# From a Build.PL
requires => {
  Scalar::Util    => 0,
  Test::Exception => 0,
  Test::More      => 0,
}

##</code><code>##

requires => {
  Scalar::Util    => 1.17,
  Test::Exception => 0.21,
  Test::More      => 0.60,
}

##</code><code>##

requires => {
  Scalar::Util    => 1.14,
  Test::Exception => 0.20,
  Test::More      => 0.54,
}

##</code><code>##

requires => {
  Scalar::Util    => 1.09, # first appearance of refaddr()
  Test::Exception => 0.21, # 0.20 doesn't build well with CPANPLUS
  Test::More      => 0.48, # thread safe
}