diff --git a/spec/controllers/application_controller_spec.rb b/spec/controllers/application_controller_spec.rb
index d6e4f672..26332f6b 100644
--- a/spec/controllers/application_controller_spec.rb
+++ b/spec/controllers/application_controller_spec.rb
@@ -43,14 +43,14 @@ describe ApplicationController do
 
       context "when using the 'custom_locale' parameter" do
         it 'overwrites the session' do
-          expect(session).to receive(:[]=).with(:locale, locale.to_s)
+          expect(session).to receive(:[]=).with(:locale, locale)
           get :welcome, params: {custom_locale: locale}
         end
       end
 
       context "when using the 'locale' parameter" do
         it 'overwrites the session' do
-          expect(session).to receive(:[]=).with(:locale, locale.to_s)
+          expect(session).to receive(:[]=).with(:locale, locale)
           get :welcome, params: {locale: locale}
         end
       end
diff --git a/spec/controllers/sessions_controller_spec.rb b/spec/controllers/sessions_controller_spec.rb
index f4edd27d..df3a7351 100644
--- a/spec/controllers/sessions_controller_spec.rb
+++ b/spec/controllers/sessions_controller_spec.rb
@@ -86,9 +86,9 @@ describe SessionsController do
 
       it 'sets the specified locale' do
         expect(controller).to receive(:switch_locale).and_call_original
-        i18n = class_double I18n, locale: locale.to_s
+        i18n = class_double I18n, locale: locale
         allow(I18n).to receive(:locale=).with(I18n.default_locale).and_call_original
-        allow(I18n).to receive(:locale=).with(locale.to_s).and_return(i18n)
+        allow(I18n).to receive(:locale=).with(locale).and_return(i18n)
         perform_request
         expect(i18n.locale.to_sym).to eq(locale)
       end