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-rw-r--r--tst/test_listen.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/tst/test_listen.py b/tst/test_listen.py
index f35ce82..8004380 100644
--- a/tst/test_listen.py
+++ b/tst/test_listen.py
@@ -118,7 +118,7 @@ def certificates(draw):
     hostname = draw(domains())
     port = draw(ports())
     serial = draw(serials())
-    issuer = draw(ca_names()) or '\0'
+    issuer = draw(ca_names())
     return f'{not_before} {not_after} {hostname} {port} {serial} {issuer}'