diff --git a/ext/web/06_streams.js b/ext/web/06_streams.js
index 09e5b74148..933d7b09ca 100644
--- a/ext/web/06_streams.js
+++ b/ext/web/06_streams.js
@@ -2675,7 +2675,9 @@
               ],
             );
           }
-          cancelPromise.resolve(undefined);
+          if (canceled1 === false || canceled2 === false) {
+            cancelPromise.resolve(undefined);
+          }
         },
         errorSteps() {
           reading = false;
diff --git a/tools/wpt/expectation.json b/tools/wpt/expectation.json
index d5560ffb6b..e9dfa03d0a 100644
--- a/tools/wpt/expectation.json
+++ b/tools/wpt/expectation.json
@@ -1336,8 +1336,12 @@
       "patched-global.any.worker.html": true,
       "reentrant-strategies.any.html": true,
       "reentrant-strategies.any.worker.html": true,
-      "tee.any.html": false,
-      "tee.any.worker.html": false,
+      "tee.any.html": [
+        "ReadableStream teeing: enqueue() and close() while both branches are pulling"
+      ],
+      "tee.any.worker.html": [
+        "ReadableStream teeing: enqueue() and close() while both branches are pulling"
+      ],
       "templated.any.html": true,
       "templated.any.worker.html": true
     },