diff --git a/tests/suites/test_suite_psa_crypto_util.data b/tests/suites/test_suite_psa_crypto_util.data
index 4bb2044..49b4919 100644
--- a/tests/suites/test_suite_psa_crypto_util.data
+++ b/tests/suites/test_suite_psa_crypto_util.data
@@ -62,6 +62,14 @@
 depends_on:PSA_WANT_ECC_SECP_K1_256
 ecdsa_der_to_raw:256:"30440220111111111111111111111111111111111111111111111111111111111111111102212222222222222222222222222222222222222222222222222222222222222222":"11111111111111111111111111111111111111111111111111111111111111112222222222222222222222222222222222222222222222222222222222222222":MBEDTLS_ERR_ASN1_OUT_OF_DATA
 
+ECDSA DER -> Raw, 256bit, r with MSb set
+depends_on:PSA_WANT_ECC_SECP_K1_256
+ecdsa_der_to_raw:256:"3045022100911111111111111111111111111111111111111111111111111111111111111102202222222222222222222222222222222222222222222222222222222222222222":"91111111111111111111111111111111111111111111111111111111111111112222222222222222222222222222222222222222222222222222222222222222":0
+
+ECDSA DER -> Raw, 256bit, Invalid r (only 1 zero byte)
+depends_on:PSA_WANT_ECC_SECP_K1_256
+ecdsa_der_to_raw:256:"302502010002202222222222222222222222222222222222222222222222222222222222222222":"11111111111111111111111111111111111111111111111111111111111111112222222222222222222222222222222222222222222222222222222222222222":MBEDTLS_ERR_ASN1_LENGTH_MISMATCH
+
 # 512/521 bit sizes are useful to test sequence's length encoded with 2 bytes.
 ECDSA Raw -> DER, 512bit, Success
 depends_on:PSA_WANT_ECC_BRAINPOOL_P_R1_512