diff --git a/webdriver/tests/support/inline.py b/webdriver/tests/support/inline.py
index 8364e0590ea3c0..3df81a231bb246 100644
--- a/webdriver/tests/support/inline.py
+++ b/webdriver/tests/support/inline.py
@@ -19,7 +19,7 @@
   </body>
 </html>""",
     "xml": """<?xml version="1.0" encoding="{charset}"?>\n{src}""",
-    "js": "",
+    "js": "{src}",
 }
 MIME_TYPES = {
     "html": "text/html",