gistfile1.txt

diff --git a/lib/minitest/excludes.rb b/lib/minitest/excludes.rb
index fe1fc98..0eb15cb 100644
--- a/lib/minitest/excludes.rb
+++ b/lib/minitest/excludes.rb
@@ -40,7 +40,7 @@ class MiniTest::Unit::TestCase
   # Exclude a test from a testcase. This is intended to be used by
   # exclusion files.
 
-  def self.exclude name, reason
+  def self.exclude name, reason = nil
     return warn "Method #{self}##{name} is not defined" unless
       method_defined? name