diff --git b/lib/rubygems/vendor/timeout/lib/timeout.rb a/lib/rubygems/vendor/timeout/lib/timeout.rb
index 9f8c79204..24d877b99 100644
--- b/lib/rubygems/vendor/timeout/lib/timeout.rb
+++ a/lib/rubygems/vendor/timeout/lib/timeout.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-# Gem::Timeout long-running blocks
+# Timeout long-running blocks
 #
 # == Synopsis
 #
