diff --git a/tools/test_modules/m18100.pm b/tools/test_modules/m18100.pm
index 516df174f..94ab8832f 100644
--- a/tools/test_modules/m18100.pm
+++ b/tools/test_modules/m18100.pm
@@ -11,7 +11,7 @@ use warnings;
 use Digest::SHA  qw (sha1);
 use Digest::HMAC qw (hmac_hex);
 
-sub module_constraints { [[0, 255], [0, 55], [0, 255], [0, 55], [-1, -1]] }
+sub module_constraints { [[0, 255], [8, 12], [0, 255], [8, 12], [-1, -1]] }
 
 sub module_generate_hash
 {