diff -bu Math-BigInt-GMP-1.6004-7/t/mbimbf.t~ Math-BigInt-GMP-1.6004-7/t/mbimbf.t
--- Math-BigInt-GMP-1.6004-7/t/mbimbf.t~	2017-01-04 14:52:55.000000000 +0100
+++ Math-BigInt-GMP-1.6004-7/t/mbimbf.t	2017-03-08 10:58:04.000000000 +0100
@@ -7,7 +7,8 @@
 use warnings;
 
 use Test::More tests => 712             # tests in require'd file
-                        + 26;           # tests in this file
+                       + 26            # tests in this file
+                       - ("$^V" =~ /v5\.2[56]\..c$/ ? 12 : 0);
 
 use Math::BigInt only => 'GMP';
 use Math::BigFloat;