diff --git a/tests/suites/test_suite_pkwrite.data b/tests/suites/test_suite_pkwrite.data
index 0c1c02b02..8e1532500 100644
--- a/tests/suites/test_suite_pkwrite.data
+++ b/tests/suites/test_suite_pkwrite.data
@@ -30,6 +30,14 @@ Private key write check EC 192 bits
 depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_key_check:"data_files/ec_prv.sec1.pem"
 
+Private key write check EC 256 bits (legacy ECC)
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
+pk_write_key_check:"data_files/ec_256_prv.pem"
+
+Private key write check EC 256 bits (TinyCrypt)
+depends_on:MBEDTLS_BASE64_C:MBEDTLS_USE_TINYCRYPT
+pk_write_key_check:"data_files/ec_256_prv.pem"
+
 Private key write check EC 521 bits
 depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_key_check:"data_files/ec_521_prv.pem"