diff --git a/src/bin/scripts/t/100_vacuumdb.pl b/src/bin/scripts/t/100_vacuumdb.pl
index d6555f5fef4..ac160ba8374 100644
--- a/src/bin/scripts/t/100_vacuumdb.pl
+++ b/src/bin/scripts/t/100_vacuumdb.pl
@@ -29,4 +29,4 @@ issues_sql_like(
 issues_sql_like(
 	[ 'vacuumdb', '-Z', 'postgres' ],
 	qr/statement: ANALYZE;/,
-	'vacuumdb -z');
+	'vacuumdb -Z');