Fixed up some flake8 errors from the latest version
diff --git a/tests/memdbg.py b/tests/memdbg.py
index 0deeb9e..e927332 100644
--- a/tests/memdbg.py
+++ b/tests/memdbg.py
@@ -1,11 +1,16 @@
import sys
-sys.modules['ssl'] = None
-sys.modules['_hashlib'] = None
-
import traceback
from cffi import api as _api
+
+
+assert sys.modules.get('ssl') is None
+assert sys.modules.get('_hashlib') is None
+sys.modules['ssl'] = None
+sys.modules['_hashlib'] = None
+
+
_ffi = _api.FFI()
_ffi.cdef(
"""
diff --git a/tests/runtests.py b/tests/runtests.py
deleted file mode 100644
index aca1d61..0000000
--- a/tests/runtests.py
+++ /dev/null
@@ -1,17 +0,0 @@
-"""
-This is a legacy file that no-one currently knows how to use.
-
-Please run your tests using ``py.test tests`` or ``tox``.
-"""
-
-import sys
-sys.modules['ssl'] = None
-sys.modules['_hashlib'] = None
-
-try:
- from . import memdbg # noqa
-except Exception as e:
- pass
-
-from twisted.scripts.trial import run
-run()