diff --git a/lib/googleauth.rb b/lib/googleauth.rb
index c7cfe45..ca9b750 100644
--- a/lib/googleauth.rb
+++ b/lib/googleauth.rb
@@ -62,9 +62,14 @@ END
         json_key = MultiJson.load(json_key_io.read)
         fail "the json is missing the #{key} field" unless json_key.key?('type')
         type = json_key['type']
-        return json_key, ServiceAccountCredentials if type == 'service_account'
-        return [json_key, UserRefreshCredentials] if type == 'authorized_user'
-        fail "credentials type '#{type}' is not supported"
+        case type
+        when 'service_account'
+          [json_key, ServiceAccountCredentials]
+        when 'authorized_user'
+          [json_key, UserRefreshCredentials]
+        else
+          fail "credentials type '#{type}' is not supported"
+        end
       end
     end
 
@@ -82,9 +87,8 @@ END
     # @param scope [string|array|nil] the scope(s) to access
     # @param options [hash] allows override of the connection being used
     def get_application_default(scope = nil, options = {})
-      creds = DefaultCredentials.from_env(scope)
-      return creds unless creds.nil?
-      creds = DefaultCredentials.from_well_known_path(scope)
+      creds = DefaultCredentials.from_env(scope) ||
+              DefaultCredentials.from_well_known_path(scope)
       return creds unless creds.nil?
       fail NOT_FOUND_ERROR unless GCECredentials.on_gce?(options)
       GCECredentials.new
diff --git a/spec/googleauth/signet_spec.rb b/spec/googleauth/signet_spec.rb
index 60da4fd..884e2fe 100644
--- a/spec/googleauth/signet_spec.rb
+++ b/spec/googleauth/signet_spec.rb
@@ -45,8 +45,7 @@ describe Signet::OAuth2::Client do
       scope: 'https://www.googleapis.com/auth/userinfo.profile',
       issuer: 'app@example.com',
       audience: 'https://accounts.google.com/o/oauth2/token',
-      signing_key: @key
-      )
+      signing_key: @key)
   end
 
   def make_auth_stubs(opts)