diff --git a/test/ruby/envutil.rb b/test/ruby/envutil.rb
index e0d8cf81be..639aee00ca 100644
--- a/test/ruby/envutil.rb
+++ b/test/ruby/envutil.rb
@@ -15,15 +15,32 @@ module EnvUtil
       end
       ruby = File.join("..", ruby)
     end
-    begin
-      require "rbconfig"
+    if defined?(RbConfig.ruby)
       File.join(
         Config::CONFIG["bindir"],
 	Config::CONFIG["ruby_install_name"] + Config::CONFIG["EXEEXT"]
-      )
-    rescue LoadError
+                )
+    else
       "ruby"
     end
   end
   module_function :rubybin
 end
+
+begin
+  require 'rbconfig'
+rescue LoadError
+else
+  module RbConfig
+    @ruby = EnvUtil.rubybin
+    class << self
+      undef ruby if defined?(ruby)
+      attr_reader :ruby
+    end
+    dir = File.dirname(ruby)
+    name = File.basename(ruby, CONFIG['EXEEXT'])
+    CONFIG['bindir'] = dir
+    CONFIG['ruby_install_name'] = name
+    CONFIG['RUBY_INSTALL_NAME'] = name
+  end
+end
diff --git a/test/webrick/test_filehandler.rb b/test/webrick/test_filehandler.rb
index 2c7d97fa70..a31dc07dd6 100644
--- a/test/webrick/test_filehandler.rb
+++ b/test/webrick/test_filehandler.rb
@@ -1,7 +1,7 @@
 require "test/unit"
+require File.join(File.dirname(__FILE__), "utils.rb")
 require "webrick"
 require "stringio"
-require File.join(File.dirname(__FILE__), "utils.rb")
 
 class WEBrick::TestFileHandler < Test::Unit::TestCase
   def default_file_handler(filename)