diff --git a/test/integration/client-navigation/pages/head-duplicate-default-keys.js b/test/integration/client-navigation/pages/head-duplicate-default-keys.js
index 9f81993679fa0..b3848d0559e8d 100644
--- a/test/integration/client-navigation/pages/head-duplicate-default-keys.js
+++ b/test/integration/client-navigation/pages/head-duplicate-default-keys.js
@@ -6,17 +6,14 @@ export default () => (
     <Head>
       {/* this will not render */}
       <meta charSet="utf-8" key="charSet" />
-      {/* this will override the default (same key as the default) */}
-      <meta charSet="iso-8859-5" key="charSet" />
-
       {/* this will not render */}
-      <meta name="viewport" content="width=device-width" key="viewport" />
-      {/* this will override the default (same key as the default) */}
-      <meta
-        name="viewport"
-        content="width=device-width,initial-scale=1"
-        key="viewport"
-      />
+      <meta charSet="iso-8859-5" key="charSet" />
+      {/* this will render instead of the default */}
+      <meta name="viewport" content="width=500" key="viewport" />
+    </Head>
+    <Head>
+      {/* this will override the the above */}
+      <meta charSet="iso-8859-1" key="charSet" />
     </Head>
     <h1>Meta tags with same keys as default get deduped</h1>
   </div>
diff --git a/test/integration/client-navigation/test/rendering.js b/test/integration/client-navigation/test/rendering.js
index 8143c93a1ba22..b7679fbb45796 100644
--- a/test/integration/client-navigation/test/rendering.js
+++ b/test/integration/client-navigation/test/rendering.js
@@ -90,12 +90,12 @@ export default function(render, fetch) {
 
     test('header helper dedupes tags with the same key as the default', async () => {
       const html = await render('/head-duplicate-default-keys')
-      expect(html).toContain('<meta charSet="iso-8859-5"/>')
-      expect(html).not.toContain('<meta charSet="utf-8"/>')
-      expect(html).toContain(
-        '<meta name="viewport" content="width=device-width,initial-scale=1"/>'
-      )
-      expect(html).not.toContain('<meta name="width=device-width"/>')
+      // Expect exactly one `charSet`
+      expect((html.match(/charSet=/g) || []).length).toBe(1)
+      // Expect exactly one `viewport`
+      expect((html.match(/name="viewport"/g) || []).length).toBe(1)
+      expect(html).toContain('<meta charSet="iso-8859-1"/>')
+      expect(html).toContain('<meta name="viewport" content="width=500"/>')
     })
 
     test('header helper avoids dedupe of specific tags', async () => {
