diff --git a/tests/suites/test_suite_ecp.data b/tests/suites/test_suite_ecp.data
index 5e5f072..d08ce0f 100644
--- a/tests/suites/test_suite_ecp.data
+++ b/tests/suites/test_suite_ecp.data
@@ -1234,3 +1234,289 @@
 ecp_mul_inv #48 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE448)
 depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
 ecp_mod_mul_inv:"0000000000000003fffffffffffffffffffffffffffffffffffffffffffffffffffffff01243a939d867d7e0a75a8568d4d66de88f3ecc1ad37f91a8f9d7d70":MBEDTLS_ECP_DP_CURVE448:MBEDTLS_ECP_MOD_SCALAR
+
+# The following data was generated using python's standard random library,
+# initialised with seed(2,2) and random.getrandbits(curve bits). Curve bits are 192,256,384,520.
+# They must be less than the named curves' modulus. mbedtls_mpi_mod_residue_setup()
+# can be used to check whether they satisfy the requirements.
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #1.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192R1)
+depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+ecp_mod_add_sub:"ffffffffffffffffffffffff99def836146bc9b1b4d22830":"ffffffffffffffffffffffff99def836146bc9b1b4d2282f":MBEDTLS_ECP_DP_SECP192R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #1 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192R1)
+depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+ecp_mod_add_sub:"177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973":"cf1822ffbc6887782b491044d5e341245c6e433715ba2bdd":MBEDTLS_ECP_DP_SECP192R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #2 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192R1)
+depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+ecp_mod_add_sub:"3653f8dd9b1f282e4067c3584ee207f8da94e3e8ab73738f":"ffed9235288bc781ae66267594c9c9500925e4749b575bd1":MBEDTLS_ECP_DP_SECP192R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #3 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192R1)
+depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+ecp_mod_add_sub:"dc38f519b91751dacdbd47d364be8049a372db8f6e405d93":"ef8acd128b4f2fc15f3f57ebf30b94fa82523e86feac7eb7":MBEDTLS_ECP_DP_SECP192R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #4.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224R1)
+depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
+ecp_mod_add_sub:"ffffffffffffffffffffffffffff16a2e0b8f03e13dd29455c5c2a3c":"ffffffffffffffffffffffffffff16a2e0b8f03e13dd29455c5c2a3b":MBEDTLS_ECP_DP_SECP224R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #4 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224R1)
+depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
+ecp_mod_add_sub:"706a045defc044a09325626e6b58de744ab6cce80877b6f71e1f6d2":"6c71c4a66148a86fe8624fab5186ee32ee8d7ee9770348a05d300cb9":MBEDTLS_ECP_DP_SECP224R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #5 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224R1)
+depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
+ecp_mod_add_sub:"3c7295782d6c797f8f7d9b782a1be9cd8697bbd0e2520e33e44c5055":"829a48d422fe99a22c70501e533c91352d3d854e061b90303b08c6e3":MBEDTLS_ECP_DP_SECP224R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #6 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224R1)
+depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
+ecp_mod_add_sub:"2e8d4b8a8f54f8ceacaab39e83844b40ffa9b9f15c14bc4a829e07b0":"867e5e15bc01bfce6a27e0dfcbf8754472154e76e4c11ab2fec3f6b3":MBEDTLS_ECP_DP_SECP224R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #7.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256R1)
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecp_mod_add_sub:"ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632550":"ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc63254f":MBEDTLS_ECP_DP_SECP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #7 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256R1)
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecp_mod_add_sub:"5ca495fa5a91c89b97eeab64ca2ce6bc5d3fd983c34c769fe89204e2e8168561":"665d7435c1066932f4767f26294365b2721dea3bf63f23d0dbe53fcafb2147df":MBEDTLS_ECP_DP_SECP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #8 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256R1)
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecp_mod_add_sub:"47733e847d718d733ff98ff387c56473a7a83ee0761ebfd2bd143fa9b714210c":"a9643a295a9ac6decbd4d3e2d4dec9ef83f0be4e80371eb97f81375eecc1cb63":MBEDTLS_ECP_DP_SECP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #9 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256R1)
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecp_mod_add_sub:"b9d39cca91551e8259cc60b17604e4b4e73695c3e652c71a74667bffe202849d":"f0caeef038c89b38a8acb5137c9260dc74e088a9b9492f258ebdbfe3eb9ac688":MBEDTLS_ECP_DP_SECP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #10.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP384R1)
+depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
+ecp_mod_add_sub:"ffffffffffffffffffffffffffffffffffffffffffffffffc7634d81f4372ddf581a0db248b0a77aecec196accc52972":"ffffffffffffffffffffffffffffffffffffffffffffffffc7634d81f4372ddf581a0db248b0a77aecec196accc52971":MBEDTLS_ECP_DP_SECP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #10 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP384R1)
+depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
+ecp_mod_add_sub:"7ad1f45ae9500ec9c5e2486c44a4a8f69dc8db48e86ec9c6e06f291b2a838af8d5c44a4eb3172062d08f1bb2531d6460":"9da59b74a6c3181c81e220df848b1df78feb994a81167346d4c0dca8b4c9e755cc9c3adcf515a8234da4daeb4f3f8777":MBEDTLS_ECP_DP_SECP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #11 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP384R1)
+depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
+ecp_mod_add_sub:"e1cf4f589f8e4ce0af29d115ef24bd625dd961e6830b54fa7d28f93435339774bb1e386c4fd5079e681b8f5896838b76":"1b2d19a2beaa14a7ff3fe32a30ffc4eed0a7bd04e85bfcdd0227eeb7b9d7d01f5769da05d205bbfcc8c69069134bccd3":MBEDTLS_ECP_DP_SECP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #12 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP384R1)
+depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
+ecp_mod_add_sub:"c11e60de1b343f52ea748db9e020307aaeb6db2c3a038a709779ac1f45e9dd320c855fdfa7251af0930cdbd30f0ad2a8":"e5e138e26c4454b90f756132e16dce72f18e859835e1f291d322a7353ead4efe440e2b4fda9c025a22f1a83185b98f5f":MBEDTLS_ECP_DP_SECP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #13.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP521R1)
+depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+ecp_mod_add_sub:"01fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffa51868783bf2f966b7fcc0148f709a5d03bb5c9b8899c47aebb6fb71e91386408":"01fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffa51868783bf2f966b7fcc0148f709a5d03bb5c9b8899c47aebb6fb71e91386407":MBEDTLS_ECP_DP_SECP521R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #13 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP521R1)
+depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+ecp_mod_add_sub:"1ba0a76c196067cfdcb11457d9cf45e2fa01d7f4275153924800600571fac3a5b263fdf57cd2c0064975c3747465cc36c270e8a35b10828d569c268a20eb78ac332":"1cb0b0c995e96e6bc4d62b47204007ee4fab105d83e85e951862f0981aebc1b00d92838e766ef9b6bf2d037fe2e20b6a8464174e75a5f834da70569c018eb2b5693":MBEDTLS_ECP_DP_SECP521R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #14 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP521R1)
+depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+ecp_mod_add_sub:"177d1f71575653a45c49390aa51cf5192bbf67da14be11d56ba0b4a2969d8055a9f03f2d71581d8e830112ff0f0948eccaf8877acf26c377c13f719726fd70bdda":"1f5790813e32748dd1db4917fc09f20dbb0dcc93f0e66dfe717c17313394391b6e2e6eacb0f0bb7be72bd6d25009aeb7fa0c4169b148d2f527e72daf0a54ef25c07":MBEDTLS_ECP_DP_SECP521R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #15 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP521R1)
+depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+ecp_mod_add_sub:"164c7f3860895bfa81384ae65e920a63ac1f2b64df6dff07870c9d531ae72a47403063238da1a1fe3f9d6a179fa50f96cd4aff9261aa92c0e6f17ec940639bc2ccd":"1f58ed5d1b7b310b730049dd332a73fa0b26b75196cf87eb8a09b27ec714307c68c425424a1574f1eedf5b0f16cdfdb839424d201e653f53d6883ca1c107ca6e706":MBEDTLS_ECP_DP_SECP521R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #16.0 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"a9fb57dba1eea9bc3e660a909d838d726e3bf623d52620282013481d1f6e5376":"a9fb57dba1eea9bc3e660a909d838d726e3bf623d52620282013481d1f6e5375":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_COORDINATE
+
+# The following data was generated using python's standard random library,
+# initialised with seed(3,2) and random.getrandbits(curve bits). Curve bits are 256,384,512.
+ecp_add_sub #16 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"795b929e9a9a80fdea7b5bf55eb561a4216363698b529b4a97b750923ceb3ffd":"781f9c58d6645fa9e8a8529f035efa259b08923d10c67fd994b2b8fda02f34a6":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #17 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"8a7d43b578633074b7970386fee29476311624273bfd1d338d0038ec42650644":"3b5f3d86268ecc45dc6bf1e1a399f82a65aa9c8279f248b08cb4a0d7d6225675":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #18 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"3e0a813bdc2ae9963d2e49085ef3430ed038db4de38378426d0b944a2863a7f":"af438d297524d6af51e8722c21b609228ce6f2410645d51c6f8da3eabe19f58":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_COORDINATE
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #19.0 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"a9fb57dba1eea9bc3e660a909d838d718c397aa3b561a6f7901e0e82974856a6":"a9fb57dba1eea9bc3e660a909d838d718c397aa3b561a6f7901e0e82974856a5":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #19 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"984181177906159644f9794cdd933160d2d5844307f062cec7b317d94d1fe09f":"6d4b9adbebcd1f5ec9c18070b6d13089633a50eee0f9e038eb8f624fb804d820":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #20 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"2257989fef829c88f6ced90a71d2af7293b05a04cd085b71ba6676b3651c5253":"420b0ebe378c74dc7eb0adf422cedafb092fdddf18f2c41c5d92b243e0fd67dd":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #21 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP256R1)
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_mod_add_sub:"6bd0638b4d100d8fdaf0105ba06c05a1c76abf436fa84dcaac0ae4e2f729b4c8":"6856e45b95c76ab488bafad959d5450592f3277b62c82185d55ec1a581daad10":MBEDTLS_ECP_DP_BP256R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #22.0 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"8cb91e82a3386d280f5d6f7e50e641df152f7109ed5456b412b1da197fb71123acd3a729901d1a71874700133107ec52":"8cb91e82a3386d280f5d6f7e50e641df152f7109ed5456b412b1da197fb71123acd3a729901d1a71874700133107ec51":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #22 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"4a5792b26aba54efa25994fc58aaac8176f7f138456bb11bd997c6f7cb3a88f684b5b4de4abcc4e46bd881fd21334eb0":"454608a5737b6ed79182c3c8e288b16437d02410a675a109bdf84ab55632a44614777e962b56363cf5efd434db045aae":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #23 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"439e7fa9987aa6bdd805f5d25e80dfffc2134f15500b2f292f6c48f65d2c29382d6b76db51ed2f1599f8eee797b9580f":"21a4cadebc344f4baf091db491bae46af8abffd606e44edfd0247e4cc5b3b5d31ad8df8e608d9499c98c9e514ce74654":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #24 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"7d500f7cbcefd0a747679714b4fab1019bde81635a427c37ead6b3cbade562bc5a58b185775c303c551b7f9da0996d52":"4c736db374d0df35a0c2995f40498cb35e819615f69b31ce0570ceeead0faadaf47076520f81f60c96e1689405adc011":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_COORDINATE
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #25.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"8cb91e82a3386d280f5d6f7e50e641df152f7109ed5456b31f166e6cac0425a7cf3ab6af6b7fc3103b883202e9046564":"8cb91e82a3386d280f5d6f7e50e641df152f7109ed5456b31f166e6cac0425a7cf3ab6af6b7fc3103b883202e9046563":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #25 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"1aa4b64091b1078e926baeafe79a27e68ab12c32f6f22f41538e504edc52bdcab2d87d5e29c0e596b2109307abd8952c":"846008638daf051b79e4444ed6897d8fc5ab8f2f33dc30a8f1233c76f31b6928298956cfca65f8e9f66ad57e1464134":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #26 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"7b6471e2103ef3c21fdaf62548f2f8ed445fad2a92d3043afcf249f3d4e441c3a20ab57c360c4979a7cf94d7b6bcb64f":"897897da86640cb0051490eaa9b38f203d3221cc4cc576f280d0dfba2bfc7ffd1eeda989becbde017b25f34a035d7017":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #27 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP384R1)
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_mod_add_sub:"526ef7026988f4fe5a8181b691406be110d7c25ccf3d0b35815a3d516a91f397bc73a83fd63ed5ba385ac4bda9bf98c":"8a7db67fdc960f12f8d45cb940a230e6201a95cc5762e3571d140ed89cb6c63de9bfec51f06516210da1920569eb8cb4":MBEDTLS_ECP_DP_BP384R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #28.0 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"aadd9db8dbe9c48b3fd4e6ae33c9fc07cb308db3b3c9d20ed6639cca703308717d4d9b009bc66842aecda12ae6a380e62881ff2f2d82c68528aa6056583a48f2":"aadd9db8dbe9c48b3fd4e6ae33c9fc07cb308db3b3c9d20ed6639cca703308717d4d9b009bc66842aecda12ae6a380e62881ff2f2d82c68528aa6056583a48f1":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #28 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"46150f34caab02c83d4d071b2bda77121e84949cd11a8404e33c37f188ddf9181f49e090328475a738868e9b5a124b1d0fb5d240c846756acfc1d5507a299d74":"4ca44e40943e5a2248d4a701f3d13a7bb243f13dd61005357b5f2ea9ac6cc64e1d76f9d1d80caa4d068508d51f0c6f07da305f2cd76ee016576b7da1060344bf":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #29 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"3f8de0e1457a46a7c1a9425a0cc8557466789723dcd06050922631c6a0ec66f37ccce34401ebd454ebb679b4d2d0d09720e469aace595c72e3bf018debf8e3d9":"a2fd39d9615906a78a943011c859e78da6782c0b9abc3e5b75f828935f8eec2c0aff87582db5db0591157d5f1474683acb984da361574803b9191d5cb74e9504":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_COORDINATE
+
+ecp_add_sub #30 MBEDTLS_ECP_MOD_COORDINATE(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"125fdb0f50884d442833e1d550de93987d7015fc808aefcf83f18d61160c7c39b674c4f4dabd2a4c08736a21f985732a7b99a1261183c1860cc1e0331fe78154":"6b153e7ab1b20f01f34624556ba6cc6d50a078d8b3effcadc29237ff7f03ca9ea0a0304d5f56ed310d95a7016e7ceb10e2f416a79f781c980b1ed724cd18e1a9":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_COORDINATE
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #31.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"aadd9db8dbe9c48b3fd4e6ae33c9fc07cb308db3b3c9d20ed6639cca70330870553e5c414ca92619418661197fac10471db1d381085ddaddb58796829ca90068":"aadd9db8dbe9c48b3fd4e6ae33c9fc07cb308db3b3c9d20ed6639cca70330870553e5c414ca92619418661197fac10471db1d381085ddaddb58796829ca90067":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #31 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"8da65a44ef3f7a401993edb1bfbc2a588df13f021b538e133d019261b7149706876cfe7c82e63e71904a896fc4758a8dff09f0150948f14b16baa014cc7ab32f":"731323ee13201b6215fa8a36d04d65c3974f6606cc57efacd9a68b4125321dc9703d20db1f69af34524ab0a892ca38f37f961cd3ebdc77a0496be3975f99ac4":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #32 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"3c3a447d80144a61601545c415508f3cf76060ee6b104fc58e7fdffb59ac3e68f052e38f658a2d349975c9765e129a3740bdcb7464cb7c6cf14fc8f2c0e836c4":"2331df8142351e6ec69ae2d6308b24cbe3e255b43df9ba79411171b4da97fa8037a5ae35f56e539311bb4e07ace3ca83c6ff46a4b7ba6c95a5f3b3fa3c1a7547":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #33 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_BP512R1)
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_mod_add_sub:"71bf2f08e9f7f9da70376bad2555e5ee6d966bcd5a91d4c949cc37677d2519b34ac7eb999581b2eb394c3b17ac666bfb292c157fdc0754a6b1d5f0224c3a235":"174907806c5d14842eea9771503c14af0b869300dd771fce2b72143f41483337ef0bfa78e656abc109691290dbcceb43acd62c6ab46977d09f355e742feb67af":MBEDTLS_ECP_DP_BP512R1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #34.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE25519)
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+ecp_mod_add_sub:"1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ec":"1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3eb":MBEDTLS_ECP_DP_CURVE25519:MBEDTLS_ECP_MOD_SCALAR
+
+# The following data was generated using python's standard random library,
+# initialised with seed(4,2) and random.getrandbits(curve bits). Curve bits are 128,254,192,256,448.
+ecp_add_sub #34 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE25519)
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+ecp_mod_add_sub:"01710cf527ac435a7a97c643656412a9b8a1abcd1a6916c74da4f9fc3c6da5d7":"0fd72445ccea71ff4a14876aeaff1a098ca5996666ceab360512bd1311072231":MBEDTLS_ECP_DP_CURVE25519:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #35 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE25519)
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+ecp_mod_add_sub:"10000000000000000000000000000000110a8010ce80c4b0a4042bb3d4341aad":"1000000000000000000000000000000010a8c61e3184ff27459142deccea2645":MBEDTLS_ECP_DP_CURVE25519:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #36 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE25519)
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+ecp_mod_add_sub:"0c79d67946d4ac7a5c3902b38963dc6e8534f45738d048ec0f1099c6c3e1b258":"0690526ed6f0b09f165c8ce36e2f24b43000de01b2ed40ed3addccb2c33be0a":MBEDTLS_ECP_DP_CURVE25519:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #37.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192K1)
+depends_on:MBEDTLS_ECP_DP_SECP192K1_ENABLED
+ecp_mod_add_sub:"fffffffffffffffffffffffe26f2fc170f69466a74defd8c":"fffffffffffffffffffffffe26f2fc170f69466a74defd8b":MBEDTLS_ECP_DP_SECP192K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #37 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192K1)
+depends_on:MBEDTLS_ECP_DP_SECP192K1_ENABLED
+ecp_mod_add_sub:"f5ff0c03bb5d7385de08caa1a08179104a25e4664f5253a0":"f1cfd99216df648647adec26793d0e453f5082492d83a823":MBEDTLS_ECP_DP_SECP192K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #38 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192K1)
+depends_on:MBEDTLS_ECP_DP_SECP192K1_ENABLED
+ecp_mod_add_sub:"d8441b5616332aca5f552773e14b0190d93936e1daca3c06":"d7288ff68c320f89f1347e0cdd905ecfd160c5d0ef412ed6":MBEDTLS_ECP_DP_SECP192K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #39 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP192K1)
+depends_on:MBEDTLS_ECP_DP_SECP192K1_ENABLED
+ecp_mod_add_sub:"3fb62d2c81862fc9634f806fabf4a07c566002249b191bf4":"b474c7e89286a1754abcb06ae8abb93f01d89a024cdce7a6":MBEDTLS_ECP_DP_SECP192K1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #40.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224K1)
+depends_on:MBEDTLS_ECP_DP_SECP224K1_ENABLED
+ecp_mod_add_sub:"10000000000000000000000000001dce8d2ec6184caf0a971769fb1f6":"10000000000000000000000000001dce8d2ec6184caf0a971769fb1f5":MBEDTLS_ECP_DP_SECP224K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #40 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224K1)
+depends_on:MBEDTLS_ECP_DP_SECP224K1_ENABLED
+ecp_mod_add_sub:"069f85e3131f3b9238224b122c3e4a892d9196ada4fcfa583e1df8af9":"0a5e333cb88dcf94384d4cd1f47ca7883ff5a52f1a05885ac7671863c":MBEDTLS_ECP_DP_SECP224K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #41 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224K1)
+depends_on:MBEDTLS_ECP_DP_SECP224K1_ENABLED
+ecp_mod_add_sub:"03bb4a570294c4ea3738d243a6e58d5ca49c7b59b995253fd6c79a3de":"032111ac1ac7cc4a4ff4dab102522d53857c49391b36cc9aa78a330a1":MBEDTLS_ECP_DP_SECP224K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #42 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224K1)
+depends_on:MBEDTLS_ECP_DP_SECP224K1_ENABLED
+ecp_mod_add_sub:"00bdbc23a14c15c910b11ad28cc21ce88d0060cc54278c2614e1bcb38":"070ef55b1a1f65507a2909cb633e238b4e9dd38b869ace91311021c9e":MBEDTLS_ECP_DP_SECP224K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #42.1 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP224K1)
+depends_on:MBEDTLS_ECP_DP_SECP224K1_ENABLED
+ecp_mod_add_sub:"100000000000000000000000000006f985b17b9662f0733c846bbe9e8":"10000000000000000000000000000a26a52175b7a96b98b5fbf37a2be":MBEDTLS_ECP_DP_SECP224K1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #43.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256K1)
+depends_on:MBEDTLS_ECP_DP_SECP256K1_ENABLED
+ecp_mod_add_sub:"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140":"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd036413f":MBEDTLS_ECP_DP_SECP256K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #43 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256K1)
+depends_on:MBEDTLS_ECP_DP_SECP256K1_ENABLED
+ecp_mod_add_sub:"5b69dc230af5ac870692b534758240df4a7a03052d733dcdef40af2e54c0ce68":"acdac615bc20f6264922b9ccf469aef8f6e7d078e55b85dd1525f363b281b888":MBEDTLS_ECP_DP_SECP256K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #44 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256K1)
+depends_on:MBEDTLS_ECP_DP_SECP256K1_ENABLED
+ecp_mod_add_sub:"b54a23020fc5b043d6e4a51519d9c9cc52d32377e78131c132decd6b8efbc170":"272515cdf74c381652595daf49fbac3652a3b18104a7f00753be4721f5b9e1f5":MBEDTLS_ECP_DP_SECP256K1:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #45 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_SECP256K1)
+depends_on:MBEDTLS_ECP_DP_SECP256K1_ENABLED
+ecp_mod_add_sub:"1f44ebd13cc75f3edcb285f89d8cf4d4950b16ffc3e1ac3b4708d9893a973000":"ae17584a9ed9c621de97faf0f17ca82cdc82f2526911c9dda6e46653c676176a":MBEDTLS_ECP_DP_SECP256K1:MBEDTLS_ECP_MOD_SCALAR
+
+# Use the test data "modulus - 1" and "modulus - 2" to ensure the sum overflow case be tested.
+ecp_add_sub #46.0 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE448)
+depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
+ecp_mod_add_sub:"00000000000000003fffffffffffffffffffffffffffffffffffffffffffffffffffffff7cca23e9c44edb49aed63690216cc2728dc58f552378c292ab5844f2":"00000000000000003fffffffffffffffffffffffffffffffffffffffffffffffffffffff7cca23e9c44edb49aed63690216cc2728dc58f552378c292ab5844f1":MBEDTLS_ECP_DP_CURVE448:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #46 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE448)
+depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
+ecp_mod_add_sub:"0000000000000003f28adf9f6396ae3994b971761b2ceba40031ad622ed93874ac034cf71b34e47e4e2aafd310096249e2387a54b1cef3913e7d611d163b764":"0000000000000003f924aec4a53583bff4788955cdb7f4ccde9d231c8a38e7b5d7d255f2b68beef746ccfcd0b77d43a5d02db430267ce8c92b607d554d08ce6":MBEDTLS_ECP_DP_CURVE448:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #47 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE448)
+depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
+ecp_mod_add_sub:"0000000000000003f9874f82b2df98dbcb3fd500e2637300fecf10e0f30e0051d1615ad353a09cfeaa1b2956c8826ec350d775dfb53e13d7077b81d18dbb0c1":"0000000000000003fd5b8c21f4d4cc5091b5ffbff651b9052496e1e3fc24ec0952989c17d9c649a8bd5bb710a77ec0c9b44baf5264ed787f87a7976ad448abd":MBEDTLS_ECP_DP_CURVE448:MBEDTLS_ECP_MOD_SCALAR
+
+ecp_add_sub #48 MBEDTLS_ECP_MOD_SCALAR(MBEDTLS_ECP_DP_CURVE448)
+depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
+ecp_mod_add_sub:"0000000000000003f7defb1691e8e3b705620733deaaddd33a760e17a4e9ba333445533fcd71d42a6d00e3468c946b0ff353728c6173d944afbfae4877c606f":"0000000000000003f96c1d081a3cfe300dc4c27fa2ebbc37396957d4bf81156d86b88de3a9312ca5be57d93fa3549b71895aa36bd5231f38146a2f0970425b":MBEDTLS_ECP_DP_CURVE448:MBEDTLS_ECP_MOD_SCALAR
+
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index 250efcc..eb85dc2 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -1500,7 +1500,6 @@
     memset(A, 0, limbs * ciL);
     ASSERT_COMPARE(&bufx[1], (limbs - 1) * ciL, A, (limbs - 1) * ciL);
 
-
 exit:
     mbedtls_mpi_mod_modulus_free(&m);
     mbedtls_mpi_mod_residue_release(&rA);
@@ -1512,3 +1511,54 @@
     mbedtls_free(bufx);
 }
 /* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
+void ecp_mod_add_sub(char *input_A, char *input_B, int id, int ctype)
+{
+    size_t p_A_limbs;
+    size_t p_B_limbs;
+    size_t bytes;
+    mbedtls_mpi_mod_modulus m;
+    mbedtls_mpi_mod_residue rA;
+    mbedtls_mpi_mod_residue rB;
+    mbedtls_mpi_mod_residue rS;
+    mbedtls_mpi_uint *p_A = NULL;
+    mbedtls_mpi_uint *p_B = NULL;
+    mbedtls_mpi_uint *p_S = NULL;
+
+    mbedtls_mpi_mod_modulus_init(&m);
+
+    TEST_EQUAL(mbedtls_test_read_mpi_core(&p_A, &p_A_limbs, input_A), 0);
+    TEST_EQUAL(mbedtls_test_read_mpi_core(&p_B, &p_B_limbs, input_B), 0);
+
+    TEST_EQUAL(0, mbedtls_ecp_modulus_setup(&m, id, ctype));
+
+    /* Test for limb sizes for two input value and modulus */
+    TEST_EQUAL(p_A_limbs, p_B_limbs);
+    TEST_EQUAL(m.limbs, p_A_limbs);
+    bytes = p_A_limbs * ciL;
+
+    ASSERT_ALLOC(p_S, p_A_limbs);
+
+    TEST_EQUAL(mbedtls_mpi_mod_residue_setup(&rA, &m, p_A, p_A_limbs), 0);
+    TEST_EQUAL(mbedtls_mpi_mod_residue_setup(&rB, &m, p_B, p_B_limbs), 0);
+    TEST_EQUAL(mbedtls_mpi_mod_residue_setup(&rS, &m, p_S, p_A_limbs), 0);
+
+    /* Firstly add A and B to get the sum S, then subtract B,
+     * the difference should be equal to A*/
+    TEST_EQUAL(0, mbedtls_mpi_mod_add(&rS, &rA, &rB, &m));
+    TEST_EQUAL(0, mbedtls_mpi_mod_sub(&rS, &rS, &rB, &m));
+
+    /* Compare difference with rA byte-by-byte */
+    ASSERT_COMPARE(rA.p, bytes, rS.p, bytes);
+
+exit:
+    mbedtls_mpi_mod_modulus_free(&m);
+    mbedtls_mpi_mod_residue_release(&rA);
+    mbedtls_mpi_mod_residue_release(&rB);
+    mbedtls_mpi_mod_residue_release(&rS);
+    mbedtls_free(p_A);
+    mbedtls_free(p_B);
+    mbedtls_free(p_S);
+}
+/* END_CASE */