diff --git a/packages/url-utils/test/unit/utils/transform-ready-to-absolute.test.js b/packages/url-utils/test/unit/utils/transform-ready-to-absolute.test.js
index 41f5cdd57..f172939fa 100644
--- a/packages/url-utils/test/unit/utils/transform-ready-to-absolute.test.js
+++ b/packages/url-utils/test/unit/utils/transform-ready-to-absolute.test.js
@@ -128,6 +128,19 @@ describe('utils: transformReadyToAbsolute()', function () {
             result.should.equal('https://site-base.com/content/media/video.mp4');
         });
 
+        it('converts media url with CDN and subdirectory in site URL', function () {
+            const storageCdn = 'https://storage.ghost.io/c/test-uuid';
+            const subdirSiteUrl = 'https://mysite.com/blog';
+            const options = {
+                staticMediaUrlPrefix: 'content/media',
+                mediaBaseUrl: storageCdn
+            };
+
+            const result = transformReadyToAbsolute('__GHOST_URL__/content/media/video.mp4', subdirSiteUrl, options);
+
+            result.should.equal('https://storage.ghost.io/c/test-uuid/content/media/video.mp4');
+        });
+
         it('uses CDN for media and site URL for files when only media CDN is configured', function () {
             const options = {
                 staticImageUrlPrefix: 'content/images',