diff --git a/distgit_bugzilla_sync/script.py b/distgit_bugzilla_sync/script.py
index 2915bc4..83cd92b 100644
--- a/distgit_bugzilla_sync/script.py
+++ b/distgit_bugzilla_sync/script.py
@@ -501,7 +501,6 @@ class DistgitBugzillaSync:
     _namespace_to_product = None
     _product_to_branch_regex = None
     _branch_regex_to_product = None
-    errors = collections.defaultdict(list)
 
     def send_email(self, from_address, to_address, subject, message, cc_address=None):
         '''Send an email if there's an error.
@@ -849,7 +848,7 @@ class DistgitBugzillaSync:
         self.env["print-no-change"] = self.args.print_no_change
 
         # Non-fatal errors to alert people about
-        errors = []
+        self.errors = collections.defaultdict(list)
 
         self.session = retry_session()