Add html response to #test_report

app/controllers/projects/pipelines_controller.rb

@@ -156,15 +156,22 @@ class Projects::PipelinesController < Projects::ApplicationController
   def test_report
     return unless Feature.enabled?(:junit_pipeline_view, project)
 
-    if pipeline_test_report == :error
-      render json: { status: :error_parsing_report }
-      return
+    respond_to do |format|
+      format.html do
+        render 'show'
       end
 
+      format.json do
+        if pipeline_test_report == :error
+          render json: { status: :error_parsing_report }
+        else
           render json: TestReportSerializer
             .new(current_user: @current_user)
             .represent(pipeline_test_report)
         end
+      end
+    end
+  end
 
   private