diff --git a/roles/copr/backend/files/provision/files/mock/site-defaults.cfg b/roles/copr/backend/files/provision/files/mock/site-defaults.cfg
index 56b4ac431c..364d78cc0f 100644
--- a/roles/copr/backend/files/provision/files/mock/site-defaults.cfg
+++ b/roles/copr/backend/files/provision/files/mock/site-defaults.cfg
@@ -26,6 +26,7 @@ config_opts['plugin_conf']['chroot_scan_enable'] = True
 config_opts['plugin_conf']['chroot_scan_opts'] = {
     'regexes': [ "dnf.*log$" ],
     'only_failed': False,
+    'write_tar': True,
 }
 
 # https://bugzilla.redhat.com/show_bug.cgi?id=1690971