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diff --git a/demos/react-fast-refresh-test/src/main.tsx b/demos/react-fast-refresh-test/src/main.tsx
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+++ b/demos/react-fast-refresh-test/src/main.tsx
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+import React from "react";
+
+export const Main = ({ productName }) => {
+  return (
+    <>
+      <header>
+        <div className="Title">CSS HMR Stress Test</div>
+        <p className="Description">
+          This page visually tests how quickly a bundler can update CSS over Hot
+          Module Reloading.
+        </p>
+      </header>
+      <main className="main">
+        <section className="ProgressSection">
+          <p className="Subtitle">
+            <span className="Subtitle-part">
+              Ran:&nbsp;<span className="timer"></span>
+            </span>
+          </p>
+
+          <div className="ProgressBar-container">
+            <div className="ProgressBar"></div>
+          </div>
+          <div className="SectionLabel">
+            The progress bar should move from left to right smoothly.
+          </div>
+        </section>
+
+        <section>
+          <div className="Spinners">
+            <div className="Spinner-container Spinner-1">
+              <div className="Spinner"></div>
+            </div>
+
+            <div className="Spinner-container Spinner-2">
+              <div className="Spinner"></div>
+            </div>
+
+            <div className="Spinner-container Spinner-3">
+              <div className="Spinner"></div>
+            </div>
+
+            <div className="Spinner-container Spinner-4">
+              <div className="Spinner"></div>
+            </div>
+          </div>
+          <div className="SectionLabel">
+            The spinners should rotate &amp; change color smoothly.
+          </div>
+        </section>
+      </main>
+      <footer>
+        <div className="SectionLabel FooterLabel">
+          There are no CSS animations on this page.
+        </div>
+
+        <div className="Bundler-container">
+          <div className="Bundler">{productName}</div>
+          <div className="Bundler-updateRate">
+            Saving a css file every&nbsp;
+            <span className="highlight">
+              <span className="interval"></span>ms
+            </span>
+          </div>
+        </div>
+      </footer>
+    </>
+  );
+};