diff --git a/app/views/projects/diffs/_file_header.html.haml b/app/views/projects/diffs/_file_header.html.haml
index 1dbfe830d52bd09e99c8f7237d0cb00f636352d0..f809c52c3678e5a5e2ae201d646b9544f9923096 100644
--- a/app/views/projects/diffs/_file_header.html.haml
+++ b/app/views/projects/diffs/_file_header.html.haml
@@ -10,10 +10,10 @@
 
     - if diff_file.renamed_file
       - old_path, new_path = mark_inline_diffs(diff_file.old_path, diff_file.new_path)
-      %strong.file-title-name.has-tooltip{ data: { title: old_path, container: 'body' } }
+      %strong.file-title-name.has-tooltip{ data: { title: diff_file.old_path, container: 'body' } }
         = old_path
       →
-      %strong.file-title-name.has-tooltip{ data: { title: new_path, container: 'body' } }
+      %strong.file-title-name.has-tooltip{ data: { title: diff_file.new_path, container: 'body' } }
         = new_path
     - else
       %strong.file-title-name.has-tooltip{ data: { title: diff_file.new_path, container: 'body' } }
diff --git a/changelogs/unreleased/28366-renamed-file-tooltip-contains-html.yml b/changelogs/unreleased/28366-renamed-file-tooltip-contains-html.yml
new file mode 100644
index 0000000000000000000000000000000000000000..faf1e89ed9408297650b1f922585b3355b51bbd6
--- /dev/null
+++ b/changelogs/unreleased/28366-renamed-file-tooltip-contains-html.yml
@@ -0,0 +1,4 @@
+---
+title: Remove markup that was showing in tooltip for renamed files
+merge_request: 9374
+author: