diff --git a/scripts/mbedtls_dev/ecp.py b/scripts/mbedtls_dev/ecp.py
index 2dae703..5f0efcf 100644
--- a/scripts/mbedtls_dev/ecp.py
+++ b/scripts/mbedtls_dev/ecp.py
@@ -518,6 +518,10 @@
         ("fffffffffffffffffffffffffffffffffffffffdffffdc6c"
          "0000000000000000000000000000000100002394013c7364"),
 
+        # Test case for overflow during addition
+        ("00000007ffff71b809e27dd832cfd5e04d9d2dbb9f8da217"
+         "0000000000000000000000000000000000000000520834f0"),
+
         # First 8 number generated by random.getrandbits(384) - seed(2,2)
         ("cf1822ffbc6887782b491044d5e341245c6e433715ba2bdd"
          "177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973"),
@@ -582,6 +586,10 @@
         ("fffffffffffffffffffffffffffffffffffffffffffffffdffffcad8"
          "00000000000000000000000000000000000000010000352802c26590"),
 
+        # Test case for overflow during addition
+        ("0000007ffff2b68161180fd8cd92e1a109be158a19a99b1809db8032"
+         "0000000000000000000000000000000000000000000000000bf04f49"),
+
         # First 8 number generated by random.getrandbits(448) - seed(2,2)
         ("da94e3e8ab73738fcf1822ffbc6887782b491044d5e341245c6e4337"
          "15ba2bdd177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973"),
@@ -647,6 +655,10 @@
         ("fffffffffffffffffffffffffffffffffffffffffffffffffffffffdfffff85c0"
          "00000000000000000000000000000000000000000000001000007a4000e9844"),
 
+        # Test case for overflow during addition
+        ("0000fffffc2f000e90a0c86a0a63234e5ba641f43a7e4aecc4040e67ec850562"
+         "00000000000000000000000000000000000000000000000000000000585674fd"),
+
         # First 8 number generated by random.getrandbits(512) - seed(2,2)
         ("4067c3584ee207f8da94e3e8ab73738fcf1822ffbc6887782b491044d5e34124"
          "5c6e433715ba2bdd177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973"),