fix travis test again

Author: codeskyblue

tests/conftest.py

@@ -1,9 +1,10 @@
 import sys
 
 collect_ignore = []
-if sys.version_info < (3, 4):
+
+if sys.version_info < (3, 6):
     collect_ignore += ["integration/test_asyncio.py",
-                       "integration/test_asyncio_coroutine.py",
                        "integration/test_tornado.py"]
-elif sys.version_info < (3, 6):
-    collect_ignore.append("integration/test_asyncio.py")
+
+if sys.version_info < (3, 4):
+    collect_ignore += ["integration/test_asyncio_coroutine.py"]