diff --git a/asm/cstruct.rb b/asm/cstruct.rb
index 22a2d9c..9db42bc 100644
--- a/asm/cstruct.rb
+++ b/asm/cstruct.rb
@@ -327,8 +327,8 @@ if $0 == __FILE__
   puts MachHeader::MemberSizes.inspect
   puts "# of MachHeader members: " + MachHeader.size.to_s + ", size in bytes: " + MachHeader.bytesize.to_s
   mh = MachHeader.new(0xfeedface, 7, 3, "foobar")
-  %w[magic, cputype, cpusubtype, segname].each do |field|
-    puts "#{field}(#{MachHeader.sizeof(field.to_sym)}):      " + mh[field.to_sym].inspect
+  %w[magic cputype cpusubtype segname].each do |field|
+    puts "#{field}(#{MachHeader.sizeof(field.to_sym)}):      #{mh[field.to_sym].inspect}"
   end
   puts mh.pack_pattern.inspect
   binstr = mh.serialize
diff --git a/test/test.rb b/test/test.rb
index 2c945de..e84f845 100755
--- a/test/test.rb
+++ b/test/test.rb
@@ -10,6 +10,7 @@ require 'build'
 def main
   func = ARGV.shift
   outdir = ARGV.shift || '.'
+  Dir.mkdir(outdir) unless File.exists?(outdir)
   binformat = (ARGV.shift || 'elf').downcase
   format = (ARGV.shift || 'asm').downcase
   platform = `uname -s`.chomp.downcase