1 files changed, 9 insertions, 5 deletions
diff --git a/tools/wpt/runner.ts b/tools/wpt/runner.ts
index 3a412a56c..0cf625f01 100644
--- a/tools/wpt/runner.ts
+++ b/tools/wpt/runner.ts
@@ -168,9 +168,13 @@ async function generateBundle(location: URL): Promise<string> {
     }
   }
 
-  return scriptContents.map(([url, contents]) =>
-    `Deno.core.evalContext(${JSON.stringify(contents)}, ${
-      JSON.stringify(url)
-    });`
-  ).join("\n");
+  return scriptContents.map(([url, contents]) => `
+(function() {
+  const [_,err] = Deno.core.evalContext(${JSON.stringify(contents)}, ${
+    JSON.stringify(url)
+  });
+  if (err !== null) {
+    throw err?.thrown;
+  }
+})();`).join("\n");
 }