update test part 1

spec/features/form/accessible_autocomplete_spec.rb

@@ -23,11 +23,11 @@ RSpec.describe "Accessible Automcomplete" do
 
   context "when using accessible autocomplete" do
     before do
-      allow_any_instance_of(Form::Question).to receive(:answer_option_synonyms).and_return(nil)
+      allow_any_instance_of(Form::Question).to receive(:answer_option_synonyms).and_call_original
       allow_any_instance_of(Form::Question).to receive(:answer_option_synonyms).with("E08000003").and_return("synonym")
-      allow_any_instance_of(Form::Question).to receive(:answer_option_append).and_return(nil)
+      allow_any_instance_of(Form::Question).to receive(:answer_option_append).and_call_original
       allow_any_instance_of(Form::Question).to receive(:answer_option_append).with("E08000003").and_return(" (append)")
-      allow_any_instance_of(Form::Question).to receive(:answer_option_hint).and_return(nil)
+      allow_any_instance_of(Form::Question).to receive(:answer_option_hint).and_call_original
       allow_any_instance_of(Form::Question).to receive(:answer_option_hint).with("E08000003").and_return("hint")
       visit("/logs/#{case_log.id}/accessible-select")
     end