Yes. My answer is equivalent to -I, but is internal to the script. Also, you can put flags on the #! line at the begining of your script:

#!/usr/bin/perl -w -I.
use strict;
use ModuleToTest;
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is the same as

#!/usr/bin/perl -w
use strict;
use lib '.';
use ModuleToTest;
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I happen to like the use_lib method better, as it is more readilly apparent what you are doing (but still might warrant a comment.)