diff --git a/scripts/mbedtls_dev/ecp.py b/scripts/mbedtls_dev/ecp.py
index aee871831..c5ad3c8f1 100644
--- a/scripts/mbedtls_dev/ecp.py
+++ b/scripts/mbedtls_dev/ecp.py
@@ -43,6 +43,24 @@ class EcpP192R1Raw(bignum_common.ModOperationCommon,
         # Modulus - 1
         "fffffffffffffffffffffffffffffffefffffffffffffffe",
 
+        # Modulus + 1
+        "ffffffffffffffffffffffffffffffff0000000000000000",
+
+        # 2^192 - 1
+        "ffffffffffffffffffffffffffffffffffffffffffffffff",
+
+        # Maximum canonical P192 multiplication result
+        ("fffffffffffffffffffffffffffffffdfffffffffffffffc"
+         "000000000000000100000000000000040000000000000004"),
+
+        # Generate an overflow during reduction
+        ("00000000000000000000000000000001ffffffffffffffff"
+         "ffffffffffffffffffffffffffffffff0000000000000000"),
+
+        # Generate an overflow during carry reduction
+        ("ffffffffffffffff00000000000000010000000000000000"
+         "fffffffffffffffeffffffffffffffff0000000000000000"),
+
         # First 8 number generated by random.getrandbits(384) - seed(2,2)
         ("cf1822ffbc6887782b491044d5e341245c6e433715ba2bdd"
          "177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973"),