Use geo tag, especially to avoid MySQL

ee/spec/features/geo_node_spec.rb

 require 'spec_helper'
 
-describe 'GEO Nodes' do
+describe 'GEO Nodes', :geo do
   include ::EE::GeoHelpers
 
   set(:user) { create(:user) }

ee/spec/features/projects/geo_clone_instructions_spec.rb

 require 'rails_helper'
 
-describe 'Geo clone instructions', :js do
+describe 'Geo clone instructions', :geo, :js do
   include Devise::Test::IntegrationHelpers
   include ::EE::GeoHelpers
 

ee/spec/features/read_only_spec.rb

 require 'rails_helper'
 
-describe 'Geo read-only message' do
+describe 'Geo read-only message', :geo do
   include ::EE::GeoHelpers
 
   set(:user) { create(:user) }

ee/spec/helpers/application_helper_spec.rb

@@ -5,7 +5,7 @@ require 'spec_helper'
 describe ApplicationHelper do
   include EE::GeoHelpers
 
-  describe '#read_only_message' do
+  describe '#read_only_message', :geo do
     context 'when not in a Geo secondary' do
       it 'returns a fallback message if database is readonly' do
         expect(Gitlab::Database).to receive(:read_only?) { true }