diff --git a/src/browser/tests/window/frames.html b/src/browser/tests/window/frames.html
index a48df7a5..be39cb37 100644
--- a/src/browser/tests/window/frames.html
+++ b/src/browser/tests/window/frames.html
@@ -1,3 +1,5 @@
+<script src="../testing.js"></script>
+
 <body>
  <iframe src="https://httpbin.io/html" title="iframea"></iframe>
  <iframe src="https://httpbin.io/html" title="iframeb"></iframe>
diff --git a/src/browser/tests/window/window.html b/src/browser/tests/window/window.html
index 20aae1b5..75a29357 100644
--- a/src/browser/tests/window/window.html
+++ b/src/browser/tests/window/window.html
@@ -1,3 +1,4 @@
+<script src="../testing.js"></script>
 <body></body>
 <script id=aliases>
   testing.expectEqual(window, window.self);
diff --git a/src/testing.zig b/src/testing.zig
index 0264474e..200e2ce7 100644
--- a/src/testing.zig
+++ b/src/testing.zig
@@ -516,18 +516,6 @@ pub fn newRunner(file: []const u8) !void {
     try_catch.init(js_context);
     defer try_catch.deinit();
 
-    // if you want to make a lot of changes to testing.js, but don't want to reload
-    // every time, use this to dynamically load it during development
-    const content = try std.fs.cwd().readFileAlloc(arena_allocator, "src/browser/tests/testing.js", 1024 * 32);
-
-    // const content = @embedFile("browser/tests/testing.js");
-
-    js_context.eval(content, "testing.js") catch |err| {
-        const msg = try_catch.err(arena_allocator) catch @errorName(err) orelse "unknown";
-        std.debug.print("Failed to setup testing.js: {s}\n", .{msg});
-        return err;
-    };
-
     const url = try std.fmt.allocPrint(arena_allocator, "http://localhost:9582/src/browser/tests/{s}", .{file});
     try page.navigate(url, .{});
     page.wait(2);
