diff --git a/app/views/projects/merge_requests/widget/open/_accept.html.haml b/app/views/projects/merge_requests/widget/open/_accept.html.haml
index cb117d1908c..4cbd22150c7 100644
--- a/app/views/projects/merge_requests/widget/open/_accept.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_accept.html.haml
@@ -18,7 +18,7 @@
                   Select merge moment
               %ul.js-merge-dropdown.dropdown-menu.dropdown-menu-right{ role: 'menu' }
                 %li
-                  = link_to "#", class: "merge_when_pipeline_succeeds" do
+                  = link_to "#", class: "merge-when-pipeline-succeeds" do
                     = icon('check fw')
                     Merge when pipeline succeeds
                 %li
diff --git a/changelogs/unreleased/mr-widget-bug-fix.yml b/changelogs/unreleased/mr-widget-bug-fix.yml
new file mode 100644
index 00000000000..9af29d3927e
--- /dev/null
+++ b/changelogs/unreleased/mr-widget-bug-fix.yml
@@ -0,0 +1,5 @@
+---
+title: Fix MR widget bug that merged a MR when Merge when pipeline succeeds was clicked
+  via the dropdown
+merge_request: 10611
+author:
diff --git a/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb b/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb
index 646e7bab265..cd540ca113a 100644
--- a/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb
+++ b/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb
@@ -89,6 +89,19 @@ feature 'Merge When Pipeline Succeeds', :feature, :js do
         it_behaves_like 'Merge when pipeline succeeds activator'
       end
     end
+
+    describe 'enabling Merge when pipeline succeeds via dropdown' do
+      it 'activates the Merge when pipeline succeeds feature' do
+        click_button 'Select merge moment'
+        within('.js-merge-dropdown') do
+          click_link 'Merge when pipeline succeeds'
+        end
+
+        expect(page).to have_content "Set by #{user.name} to be merged automatically when the pipeline succeeds."
+        expect(page).to have_content "The source branch will not be removed."
+        expect(page).to have_link "Cancel automatic merge"
+      end
+    end
   end
 
   context 'when merge when pipeline succeeds is enabled' do