diff --git a/t/05-messages/11-overflow.t b/t/05-messages/11-overflow.t
new file mode 100644
index 00000000000..afcbf8f9f13
--- /dev/null
+++ b/t/05-messages/11-overflow.t
@@ -0,0 +1,23 @@
+use lib <t/packages/>;
+use Test;
+use Test::Helpers;
+
+# This file contains tests for behaviour on overflow in various routines
+
+plan 1;
+
+# RT #125820
+subtest '.roll' => {
+    plan 3;
+    
+    throws-like { <a b c d e>.roll(-9999999999999999999999999999999999999999999999999).perl },
+        Exception, :message{ .contains: <unbox native>.all }, '(1)';
+
+    throws-like { <a b c d e>.roll(-99999999999999999999999999999999999999999999999999999999999999999).perl },
+        Exception, :message{ .contains: <unbox native>.all }, '(2)';
+
+    throws-like { <a b c d e>.roll(99999999999999999999999999999999999999999999999999999999999999999).perl },
+        Exception, :message{ .contains: <unbox native>.all }, '(3)';
+}
+
+# vim: ft=perl6 expandtab sw=4