diff --git a/contrib/pg_upgrade/test.sh b/contrib/pg_upgrade/test.sh
index 3be0304d16f..28130f16010 100644
--- a/contrib/pg_upgrade/test.sh
+++ b/contrib/pg_upgrade/test.sh
@@ -76,10 +76,10 @@ rm -rf "$BASE_PGDATA" "$PGDATA"
 PGDATABASE="";        unset PGDATABASE
 PGUSER="";            unset PGUSER
 PGSERVICE="";         unset PGSERVICE
-PGSSLMODE=""          unset PGSSLMODE
+PGSSLMODE="";         unset PGSSLMODE
 PGREQUIRESSL="";      unset PGREQUIRESSL
 PGCONNECT_TIMEOUT=""; unset PGCONNECT_TIMEOUT
-PGHOST=""             unset PGHOST
+PGHOST="";            unset PGHOST
 PGHOSTADDR="";        unset PGHOSTADDR
 
 logdir=$PWD/log