diff --git a/test/test_protocol.rb b/test/test_protocol.rb
index 8d246bd..0144c66 100644
--- a/test/test_protocol.rb
+++ b/test/test_protocol.rb
@@ -1,7 +1,7 @@
 require 'common'
 
 class ProtocolTest < Net::SFTP::TestCase
-  1.upto(6) do |version|
+  1.upto(5) do |version|
     define_method("test_load_version_#{version}_should_return_v#{version}_driver") do
       session = stub('session', :logger => nil)
       driver = Net::SFTP::Protocol.load(session, version)
@@ -9,9 +9,15 @@ class ProtocolTest < Net::SFTP::TestCase
     end
   end
 
+  def test_load_version_6_should_return_v6_driver
+    session = stub('session', :logger => nil)
+    driver = Net::SFTP::Protocol.load(session, 6)
+    assert_instance_of Net::SFTP::Protocol.const_get("V06")::Extended, driver
+  end
+
   def test_load_version_7_should_be_unsupported
     assert_raises(NotImplementedError) do
       Net::SFTP::Protocol.load(stub('session'), 7)
     end
   end
-end
\ No newline at end of file
+end