use test server for testing

Author: amueller

openml/testing.py

@@ -28,6 +28,7 @@ def setUp(self):
         self.cached = True
         # amueller's read/write key that he will throw away later
         openml.config.apikey = "610344db6388d9ba34f6db45a3cf71de"
+        openml.config.server = "http://test.openml.org/api/v1/xml"
         openml.config.set_cache_directory(self.workdir, self.workdir)
 
     def tearDown(self):