Tweak some timeouts.

src/greentest/test__backdoor.py

@@ -23,6 +23,8 @@ def readline(conn):
 
 class Test(greentest.TestCase):
 
+    __timeout__ = 10
+
     _server = None
 
     def tearDown(self):
@@ -47,7 +49,7 @@ class Test(greentest.TestCase):
         self.assertEqual(line, '')
         conn.close()
 
-    def test(self):
+    def test_multi(self):
         self._make_server()
 
         def connect():

src/greentest/test__refcount.py

@@ -140,6 +140,8 @@ def run_and_check(run_client):
 @greentest.skipOnPyPy3OnCI("Often fails with timeouts; not sure why.")
 class Test(greentest.TestCase):
 
+    __timeout__ = 10
+
     def test_clean_exit(self):
         run_and_check(True)
         run_and_check(True)