diff --git a/daphne/testing.py b/daphne/testing.py
index bc71aab..5a61221 100644
--- a/daphne/testing.py
+++ b/daphne/testing.py
@@ -126,9 +126,11 @@ class DaphneProcess(multiprocessing.Process):
             # This is necessary because asyncio behaves badly with multiprocessing.
             from twisted.internet import asyncioreactor
             import sys
+
             current_reactor = sys.modules.get("twisted.internet.reactor")
             if isinstance(current_reactor, asyncioreactor.AsyncioSelectorReactor):
                 import asyncio
+
                 current_reactor._asyncioEventloop.close()
                 asyncio.set_event_loop(asyncio.new_event_loop())
                 current_reactor._asyncioEventloop = asyncio.get_event_loop()