diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/maxlength.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/maxlength.html
index 59c97198be5b..8f0a2567d40e 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/maxlength.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/maxlength.html
@@ -39,15 +39,9 @@ <h1>Text input element</h1>
 
       test(
           function() {
-            try {
+            assert_throws("INDEX_SIZE_ERR", function() {
               document.getElementById("assign-negative").maxLength = -5;
-            } catch (e) {
-              if (e.name == "IndexSizeError") {
-                return;
-              }
-            }
-
-            throw new Error("expected IndexSizeError");
+            });
           }, "Assigning negative integer throws IndexSizeError");
 
       test(