--- a/eric7/DebugClients/Python/coverage/misc.py	Fri Aug 20 19:56:17 2021 +0200
+++ b/eric7/DebugClients/Python/coverage/misc.py	Sat Aug 21 14:21:44 2021 +0200
@@ -63,7 +63,7 @@
     def new_contract(*args, **kwargs):
         """A proxy for contracts.new_contract that doesn't mind happening twice."""
         try:
-            return raw_new_contract(*args, **kwargs)
+            raw_new_contract(*args, **kwargs)
         except ValueError:
             # During meta-coverage, this module is imported twice, and
             # PyContracts doesn't like redefining contracts. It's OK.
@@ -77,7 +77,7 @@
     def one_of(argnames):
         """Ensure that only one of the argnames is non-None."""
         def _decorator(func):
-            argnameset = set(name.strip() for name in argnames.split(","))
+            argnameset = {name.strip() for name in argnames.split(",")}
             def _wrapper(*args, **kwargs):
                 vals = [kwargs.get(name) for name in argnameset]
                 assert sum(val is not None for val in vals) == 1