diff --git a/app/controllers/admin/account_recoveries_controller.rb b/app/controllers/admin/account_recoveries_controller.rb
index 6c6d02b9..f190c68f 100644
--- a/app/controllers/admin/account_recoveries_controller.rb
+++ b/app/controllers/admin/account_recoveries_controller.rb
@@ -47,7 +47,7 @@ def fail_recovery(message)
 
     def find_by_token
       @token = params[:token]
-      @user = User.find(message_verifier.verify(@token)[:id])
+      @user = User.find(message_verifier.verify(@token).symbolize_keys[:id])
       return if @user
 
       fail_recovery(t("pages_core.account_recovery.invalid_request"))
diff --git a/app/models/otp_secret.rb b/app/models/otp_secret.rb
index b112aea5..5776f3aa 100644
--- a/app/models/otp_secret.rb
+++ b/app/models/otp_secret.rb
@@ -93,7 +93,7 @@ def valid_otp?(otp)
   end
 
   def verify_secret(signed)
-    payload = message_verifier.verify(signed)
+    payload = message_verifier.verify(signed).symbolize_keys
     raise "Wrong user" unless payload[:user_id] == user.id
 
     payload[:secret]
diff --git a/spec/internal/config/application.rb b/spec/internal/config/application.rb
index 9fae1d5e..717eb9ad 100644
--- a/spec/internal/config/application.rb
+++ b/spec/internal/config/application.rb
@@ -16,7 +16,12 @@
 module Internal
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 7.0
+    config.load_defaults 7.1
+
+    # Please, add to the `ignore` list any other `lib` subdirectories that do
+    # not contain `.rb` files, or that should not be reloaded or eager loaded.
+    # Common ones are `templates`, `generators`, or `middleware`, for example.
+    config.autoload_lib(ignore: %w[assets tasks])
 
     # Settings in config/environments/* take precedence over those
     # specified here.  Application configuration should go into files
diff --git a/spec/internal/config/environments/test.rb b/spec/internal/config/environments/test.rb
index ca41ea9c..1b1e3f3d 100644
--- a/spec/internal/config/environments/test.rb
+++ b/spec/internal/config/environments/test.rb
@@ -26,7 +26,7 @@
   config.action_controller.perform_caching = false
 
   # Raise exceptions instead of rendering exception templates.
-  config.action_dispatch.show_exceptions = false
+  config.action_dispatch.show_exceptions = :none
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false