diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 81c67ec8592c7e664dee23bced427bace59c86a2..758ac0c2d1662d4cec01321afef76a80e6a062f8 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+require 'grpc/auth/compute_engine.rb'
+require 'grpc/auth/service_account.rb'
 require 'grpc/errors'
 require 'grpc/grpc'
 require 'grpc/logconfig'
diff --git a/src/ruby/lib/grpc/auth/signet.rb b/src/ruby/lib/grpc/auth/signet.rb
index ba1a3a8d8fd7fddc8a5880846f458ae30ef5a089..1a2e5644e218e3b0b81059fc3e264daba9a2cd9c 100644
--- a/src/ruby/lib/grpc/auth/signet.rb
+++ b/src/ruby/lib/grpc/auth/signet.rb
@@ -30,6 +30,7 @@
 require 'signet/oauth_2/client'
 
 module Signet
+  # Signet::OAuth2 supports OAuth2 authentication.
   module OAuth2
     AUTH_METADATA_KEY = :Authorization
     # Signet::OAuth2::Client creates an OAuth2 client
diff --git a/src/ruby/spec/auth/apply_auth_examples.rb b/src/ruby/spec/auth/apply_auth_examples.rb
index f626c54410ad669c5b6290792c35df491502b5a3..09b393026f02f888c13e3d5ff13492e28d8d6d06 100644
--- a/src/ruby/spec/auth/apply_auth_examples.rb
+++ b/src/ruby/spec/auth/apply_auth_examples.rb
@@ -43,7 +43,6 @@ end
 WANTED_AUTH_KEY = :Authorization
 
 shared_examples 'apply/apply! are OK' do
-
   # tests that use these examples need to define
   #
   # @client which should be an auth client