diff --git a/tools/harness-safari.py b/tools/harness-safari.py
index 24036e6..d9bb748 100644
--- a/tools/harness-safari.py
+++ b/tools/harness-safari.py
@@ -23,7 +23,8 @@ gate = '<button id="go" style="position:fixed;top:0;left:0;z-index:99;padding:20
 script = script.replace('(async () => {\n  document.dispatchEvent(new Event("keydown"));', "(async () => {\n  await window.__gate;", 1)
 assert "await window.__gate" in script, "the fragment's opening line changed; update the gate"
 (out / "run.html").write_text(page.replace("</body>", gate + script + "</body>"))
-(out / "brain.js").write_text((ROOT / "brain.js").read_text())
+for js in list(ROOT.glob("*.js")) + list(ROOT.glob("ui/*.js")):      # the modules and brain.js, beside the page
+    (out / js.relative_to(ROOT)).parent.mkdir(exist_ok=True); (out / js.relative_to(ROOT)).write_text(js.read_text())
 for extra in ("sw.js", "manifest.json", "favicon.svg"):
     if (ROOT / extra).exists(): (out / extra).write_text((ROOT / extra).read_text())