diff --git a/tests/common.py b/tests/common.py
index e1a65800b4b..b2001a3c837 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -113,8 +113,6 @@ def get_test_home_assistant():
 @asyncio.coroutine
 def async_test_home_assistant(loop):
     """Return a Home Assistant object pointing at test config dir."""
-    loop._thread_ident = threading.get_ident()
-
     hass = ha.HomeAssistant(loop)
     INSTANCES.append(hass)