diff --git a/contrib/python3-whitelist b/contrib/python3-whitelist
--- a/contrib/python3-whitelist
+++ b/contrib/python3-whitelist
@@ -216,6 +216,7 @@
 test-narrow-update.t
 test-newbranch.t
 test-obshistory.t
+test-obsmarker-template.t
 test-obsmarkers-effectflag.t
 test-obsolete-bundle-strip.t
 test-obsolete-changeset-exchange.t