1 files changed, 1 insertions, 1 deletions
diff --git a/coverage/misc.py b/coverage/misc.py
index c88d4ec..4b1dccb 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -87,7 +87,7 @@ def bool_or_none(b):
 def join_regex(regexes):
     """Combine a list of regexes into one that matches any of them."""
     if len(regexes) > 1:
-        return "|".join("(%s)" % r for r in regexes)
+        return "|".join("(?:%s)" % r for r in regexes)
     elif regexes:
         return regexes[0]
     else: