },
       "microtask-queuing": {
-        "queue-microtask-exceptions.any.html": true,
+        "queue-microtask-exceptions.any.html": false,
         "queue-microtask.any.html": true
       }
     }