diff --git a/src/server/index.jsx b/src/server/index.jsx
index f87989a1fd3..5adbb6ad40a 100644
--- a/src/server/index.jsx
+++ b/src/server/index.jsx
@@ -341,7 +341,7 @@ server.get(
           `https://www.bbcweb3hytmzhn5d532owbu6oqadra5z3ar726vq5kgwwn6aucdccrad.onion${urlPath}`,
         );
 
-        const allVaryHeaders = ['X-country'];
+        const allVaryHeaders = ['X-Country'];
         const mvtVaryHeaders = !isAmp && getMvtVaryHeaders(mvtExperiments);
         if (mvtVaryHeaders) allVaryHeaders.push(mvtVaryHeaders);
 
diff --git a/src/server/index.test.jsx b/src/server/index.test.jsx
index 1f40db348c2..682b9d7be5a 100644
--- a/src/server/index.test.jsx
+++ b/src/server/index.test.jsx
@@ -1465,7 +1465,7 @@ describe('Server HTTP Headers - Page Endpoints', () => {
     const { header } = await makeRequest('/mundo/c0000000001o');
 
     expect(header.vary).toBe(
-      'X-country, mvt-simorgh_dark_mode, Accept-Encoding',
+      'X-Country, mvt-simorgh_dark_mode, Accept-Encoding',
     );
   });
 
@@ -1477,7 +1477,7 @@ describe('Server HTTP Headers - Page Endpoints', () => {
 
     const { header } = await makeRequest('/mundo/articles/c0000000001o');
 
-    expect(header.vary).toBe('X-country, Accept-Encoding');
+    expect(header.vary).toBe('X-Country, Accept-Encoding');
   });
 
   it(`should not add mvt experiment header names to vary if on AMP`, async () => {
@@ -1489,7 +1489,7 @@ describe('Server HTTP Headers - Page Endpoints', () => {
 
     const { header } = await makeRequest('/mundo/articles/c0000000001o');
 
-    expect(header.vary).toBe('X-country, Accept-Encoding');
+    expect(header.vary).toBe('X-Country, Accept-Encoding');
   });
 
   it(`should set isUK value to true when 'x-bbc-edge-isuk' is set to 'yes'`, async () => {