diff --git a/scripts/mbedtls_dev/ecp.py b/scripts/mbedtls_dev/ecp.py
index d1d23c1..b211c98 100644
--- a/scripts/mbedtls_dev/ecp.py
+++ b/scripts/mbedtls_dev/ecp.py
@@ -488,3 +488,66 @@
     def arguments(self):
         args = super().arguments()
         return  ["MBEDTLS_ECP_DP_SECP521R1"] + args
+
+
+class EcpP192K1Raw(bignum_common.ModOperationCommon,
+                   EcpTarget):
+    """Test cases for ECP P192K1 fast reduction."""
+    symbol = "-"
+    test_function = "ecp_mod_p192k1"
+    test_name = "ecp_mod_p192k1"
+    input_style = "fixed"
+    arity = 1
+
+    moduli = ["fffffffffffffffffffffffffffffffffffffffeffffee37"] # type: List[str]
+
+    input_values = [
+        "0", "1",
+
+        # Modulus - 1
+        "fffffffffffffffffffffffffffffffffffffffeffffee36",
+
+        # Modulus + 1
+        "fffffffffffffffffffffffffffffffffffffffeffffee38",
+
+        # 2^192 - 1
+        "ffffffffffffffffffffffffffffffffffffffffffffffff",
+
+        # Maximum canonical P192K1 multiplication result
+        ("fffffffffffffffffffffffffffffffffffffffdffffdc6c"
+         "0000000000000000000000000000000100002394013c7364"),
+
+        # First 8 number generated by random.getrandbits(384) - seed(2,2)
+        ("cf1822ffbc6887782b491044d5e341245c6e433715ba2bdd"
+         "177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973"),
+        ("ffed9235288bc781ae66267594c9c9500925e4749b575bd1"
+         "3653f8dd9b1f282e4067c3584ee207f8da94e3e8ab73738f"),
+        ("ef8acd128b4f2fc15f3f57ebf30b94fa82523e86feac7eb7"
+         "dc38f519b91751dacdbd47d364be8049a372db8f6e405d93"),
+        ("e8624fab5186ee32ee8d7ee9770348a05d300cb90706a045"
+         "defc044a09325626e6b58de744ab6cce80877b6f71e1f6d2"),
+        ("2d3d854e061b90303b08c6e33c7295782d6c797f8f7d9b78"
+         "2a1be9cd8697bbd0e2520e33e44c50556c71c4a66148a86f"),
+        ("fec3f6b32e8d4b8a8f54f8ceacaab39e83844b40ffa9b9f1"
+         "5c14bc4a829e07b0829a48d422fe99a22c70501e533c9135"),
+        ("97eeab64ca2ce6bc5d3fd983c34c769fe89204e2e8168561"
+         "867e5e15bc01bfce6a27e0dfcbf8754472154e76e4c11ab2"),
+        ("bd143fa9b714210c665d7435c1066932f4767f26294365b2"
+         "721dea3bf63f23d0dbe53fcafb2147df5ca495fa5a91c89b"),
+
+        # Next 2 number generated by random.getrandbits(192)
+        "47733e847d718d733ff98ff387c56473a7a83ee0761ebfd2",
+        "cbd4d3e2d4dec9ef83f0be4e80371eb97f81375eecc1cb63"
+    ]
+
+    @property
+    def arg_a(self) -> str:
+        return super().format_arg('{:x}'.format(self.int_a)).zfill(2 * self.hex_digits)
+
+    def result(self) -> List[str]:
+        result = self.int_a % self.int_n
+        return [self.format_result(result)]
+
+    @property
+    def is_valid(self) -> bool:
+        return True