Update conftest.py

Author: gabor-boros

tests/conftest.py

@@ -3,12 +3,10 @@
 collect_ignore = []
 
 if sys.version_info < (3, 6):
-    collect_ignore += ["integration/test_asyncio.py",
-                       "integration/test_tornado.py"]
-
-if sys.version_info < (3, 4):
-    collect_ignore += ["integration/test_asyncio.py", "integration/test_asyncio_coroutine.py"]
-elif sys.version_info < (3, 6):
-    collect_ignore.append("integration/test_asyncio.py")
-    collect_ignore.append("integration/test_trio.py")
+    collect_ignore += [
+        "integration/test_asyncio.py",
+        "integration/test_asyncio_coroutine.py",
+        "integration/test_tornado.py",
+        "integration/test_trio.py",
+    ]