--- /dev/null
+#!/usr/bin/perl
+
+# Copyright 2020 Koha Development Team
+#
+# This file is part of Koha.
+#
+# Koha is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Koha is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Koha; if not, see <http://www.gnu.org/licenses>.
+
+use Modern::Perl;
+use Test::More;
+
+use File::Spec;
+use File::Slurp qw( read_file );
+use Data::Dumper;
+
+my $curdir = File::Spec->curdir();
+my @dirs = `find $curdir -maxdepth 1 -type d`;
+my $makefile = read_file("$curdir/Makefile.PL");
+my @missing;
+for my $d ( sort @dirs ) {
+ chomp $d;
+ next if $d eq './Koha';
+ next if $d eq './C4';
+ next if $d eq './koha-tmpl';
+ next if $d eq './etc';
+ next if $d eq './debian';
+ next if $makefile =~ m|'$d'|gxms;
+ push @missing, $d;
+}
+
+is( scalar @missing, 0, 'All directories must be listed in Makefile.PL' ) or diag Dumper \@missing;