1 files changed, 6 insertions, 0 deletions
diff --git a/rubytest.rb b/rubytest.rb
index 20032e303e..b1006c420c 100644
--- a/rubytest.rb
+++ b/rubytest.rb
@@ -3,6 +3,12 @@
 require 'rbconfig'
 include Config
 
+unless File.exist? "./#{CONFIG['ruby_install_name']}"
+  print "./#{CONFIG['ruby_install_name']} is not found.\n"
+  print "Try `make' first, then `make test', please.\n"
+  exit 0
+end
+
 if File.exist? CONFIG['LIBRUBY_SO']
   case RUBY_PLATFORM
   when /-hpux/