test_requires 'Test::More' => 0.88;
test_requires 'Test::Exception' => 0.27;
-test_requires 'Test::Output' => 0.16;
+# test_requires 'Test::Output' => 0.16; # too many dependencies!
+
+include 'Test::Exception'; # work around 0.27_0x (its use of diehook might be wrong)
recommends 'MRO::Compat' if $] < 5.010;