diff --git a/tools/test_modules/m06900.pm b/tools/test_modules/m06900.pm
index 1cf48854c..59a64c86c 100644
--- a/tools/test_modules/m06900.pm
+++ b/tools/test_modules/m06900.pm
@@ -10,7 +10,7 @@ use warnings;
 
 use Digest::GOST qw (gost_hex);
 
-sub module_constraints { [[0, 32], [-1, -1], [0, 32], [-1, -1], [-1, -1]] }
+sub module_constraints { [[1, 32], [-1, -1], [1, 32], [-1, -1], [-1, -1]] }
 
 sub module_generate_hash
 {