bin/testunit in cli-kit-3.3.0 vs bin/testunit in cli-kit-4.0.0

@@ -7,15 +7,15 @@
 CLI_TEST_ROOT = root + '/test'
 
 $LOAD_PATH.unshift(CLI_TEST_ROOT)
 
 def test_files
-  Dir.glob(CLI_TEST_ROOT + "/**/*_test.rb")
+  Dir.glob(CLI_TEST_ROOT + '/**/*_test.rb')
 end
 
 if ARGV.empty?
   test_files.each { |f| require(f) }
-  exit 0
+  exit(0)
 end
 
 # A list of files is presumed to be specified
 ARGV.each do |a|
   require a.sub(%r{^test/}, '')