diff --git a/src/test/regress/pg_regress_multi.pl b/src/test/regress/pg_regress_multi.pl
index 32db65a5c23..599feddc430 100755
--- a/src/test/regress/pg_regress_multi.pl
+++ b/src/test/regress/pg_regress_multi.pl
@@ -293,10 +293,12 @@ sub generate_hba
 
     open(my $fh, ">", catfile($TMP_CHECKDIR, $nodename, "data", "pg_hba.conf"))
         or die "could not open pg_hba.conf";
-    print $fh "host all         alice,bob localhost      md5\n";
+    print $fh "host all         alice,bob 127.0.0.1/32 md5\n";
+    print $fh "host all         alice,bob ::1/128      md5\n";
     print $fh "host all         all       127.0.0.1/32 trust\n";
     print $fh "host all         all       ::1/128      trust\n";
-    print $fh "host replication postgres  localhost    trust\n";
+    print $fh "host replication postgres  127.0.0.1/32 trust\n";
+    print $fh "host replication postgres  ::1/128      trust\n";
     close $fh;
 }