my $tests;
$tests += $_->[1] foreach @pow;
-plan tests => 1 + $bits_in_uv + $tests;
+plan tests => 2 + $bits_in_uv + $tests;
+
+# This gave positive 27 before change #20167
+is((-3)**3, -27, "(negative int) ** (odd power) is negative");
# Ought to be 32, 64, 36 or something like that.