diff --git a/src/test/perl/PostgreSQL/Test/Cluster.pm b/src/test/perl/PostgreSQL/Test/Cluster.pm
new file mode 100644
index 0000000000..1e2fb50d6d
--- /dev/null
+++ b/src/test/perl/PostgreSQL/Test/Cluster.pm
@@ -0,0 +1,16 @@
+
+# Copyright (c) 2022, PostgreSQL Global Development Group
+
+# allow use of release 15+ perl namespace in older branches
+# just 'use' the older module name.
+# See PostgresNode.pm for function implementations
+
+package PostgreSQL::Test::Cluster;
+
+use strict;
+use warnings;
+
+use PostgresNode;
+
+1;
+
diff --git a/src/test/perl/PostgreSQL/Test/Utils.pm b/src/test/perl/PostgreSQL/Test/Utils.pm
new file mode 100644
index 0000000000..bdbbd6e470
--- /dev/null
+++ b/src/test/perl/PostgreSQL/Test/Utils.pm
@@ -0,0 +1,48 @@
+# Copyright (c) 2022, PostgreSQL Global Development Group
+
+# allow use of release 15+ perl namespace in older branches
+# just 'use' the older module name.
+# We export the same names as the v15 module.
+# See TestLib.pm for alias assignment that makes this all work.
+
+package PostgreSQL::Test::Utils;
+
+use strict;
+use warnings;
+
+use Exporter 'import';
+
+use TestLib;
+
+our @EXPORT = qw(
+  generate_ascii_string
+  slurp_dir
+  slurp_file
+  append_to_file
+  check_mode_recursive
+  chmod_recursive
+  check_pg_config
+  dir_symlink
+  system_or_bail
+  system_log
+  run_log
+  run_command
+  pump_until
+
+  command_ok
+  command_fails
+  command_exit_is
+  program_help_ok
+  program_version_ok
+  program_options_handling_ok
+  command_like
+  command_like_safe
+  command_fails_like
+  command_checks_all
+
+  $windows_os
+  $is_msys2
+  $use_unix_sockets
+);
+
+1;