diff --git a/lib/oauth2_google_token_info_v3/https_request.rb b/lib/oauth2_google_token_info_v3/https_request.rb
index cb8f8ba..caf1a58 100644
--- a/lib/oauth2_google_token_info_v3/https_request.rb
+++ b/lib/oauth2_google_token_info_v3/https_request.rb
@@ -44,7 +44,7 @@ def response
     end
 
     def valid?
-      !!response[:error_description]
+      response.key?(:error_description)
     end
 
     def subject