diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index 563d86e..d137b25 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -344,7 +344,12 @@
 server5-two-directorynames.crt.der: server5.key
 	$(OPENSSL) req -x509 -outform der -new -subj "/C=UK/O=Mbed TLS/CN=Mbed TLS directoryName SAN" -set_serial 77 -config $(test_ca_config_file) -extensions two_directorynames -days 3650 -sha256 -key server5.key -out $@
 
-server5-second-directoryname-malformed.crt.der: server5-two-directorynames.crt.der
+# directoryname sequence tag malformed
+server5-directoryname-seq-malformed.crt.der: server5-two-directorynames.crt.der
+	hexdump -ve '1/1 "%.2X"' $< | sed "s/62A4473045310B/62A4473145310B/" | xxd -r -p > $@
+	
+# Second directoryname OID length malformed 03 -> 15
+server5-second-directoryname-oid-malformed.crt.der: server5-two-directorynames.crt.der
 	hexdump -ve '1/1 "%.2X"' $< | sed "s/0355040A0C0A4D414C464F524D5F4D45/1555040A0C0A4D414C464F524D5F4D45/" | xxd -r -p > $@
 
 all_final += server5-tricky-ip-san.crt
diff --git a/tests/data_files/server5-directoryname-seq-malformed.crt.der b/tests/data_files/server5-directoryname-seq-malformed.crt.der
new file mode 100644
index 0000000..4b0c325
--- /dev/null
+++ b/tests/data_files/server5-directoryname-seq-malformed.crt.der
Binary files differ
diff --git a/tests/data_files/server5-second-directoryname-malformed.crt.der b/tests/data_files/server5-second-directoryname-oid-malformed.crt.der
similarity index 100%
rename from tests/data_files/server5-second-directoryname-malformed.crt.der
rename to tests/data_files/server5-second-directoryname-oid-malformed.crt.der
Binary files differ
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index 8df53df..2c48fc7 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -95,16 +95,16 @@
 x509_cert_info:"data_files/server5-nonprintable_othername.crt":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS non-printable othername SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS non-printable othername SAN\nissued  on        \: 2022-09-06 15\:56\:47\nexpires on        \: 2032-09-03 15\:56\:47\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    otherName \:\n        hardware module name \:\n            hardware type          \: 1.3.6.1.4.1.17.3\n            hardware serial number \: 3132338081008180333231\n"
 
 X509 CRT information EC, SHA256 Digest, directoryName SAN
-depends_on:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA
+depends_on:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
 x509_cert_info:"data_files/server5-directoryname.crt.der":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nissued  on        \: 2023-01-10 16\:59\:29\nexpires on        \: 2033-01-07 16\:59\:29\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    directoryName \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\n"
 
 X509 CRT information EC, SHA256 Digest, two directoryName SANs
-depends_on:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA
+depends_on:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
 x509_cert_info:"data_files/server5-two-directorynames.crt.der":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nissued  on        \: 2023-01-12 10\:34\:11\nexpires on        \: 2033-01-09 10\:34\:11\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    directoryName \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\n    directoryName \: O=MALFORM_ME\n"
 
-X509 CRT information EC, SHA256 Digest, second directoryname malformed
-depends_on:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA
-x509_cert_info:"data_files/server5-second-directoryname-malformed.crt.der":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nissued  on        \: 2023-01-12 10\:34\:11\nexpires on        \: 2033-01-09 10\:34\:11\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    directoryName \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\n    <malformed>\n"
+X509 CRT information EC, SHA256 Digest, second DN OID malformed
+depends_on:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
+x509_cert_info:"data_files/server5-second-directoryname-oid-malformed.crt.der":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\nissued  on        \: 2023-01-12 10\:34\:11\nexpires on        \: 2033-01-09 10\:34\:11\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    directoryName \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\n    <malformed>\n"
 
 X509 CRT information EC, SHA256 Digest, Wisun Fan device
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
@@ -196,31 +196,35 @@
 
 X509 SAN parsing otherName
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
-x509_parse_san:"data_files/server5-othername.crt":"type \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 313233343536\n"
+x509_parse_san:"data_files/server5-othername.crt":"type \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 313233343536\n":0
 
 X509 SAN parsing binary otherName
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
-x509_parse_san:"data_files/server5-nonprintable_othername.crt":"type \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 3132338081008180333231\n"
+x509_parse_san:"data_files/server5-nonprintable_othername.crt":"type \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 3132338081008180333231\n":0
 
 X509 SAN parsing directoryName
-depends_on:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA
-x509_parse_san:"data_files/server5-directoryname.crt.der":"type \: 4\ndirectoryName \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\n"
+depends_on:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
+x509_parse_san:"data_files/server5-directoryname.crt.der":"type \: 4\ndirectoryName \: C=UK, O=Mbed TLS, CN=Mbed TLS directoryName SAN\n":0
+
+X509 SAN parsing directoryName, seq malformed
+depends_on:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
+x509_parse_san:"data_files/server5-directoryname-seq-malformed.crt.der":"":MBEDTLS_ERR_ASN1_UNEXPECTED_TAG
 
 X509 SAN parsing dNSName
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256
-x509_parse_san:"data_files/cert_example_multi.crt":"type \: 2\ndNSName \: example.com\ntype \: 2\ndNSName \: example.net\ntype \: 2\ndNSName \: *.example.org\n"
+x509_parse_san:"data_files/cert_example_multi.crt":"type \: 2\ndNSName \: example.com\ntype \: 2\ndNSName \: example.net\ntype \: 2\ndNSName \: *.example.org\n":0
 
 X509 SAN parsing  Multiple different types
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
-x509_parse_san:"data_files/multiple_san.crt":"type \: 2\ndNSName \: example.com\ntype \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 313233343536\ntype \: 2\ndNSName \: example.net\ntype \: 2\ndNSName \: *.example.org\n"
+x509_parse_san:"data_files/multiple_san.crt":"type \: 2\ndNSName \: example.com\ntype \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 313233343536\ntype \: 2\ndNSName \: example.net\ntype \: 2\ndNSName \: *.example.org\n":0
 
 X509 SAN parsing, no subject alt name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256:MBEDTLS_PK_CAN_ECDSA_SOME
-x509_parse_san:"data_files/server4.crt":""
+x509_parse_san:"data_files/server4.crt":"":0
 
 X509 SAN parsing, unsupported otherName name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_PK_CAN_ECDSA_SOME:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_MD_CAN_SHA256
-x509_parse_san:"data_files/server5-unsupported_othername.crt":""
+x509_parse_san:"data_files/server5-unsupported_othername.crt":"":0
 
 X509 SAN parsing rfc822Name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index 29c0574..177bc97 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -437,7 +437,7 @@
 /* END_CASE */
 
 /* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
-void x509_parse_san(char *crt_file, char *result_str)
+void x509_parse_san(char *crt_file, char *result_str, int parse_result)
 {
     int ret;
     mbedtls_x509_crt   crt;
@@ -450,8 +450,11 @@
     mbedtls_x509_crt_init(&crt);
     memset(buf, 0, 2000);
 
-    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
+    TEST_EQUAL(mbedtls_x509_crt_parse_file(&crt, crt_file), parse_result);
 
+    if (parse_result != 0) {
+        goto exit;
+    }
     if (crt.ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME) {
         cur = &crt.subject_alt_names;
         while (cur != NULL) {