diff --git a/crates/test-project-builder/src/lib.rs b/crates/test-project-builder/src/lib.rs
index 9b14f659..e953c999 100644
--- a/crates/test-project-builder/src/lib.rs
+++ b/crates/test-project-builder/src/lib.rs
@@ -489,7 +489,7 @@ impl Project {
 
         if self.headless {
             runjs.push_str("
-                function onerror(error) {
+                function onerror(e) {
                     const errors = document.getElementById('error');
                     let content = `exception: ${e.message}\\nstack: ${e.stack}`;
                     errors.innerHTML = `<pre>${content}</pre>`;