Pylint 1.8.1, and fix its new warnings

2 files changed, 2 insertions, 1 deletions

diff --git a/coverage/collector.py b/coverage/collector.py
index 658aed62..72ab32b6 100644
--- a/coverage/collector.py
+++ b/coverage/collector.py
@@ -43,6 +43,7 @@ def should_start_context(frame):
     fn_name = frame.f_code.co_name
     if fn_name.startswith("test"):
         return fn_name
+    return None
 
 
 class Collector(object):
diff --git a/coverage/pytracer.py b/coverage/pytracer.py
index 1a5fe3c4..7e70bab6 100644
--- a/coverage/pytracer.py
+++ b/coverage/pytracer.py
@@ -88,7 +88,7 @@ class PyTracer(object):
             # thread, let's deactivate ourselves now.
             #self.log("X", frame.f_code.co_filename, frame.f_lineno)
             sys.settrace(None)
-            return
+            return None
 
         if self.last_exc_back:
             if frame == self.last_exc_back: