Oops misread my own test case!!! Thanks adrianh

No you can't Yes you can have test.pl and t/test.t and get both run AFAIK. The test dir/file is specified in the Makefile when you do perl Makefile.PL. If there is a t/ dir then that is what is used. If there is not a t/dir then test.pl is used.

[root@devel3 test]# perl -MFile::Find -e 'File::Find::find( sub{print 
+$File::Find::name, $/, `cat $_`, $/,$/}, "." )';
cat: .: Is a directory
.


./test.pl
#!/usr/bin/perl
use Test;
BEGIN{plan tests => 1}
ok(1);


./Makefile.PL
use ExtUtils::MakeMaker;
WriteMakefile(
    'NAME'              => 'T',
);


./T.pm
package T;

1;


cat: t: Is a directory
./t


./t/test_t.t
#!/usr/bin/perl
use Test;
BEGIN{plan tests => 1}
ok(1);


[root@devel3 test]# perl Makefile.PL
Writing Makefile for T
[root@devel3 test]# make
cp T.pm blib/lib/T.pm
[root@devel3 test]# make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_h
+arness(0, 'blib/lib', 'blib/arch')" t/*.t
t/test_t....ok
All tests successful.
Files=1, Tests=1,  0 wallclock secs ( 0.02 cusr +  0.00 csys =  0.02 C
+PU)
PERL_DL_NONLAZY=1 /usr/bin/perl "-Iblib/lib" "-Iblib/arch" test.pl
1..1
ok 1

[root@devel3 test]# mv t t.ignore

[root@devel3 test]# perl Makefile.PL
Writing Makefile for T
[root@devel3 test]# make
[root@devel3 test]# make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-Iblib/lib" "-Iblib/arch" test.pl
1..1
ok 1
[root@devel3 test]#

[root@devel3 test]# rm -f test.pl
[root@devel3 test]# perl Makefile.PL
Writing Makefile for T
[root@devel3 test]# make
[root@devel3 test]# make test
No tests defined for T extension.
[root@devel3 test]#

[root@devel3 test]# mv t.ignore/ t
[root@devel3 test]# perl Makefile.PL
Writing Makefile for T
[root@devel3 test]# make
[root@devel3 test]# make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_h
+arness(0, 'blib/lib', 'blib/arch')" t/*.t
t/test_t....ok
All tests successful.
Files=1, Tests=1,  0 wallclock secs ( 0.01 cusr +  0.01 csys =  0.02 C
+PU)
[root@devel3 test]#
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