diff --git a/app/assets/stylesheets/pages/pipelines.scss b/app/assets/stylesheets/pages/pipelines.scss
index fdd17af35fb..7a47e0a2836 100644
--- a/app/assets/stylesheets/pages/pipelines.scss
+++ b/app/assets/stylesheets/pages/pipelines.scss
@@ -978,7 +978,6 @@ button.mini-pipeline-graph-dropdown-toggle {
  * Top arrow in the dropdown in the mini pipeline graph
  */
 .mini-pipeline-graph-dropdown-menu {
-  z-index: 200;
 
   &::before,
   &::after {
diff --git a/changelogs/unreleased/ci-dropdown-hidden-bug.yml b/changelogs/unreleased/ci-dropdown-hidden-bug.yml
new file mode 100644
index 00000000000..6910f04a6d5
--- /dev/null
+++ b/changelogs/unreleased/ci-dropdown-hidden-bug.yml
@@ -0,0 +1,5 @@
+---
+title: Don't hide CI dropdown behind diff summary
+merge_request:
+author: gfyoung
+type: fixed