diff --git a/Library/Homebrew/cmd/create.rb b/Library/Homebrew/cmd/create.rb
index 9f215a0f21..26fd36b403 100644
--- a/Library/Homebrew/cmd/create.rb
+++ b/Library/Homebrew/cmd/create.rb
@@ -146,7 +146,9 @@ class FormulaCreator
         system "make install" # if this fails, try separate make/make install steps
       end
 
-      def test
+      test do
+        # `test do` will create, run in and delete a temporary directory.
+        #
         # This test will fail and we won't accept that! It's enough to just replace
         # "false" with the main program this formula installs, but it'd be nice if you
         # were more thorough. Run the test with `brew test #{name}`.