--- /dev/null
+#!/usr/bin/perl -w
+
+# Test the idiom of running another test file as a subtest.
+
+use strict;
+use Test::More;
+
+pass("First");
+
+my $file = "t/subtest/for_do_t.test";
+ok -e $file, "subtest test file exists";
+
+subtest $file => sub { do $file };
+
+pass("Last");
+
+done_testing(4);