diff --git a/spec/ruby/library/rubygems/gem/bin_path_spec.rb b/spec/ruby/library/rubygems/gem/bin_path_spec.rb
index 67b3e042c2..ab4ea9397e 100644
--- a/spec/ruby/library/rubygems/gem/bin_path_spec.rb
+++ b/spec/ruby/library/rubygems/gem/bin_path_spec.rb
@@ -11,7 +11,7 @@ describe "Gem.bin_path" do
     ENV['BUNDLE_GEMFILE'] = @bundle_gemfile
   end
 
-  platform_is_not :windows do
+  guard_not -> { platform_is :windows } do
     it "finds executables of default gems, which are the only files shipped for default gems" do
       # For instance, Gem.bin_path("bundler", "bundle") is used by rails new