diff --git a/greentest/test__greenness.py b/greentest/test__greenness.py
new file mode 100644
index 0000000..48bcc42
--- /dev/null
+++ b/greentest/test__greenness.py
@@ -0,0 +1,45 @@
+"""Test than modules in eventlet.green package are indeed green.
+To do that spawn green server and then access it using green socket.
+If either operation would actuallu block the whole script would block and timeout.
+"""
+import unittest
+from greentest import test_support
+from eventlet.green import urllib2, BaseHTTPServer
+from eventlet.api import spawn, kill
+
+port = 18341
+
+def start_http_server():
+    server_address = ('', port)
+    BaseHTTPServer.BaseHTTPRequestHandler.protocol_version = "HTTP/1.0"
+    httpd = BaseHTTPServer.HTTPServer(server_address, BaseHTTPServer.BaseHTTPRequestHandler)
+    sa = httpd.socket.getsockname()
+    #print "Serving HTTP on", sa[0], "port", sa[1], "..."
+    httpd.request_count = 0
+    def serve():
+        while 1:
+            httpd.handle_request()
+            httpd.request_count += 1
+    return spawn(serve), httpd
+
+class TestGreenness(unittest.TestCase):
+
+    def setUp(self):
+        self.gthread, self.server = start_http_server()
+        #print 'Spawned the server'
+
+    def tearDown(self):
+        self.server.server_close()
+        kill(self.gthread)
+
+    def test_urllib2(self):
+        self.assertEqual(self.server.request_count, 0)
+        try:
+            urllib2.urlopen('http://127.0.0.1:%s' % port)
+            assert False, 'should not get there'
+        except urllib2.HTTPError, ex:
+            assert ex.code == 501, `ex`
+        self.assertEqual(self.server.request_count, 1)
+
+if __name__ == '__main__':
+    test_support.run_unittest(TestGreenness)