diff --git a/test/default/core_ristretto255.c b/test/default/core_ristretto255.c
index bd67f71d..2367f8a2 100644
--- a/test/default/core_ristretto255.c
+++ b/test/default/core_ristretto255.c
@@ -10,6 +10,7 @@ tv1(void)
         "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
         "f3ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
         "edffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
+        "0100000000000000000000000000000000000000000000000000000000000080",
 
         /* Negative field elements */
         "0100000000000000000000000000000000000000000000000000000000000000",