--- /dev/null
+require File::Spec;
+require File::Find;
+
+my $xt_dirs;
+File::Find::find(sub {
+ return if $xt_dirs->{$File::Find::dir};
+ $xt_dirs->{$File::Find::dir} = 1 if (
+ $_ =~ /\.t$/ and -f $_
+ );
+}, 'xt');
+
+my $xt_tests = join (' ', map { File::Spec->catfile($_, '*.t') } sort keys %$xt_dirs );
+
+# this will add the xt tests to the `make test` target among other things
+Meta->tests(join (' ', map { $_ || () } Meta->tests, $xt_tests ) );
+
+# inject an explicit xt test run for making a tarball (distdir is exempt)
+postamble <<"EOP";
+
+.PHONY: test_xt
+
+dist : test_xt
+
+test_xt :
+\tPERL_DL_NONLAZY=1 RELEASE_TESTING=1 \$(FULLPERLRUN) "-MExtUtils::Command::MM" "-e" "test_harness(\$(TEST_VERBOSE), 'inc', '\$(INST_LIB)', '\$(INST_ARCHLIB)')" $xt_tests
+
+EOP
+
+
+# keep the Makefile.PL eval happy
+1;