diff --git a/tests/include/test/ssl_helpers.h b/tests/include/test/ssl_helpers.h
index b46861b0d..b7d990060 100644
--- a/tests/include/test/ssl_helpers.h
+++ b/tests/include/test/ssl_helpers.h
@@ -547,7 +547,7 @@ void mbedtls_test_ssl_perform_handshake(
  *                    is expected to fail. All zeroes if no
  *                    MBEDTLS_SSL_CHK_BUF_READ_PTR failure is expected.
  */
-int tweak_tls13_certificate_msg_vector_len(
+int mbedtls_test_tweak_tls13_certificate_msg_vector_len(
     unsigned char *buf, unsigned char **end, int tweak,
     int *expected_result, mbedtls_ssl_chk_buf_ptr_args *args);
 #endif /* MBEDTLS_TEST_HOOKS */
diff --git a/tests/src/test_helpers/ssl_helpers.c b/tests/src/test_helpers/ssl_helpers.c
index d17d8ac93..52e288d5f 100644
--- a/tests/src/test_helpers/ssl_helpers.c
+++ b/tests/src/test_helpers/ssl_helpers.c
@@ -2131,7 +2131,7 @@ exit:
 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
 
 #if defined(MBEDTLS_TEST_HOOKS)
-int tweak_tls13_certificate_msg_vector_len(
+int mbedtls_test_tweak_tls13_certificate_msg_vector_len(
     unsigned char *buf, unsigned char **end, int tweak,
     int *expected_result, mbedtls_ssl_chk_buf_ptr_args *args)
 {
diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index c9178e326..33ab57711 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -3358,7 +3358,7 @@ void tls13_server_certificate_msg_invalid_vector_len()
          * Tweak server Certificate message and parse it.
          */
 
-        ret = tweak_tls13_certificate_msg_vector_len(
+        ret = mbedtls_test_tweak_tls13_certificate_msg_vector_len(
             buf, &end, step, &expected_result, &expected_chk_buf_ptr_args);
 
         if (ret != 0) {