diff --git a/app/commands/decidim/half_signup/admin/update_auth_settings.rb b/app/commands/decidim/half_signup/admin/update_auth_settings.rb
index bc2669f..16cfc96 100644
--- a/app/commands/decidim/half_signup/admin/update_auth_settings.rb
+++ b/app/commands/decidim/half_signup/admin/update_auth_settings.rb
@@ -17,7 +17,7 @@ def initialize(auth_settings, form)
 
         def call
           return broadcast(:invalid) if form.invalid?
-          return broadcast(:sms_service_not_configured) if form.enable_partial_sms_signup && !check_sms_service
+          return broadcast(:sms_service_not_configured) if form.enable_partial_sms_signup && !sms_gateway_service_configured?
 
           update_auth_settings
           broadcast(:ok)
@@ -27,7 +27,7 @@ def call
 
         attr_reader :form
 
-        def check_sms_service
+        def sms_gateway_service_configured?
           Decidim.config.sms_gateway_service.present?
         end
 
diff --git a/spec/commands/decidim/half_signup/admin/update_auth_settings_spec.rb b/spec/commands/decidim/half_signup/admin/update_auth_settings_spec.rb
index 2bcc95d..54a8f65 100644
--- a/spec/commands/decidim/half_signup/admin/update_auth_settings_spec.rb
+++ b/spec/commands/decidim/half_signup/admin/update_auth_settings_spec.rb
@@ -16,12 +16,14 @@
     )
   end
   let(:command) { described_class.new(auth_settings, form) }
-  let(:sms_gateway_service) { "Decidim::Verifications::Sms::ExampleGateway" }
+  let(:sms_gateway_service) { instance_double(Decidim::Verifications::Sms::ExampleGateway, present?: true) }
 
   before do
-    Decidim.configure do |config|
-      config.sms_gateway_service = sms_gateway_service
-    end
+    allow(Decidim.config).to receive(:sms_gateway_service).and_return(sms_gateway_service)
+  end
+
+  after do
+    allow(Decidim.config).to receive(:sms_gateway_service).and_call_original
   end
 
   describe "#call" do
diff --git a/spec/commands/decidim/half_signup/send_verification_spec.rb b/spec/commands/decidim/half_signup/send_verification_spec.rb
index 55c2cdf..84ca16d 100644
--- a/spec/commands/decidim/half_signup/send_verification_spec.rb
+++ b/spec/commands/decidim/half_signup/send_verification_spec.rb
@@ -34,6 +34,10 @@
     end
   end
 
+  after do
+    allow(Decidim.config).to receive(:sms_gateway_service).and_call_original
+  end
+
   describe "when email" do
     let!(:auth_method) { "email" }
 
diff --git a/spec/controllers/decidim/half_signup/quick_auth_controller_spec.rb b/spec/controllers/decidim/half_signup/quick_auth_controller_spec.rb
index cfcdd47..c504750 100644
--- a/spec/controllers/decidim/half_signup/quick_auth_controller_spec.rb
+++ b/spec/controllers/decidim/half_signup/quick_auth_controller_spec.rb
@@ -36,9 +36,11 @@
     request.env["devise.mapping"] = ::Devise.mappings[:user]
     request.session[:auth_attempt] = auth_session
 
-    Decidim.configure do |config|
-      config.sms_gateway_service = sms_gateway_service
-    end
+    allow(Decidim.config).to receive(:sms_gateway_service).and_return(sms_gateway_service)
+  end
+
+  after do
+    allow(Decidim.config).to receive(:sms_gateway_service).and_call_original
   end
 
   describe "GET #sms" do
diff --git a/spec/system/add_update_phone_number_spec.rb b/spec/system/add_update_phone_number_spec.rb
index 536584c..ed665d1 100644
--- a/spec/system/add_update_phone_number_spec.rb
+++ b/spec/system/add_update_phone_number_spec.rb
@@ -15,9 +15,11 @@
     switch_to_host(organization.host)
     visit decidim.account_path
 
-    Decidim.configure do |config|
-      config.sms_gateway_service = sms_gateway_service
-    end
+    allow(Decidim.config).to receive(:sms_gateway_service).and_return(sms_gateway_service)
+  end
+
+  after do
+    allow(Decidim.config).to receive(:sms_gateway_service).and_call_original
   end
 
   context "when sms_auth is not enabled" do
diff --git a/spec/system/admin_manage_auth_settings_spec.rb b/spec/system/admin_manage_auth_settings_spec.rb
index 21390a7..c7ff933 100644
--- a/spec/system/admin_manage_auth_settings_spec.rb
+++ b/spec/system/admin_manage_auth_settings_spec.rb
@@ -15,9 +15,11 @@
     switch_to_host(organization.host)
     visit decidim_admin.edit_organization_path
 
-    Decidim.configure do |config|
-      config.sms_gateway_service = sms_gateway_service
-    end
+    allow(Decidim.config).to receive(:sms_gateway_service).and_return(sms_gateway_service)
+  end
+
+  after do
+    allow(Decidim.config).to receive(:sms_gateway_service).and_call_original
   end
 
   it "shows the menu in the admin panel in a correct place" do
@@ -54,41 +56,42 @@
     expect(auth_settings.enable_partial_sms_signup).to be(true)
   end
 
-  it "shows a warning message when the SMS gateway service is not configured" do
-    Decidim.configure do |config|
-      config.sms_gateway_service = nil
+  context "when sms gateway service is not present" do
+    before do
+      allow(Decidim.config).to receive(:sms_gateway_service).and_return(nil)
     end
-    click_link "Authentication settings"
-    expect(page).to have_current_path(decidim_half_signup_admin.edit_auth_setting_path(slug: "authentication_settings"))
-    expect(page).to have_css(".is-active", text: "Authentication settings")
-    expect(page.find("#auth_setting_enable_partial_sms_signup")).to be_disabled
-    expect(page).to have_content("This option is disabled please contact the host of the platform to enable it.")
-  end
-
-  it "shows an error message when the SMS gateway service is not configured if the user tries to force the change" do
-    click_link "Authentication settings"
-    expect(page).to have_current_path(decidim_half_signup_admin.edit_auth_setting_path(slug: "authentication_settings"))
-    expect(page).to have_css(".is-active", text: "Authentication settings")
-    check "Enable partial sign up and sign in using SMS verification"
-    check "Enable partial sign up and sign in using email verification"
 
-    Decidim.configure do |config|
-      config.sms_gateway_service = nil
+    it "shows a warning message when the SMS gateway service is not configured" do
+      click_link "Authentication settings"
+      expect(page).to have_current_path(decidim_half_signup_admin.edit_auth_setting_path(slug: "authentication_settings"))
+      expect(page).to have_css(".is-active", text: "Authentication settings")
+      expect(page.find("#auth_setting_enable_partial_sms_signup")).to be_disabled
+      expect(page).to have_content("This option is disabled please contact the host of the platform to enable it.")
     end
 
-    click_button "Update"
-    expect(page).to have_current_path(decidim_half_signup_admin.edit_auth_setting_path(slug: "authentication_settings"))
-    within ".callout-wrapper" do
-      expect(page).not_to have_content("Organization updated successfully.")
-      expect(page).to have_content("The SMS gateway service is not defined.")
-    end
-    expect(page).to have_content("Settings available through code")
-    within "code" do
-      expect(page).to have_content("Decidim::HalfSignup.configure do |config|")
+    it "shows an error message when the SMS gateway service is not configured if the user tries to force the change" do
+      click_link "Authentication settings"
+      expect(page).to have_current_path(decidim_half_signup_admin.edit_auth_setting_path(slug: "authentication_settings"))
+      expect(page).to have_css(".is-active", text: "Authentication settings")
+      check "Enable partial sign up and sign in using SMS verification"
+      check "Enable partial sign up and sign in using email verification"
+
+      allow(Decidim.config).to receive(:sms_gateway_service).and_return(nil)
+
+      click_button "Update"
+      expect(page).to have_current_path(decidim_half_signup_admin.edit_auth_setting_path(slug: "authentication_settings"))
+      within ".callout-wrapper" do
+        expect(page).not_to have_content("Organization updated successfully.")
+        expect(page).to have_content("The SMS gateway service is not defined.")
+      end
+      expect(page).to have_content("Settings available through code")
+      within "code" do
+        expect(page).to have_content("Decidim::HalfSignup.configure do |config|")
+      end
+      expect(page.find("#auth_setting_enable_partial_sms_signup")).not_to be_checked
+      auth_settings = Decidim::HalfSignup::AuthSetting.last
+      expect(auth_settings.enable_partial_email_signup).to be(false)
+      expect(auth_settings.enable_partial_sms_signup).to be(false)
     end
-    expect(page.find("#auth_setting_enable_partial_sms_signup")).not_to be_checked
-    auth_settings = Decidim::HalfSignup::AuthSetting.last
-    expect(auth_settings.enable_partial_email_signup).to be(false)
-    expect(auth_settings.enable_partial_sms_signup).to be(false)
   end
 end
diff --git a/spec/system/budgets_view_spec.rb b/spec/system/budgets_view_spec.rb
index 01cf80c..5d8e445 100644
--- a/spec/system/budgets_view_spec.rb
+++ b/spec/system/budgets_view_spec.rb
@@ -12,9 +12,11 @@
   before do
     switch_to_host(organization.host)
 
-    Decidim.configure do |config|
-      config.sms_gateway_service = sms_gateway_service
-    end
+    allow(Decidim.config).to receive(:sms_gateway_service).and_return(sms_gateway_service)
+  end
+
+  after do
+    allow(Decidim.config).to receive(:sms_gateway_service).and_call_original
   end
 
   context "with multiple budgets" do