diff --git a/random-tests.php b/random-tests.php
index fcab47f..c59529f 100644
--- a/random-tests.php
+++ b/random-tests.php
@@ -11,7 +11,7 @@
 
 use Brick\Math\Internal\Calculator;
 
-(new class(100) {
+(new class(30) { // max digits
     private $gmp;
     private $bcmath;
     private $native;