diff --git a/lib/tzinfo.rb b/lib/tzinfo.rb
index 8a80447e..6949127b 100644
--- a/lib/tzinfo.rb
+++ b/lib/tzinfo.rb
@@ -8,8 +8,7 @@ module TZInfo
 # Object#untaint is a deprecated no-op in Ruby >= 2.7 and will be removed in
 # 3.2. Add a refinement to either silence the warning, or supply the method if
 # needed.
-o = Object.new
-if [:taint, :untaint, :tainted?].none? {|m| o.respond_to?(m) } || RUBY_VERSION =~ /\A(\d+)\.(\d+)(?:\.|\z)/ && ($1 == '2' && $2.to_i >= 7 || $1.to_i >= 3)
+if !Object.new.respond_to?(:untaint) || RUBY_VERSION =~ /\A(\d+)\.(\d+)(?:\.|\z)/ && ($1 == '2' && $2.to_i >= 7 || $1.to_i >= 3)
   require_relative 'tzinfo/untaint_ext'
 end