4 files changed, 14 insertions, 1 deletions
diff --git a/lib/api/branches.rb b/lib/api/branches.rb
index c65de90cca2..34f136948c2 100644
--- a/lib/api/branches.rb
+++ b/lib/api/branches.rb
@@ -137,7 +137,7 @@ module API
       delete ":id/repository/merged_branches" do
         DeleteMergedBranchesService.new(user_project, current_user).async_execute
 
-        status(200)
+        accepted!
       end
     end
   end
diff --git a/lib/api/helpers.rb b/lib/api/helpers.rb
index d0efa7b993b..72d2b320077 100644
--- a/lib/api/helpers.rb
+++ b/lib/api/helpers.rb
@@ -209,6 +209,10 @@ module API
       render_api_error!('204 No Content', 204)
     end
 
+    def accepted!
+      render_api_error!('202 Accepted', 202)
+    end
+
     def render_validation_error!(model)
       if model.errors.any?
         render_api_error!(model.errors.messages || '400 Bad Request', 400)
diff --git a/lib/api/projects.rb b/lib/api/projects.rb
index e7b891bd92e..b89bddc7e29 100644
--- a/lib/api/projects.rb
+++ b/lib/api/projects.rb
@@ -282,6 +282,8 @@ module API
       delete ":id" do
         authorize! :remove_project, user_project
         ::Projects::DestroyService.new(user_project, current_user, {}).async_execute
+
+        accepted!
       end
 
       desc 'Mark this project as forked from another'
diff --git a/lib/api/v3/branches.rb b/lib/api/v3/branches.rb
index 733c6b21be5..51eb566cf7d 100644
--- a/lib/api/v3/branches.rb
+++ b/lib/api/v3/branches.rb
@@ -18,6 +18,13 @@ module API
 
           present branches, with: ::API::Entities::RepoBranch, project: user_project
         end
+
+        desc 'Delete all merged branches'
+        delete ":id/repository/merged_branches" do
+          DeleteMergedBranchesService.new(user_project, current_user).async_execute
+
+          status(200)
+        end
       end
     end
   end