diff --git a/tests/unit/select_connection_ioloop_tests.py b/tests/unit/select_connection_ioloop_tests.py
index 647feda6158dfcaf2243367928bff1576ddefd6d_dGVzdHMvdW5pdC9zZWxlY3RfY29ubmVjdGlvbl9pb2xvb3BfdGVzdHMucHk=..c02b06de52accdc68408175f6d8534cc619f8252_dGVzdHMvdW5pdC9zZWxlY3RfY29ubmVjdGlvbl9pb2xvb3BfdGVzdHMucHk= 100644
--- a/tests/unit/select_connection_ioloop_tests.py
+++ b/tests/unit/select_connection_ioloop_tests.py
@@ -33,7 +33,7 @@
 
 class IOLoopBaseTest(unittest.TestCase):
     SELECT_POLLER = None
-    TIMEOUT = 1.0
+    TIMEOUT = 1.5
 
     def setUp(self):
         select_type_patch = mock.patch.multiple(