diff --git a/tests/suites/test_suite_ecdh.data b/tests/suites/test_suite_ecdh.data
index 8d0606704f..395bbbbde2 100644
--- a/tests/suites/test_suite_ecdh.data
+++ b/tests/suites/test_suite_ecdh.data
@@ -81,6 +81,16 @@ ECDH calc_secret: theirs first, SECP256R1 (RFC 5903)
 depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
 ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_SECP256R1:"c6ef9c5d78ae012a011164acb397ce2088685d8f06bf9be0b283ab46476bee53":"04dad0b65394221cf9b051e1feca5787d098dfe637fc90b9ef945d0c37725811805271a0461cdb8252d61f1c456fa3e59ab1f45b33accf5f58389e0577b8990bb3":1:"d6840f6b42f6edafd13116e0e12565202fef8e9ece7dce03812464d04b9442de"
 
+# see generating script in previous commit message
+ECDH calc_secret: leading zero, SECP256R1
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_SECP256R1:"800000000000000000000000000000000000000000000000000000000000000e":"046b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c2964fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5":0:"0054fe92ec56ef5ad8bf4d9c46d2ca773af76c2e8c8b00e20ab772cf8b34348f"
+
+# see generating script in previous commit message
+ECDH calc_secret: leading zero, SECP521R1
+depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_SECP521R1:"010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":"0400c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66011839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650":0:"002da7db02840f023a36e1fffeaee16d3c47bb435bec6a231d4aab1ec5412f56fb90fcc4eaab9fd8571084cb9da252466c052d21913ce0fda47e61829972ce8f9a17"
+
 ecdh calc_secret: ours first (Alice), curve25519 (rfc 7748)
 depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
 ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_CURVE25519:"77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a":"de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f":0:"4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742"
@@ -93,6 +103,16 @@ ecdh calc_secret: ours first (Bob), curve25519 (rfc 7748)
 depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
 ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_CURVE25519:"5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb":"8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a":0:"4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742"
 
+# see generating script in previous commit message
+ecdh calc_secret: MSB zero, curve25519
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_CURVE25519:"8813000000000000000000000000000000000000000000000000000000000040":"0900000000000000000000000000000000000000000000000000000000000000":0:"9ec15224edbe326c5b40fa30311421f1fb309fdd0fcaf472b5d0ad2067b7db00"
+
+# see generating script in previous commit message
+ecdh calc_secret: MSB zero, curve448
+depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
+ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_CURVE448:"d805000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000080":"0500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":0:"517b6be2c2edd157319082d4ddc688add71297284b6da74b050170035d764c19b8a14da4600715b18d8a3320a8e18a1d80fc9e6f7ea85600"
+
 ECDH get_params with mismatched groups: our BP256R1, their SECP256R1
 depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_BP256R1_ENABLED
 ecdh_exchange_get_params_fail:MBEDTLS_ECP_DP_BP256R1:"1234567812345678123456781234567812345678123456781234567812345678":MBEDTLS_ECP_DP_SECP256R1:"04dad0b65394221cf9b051e1feca5787d098dfe637fc90b9ef945d0c37725811805271a0461cdb8252d61f1c456fa3e59ab1f45b33accf5f58389e0577b8990bb3":0:MBEDTLS_ERR_ECP_BAD_INPUT_DATA