1 files changed, 1 insertions, 1 deletions
diff --git a/Library/Homebrew/test/cmd/custom-external-command_spec.rb b/Library/Homebrew/test/cmd/custom-external-command_spec.rb
index d649786ec..8e6ffe2ff 100644
--- a/Library/Homebrew/test/cmd/custom-external-command_spec.rb
+++ b/Library/Homebrew/test/cmd/custom-external-command_spec.rb
@@ -4,7 +4,7 @@ describe "brew custom-external-command", :integration_test do
       cmd = "custom-external-command-#{rand}"
       file = path/"brew-#{cmd}"
 
-      file.write <<-EOS.undent
+      file.write <<~EOS
         #!/bin/sh
         echo 'I am #{cmd}.'
       EOS