diff --git a/bigint_test.lua b/bigint_test.lua
index c3f45af..1aac32c 100644
--- a/bigint_test.lua
+++ b/bigint_test.lua
@@ -89,3 +89,4 @@ test_divmod("322", "12312321")
 
 test_op("2", "100", "^")
 test_op("5", "1024", "^")
+test_op("3", "4233", "^")