diff --git a/build-ci.rb b/build-ci.rb
index 81b76d2bdc6..b29cbf14dfa 100755
--- a/build-ci.rb
+++ b/build-ci.rb
@@ -99,7 +99,7 @@ def self.current_projects
   #
   # @param [String] message
   #
-  # @return [undefined]
+  # @return [void]
   def self.log(message)
     $stderr.puts(message)
   end
@@ -151,7 +151,7 @@ def bundle_install
 
   # Setup the test app
   #
-  # @return [undefined]
+  # @return [void]
   def setup_test_app
     system(%w[bundle exec rake test_app]) || fail('Failed to setup the test app')
   end
@@ -185,7 +185,7 @@ def system(arguments)
 
   # Change to subproject directory and execute block
   #
-  # @return [undefined]
+  # @return [void]
   def chdir(&block)
     Dir.chdir(ROOT.join(name), &block)
   end
diff --git a/core/app/models/spree/wallet/add_payment_sources_to_wallet.rb b/core/app/models/spree/wallet/add_payment_sources_to_wallet.rb
index 6e1d359be1f..8d57db428bd 100644
--- a/core/app/models/spree/wallet/add_payment_sources_to_wallet.rb
+++ b/core/app/models/spree/wallet/add_payment_sources_to_wallet.rb
@@ -9,7 +9,7 @@ def initialize(order)
   # This is called after an order transistions to complete and should save the
   # order's payment source/s in the user's "wallet" for future use.
   #
-  # @return [undefined]
+  # @return [void]
   def add_to_wallet
     if !order.temporary_credit_card &&
        order.user_id &&