diff --git a/testing/web-platform/tests/fenced-frame/fledge-container-size.https.html b/testing/web-platform/tests/fenced-frame/fledge-container-size.https.html
index 6f2c519d43a2c..5347c841d58e7 100644
--- a/testing/web-platform/tests/fenced-frame/fledge-container-size.https.html
+++ b/testing/web-platform/tests/fenced-frame/fledge-container-size.https.html
@@ -89,9 +89,6 @@
 }
 
 // Type error cases.
-promise_test(async () => { return checkSyntaxError('299', '72'); }, '299 x 72');
-promise_test(async () => { return checkSyntaxError('299px', '72'); }, '299px x 72');
-promise_test(async () => { return checkSyntaxError('299', '72px'); }, '299 x 72px');
 promise_test(async () => { return checkSyntaxError('-299px', '72px'); }, '-299px x 72px');
 promise_test(async () => { return checkSyntaxError('299px', '-72px'); }, '299px x -72px');
 promise_test(async () => { return checkSyntaxError('0px', '0px'); }, '0px x 0px');