diff --git a/ChangeLog.d/bug_order_x448.txt b/ChangeLog.d/bug_order_x448.txt
new file mode 100644
index 0000000..cebefc4
--- /dev/null
+++ b/ChangeLog.d/bug_order_x448.txt
@@ -0,0 +1,2 @@
+Bugfix
+    * Fix order value of curve x448.
diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index 6b8ff5c..51956cd 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -4737,6 +4737,8 @@
     ECP_VALIDATE_RET( grp != NULL );
     mbedtls_ecp_group_free( grp );
 
+    mbedtls_ecp_group_init( grp );
+
     grp->id = id;
 
     switch( id )
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index b1f0c90..119826f 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2280,4 +2280,16 @@
                                            mbedtls_pk_context *own_key,
                                            uint16_t *algorithm );
 
+#if defined(MBEDTLS_SSL_ALPN)
+int mbedtls_ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
+                                const unsigned char *buf,
+                                const unsigned char *end );
+
+
+int mbedtls_ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
+                                unsigned char *buf,
+                                unsigned char *end,
+                                size_t *out_len );
+#endif /* MBEDTLS_SSL_ALPN */
+
 #endif /* ssl_misc.h */
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index ba6d47d..5fa02d2 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -8285,4 +8285,125 @@
 }
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
 
+#if defined(MBEDTLS_SSL_ALPN)
+int mbedtls_ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
+                                const unsigned char *buf,
+                                const unsigned char *end )
+{
+    const unsigned char *p = buf;
+    size_t protocol_name_list_len;
+    const unsigned char *protocol_name_list;
+    const unsigned char *protocol_name_list_end;
+    size_t protocol_name_len;
+
+    /* If ALPN not configured, just ignore the extension */
+    if( ssl->conf->alpn_list == NULL )
+        return( 0 );
+
+    /*
+     * RFC7301, section 3.1
+     *      opaque ProtocolName<1..2^8-1>;
+     *
+     *      struct {
+     *          ProtocolName protocol_name_list<2..2^16-1>
+     *      } ProtocolNameList;
+     */
+
+    /*
+     * protocol_name_list_len    2 bytes
+     * protocol_name_len         1 bytes
+     * protocol_name             >=1 byte
+     */
+    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 4 );
+
+    protocol_name_list_len = MBEDTLS_GET_UINT16_BE( p, 0 );
+    p += 2;
+    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, protocol_name_list_len );
+    protocol_name_list = p;
+    protocol_name_list_end = p + protocol_name_list_len;
+
+    /* Validate peer's list (lengths) */
+    while( p < protocol_name_list_end )
+    {
+        protocol_name_len = *p++;
+        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, protocol_name_list_end,
+                                      protocol_name_len );
+        if( protocol_name_len == 0 )
+        {
+            MBEDTLS_SSL_PEND_FATAL_ALERT(
+                MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
+                MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+            return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+        }
+
+        p += protocol_name_len;
+    }
+
+    /* Use our order of preference */
+    for( const char **alpn = ssl->conf->alpn_list; *alpn != NULL; alpn++ )
+    {
+        size_t const alpn_len = strlen( *alpn );
+        p = protocol_name_list;
+        while( p < protocol_name_list_end )
+        {
+            protocol_name_len = *p++;
+            if( protocol_name_len == alpn_len &&
+                memcmp( p, *alpn, alpn_len ) == 0 )
+            {
+                ssl->alpn_chosen = *alpn;
+                return( 0 );
+            }
+
+            p += protocol_name_len;
+        }
+    }
+
+    /* If we get here, no match was found */
+    MBEDTLS_SSL_PEND_FATAL_ALERT(
+            MBEDTLS_SSL_ALERT_MSG_NO_APPLICATION_PROTOCOL,
+            MBEDTLS_ERR_SSL_NO_APPLICATION_PROTOCOL );
+    return( MBEDTLS_ERR_SSL_NO_APPLICATION_PROTOCOL );
+}
+
+int mbedtls_ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
+                                unsigned char *buf,
+                                unsigned char *end,
+                                size_t *out_len )
+{
+    unsigned char *p = buf;
+    size_t protocol_name_len;
+    *out_len = 0;
+
+    if( ssl->alpn_chosen == NULL )
+    {
+        return( 0 );
+    }
+
+    protocol_name_len = strlen( ssl->alpn_chosen );
+    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 7 + protocol_name_len );
+
+    MBEDTLS_SSL_DEBUG_MSG( 3, ( "server side, adding alpn extension" ) );
+    /*
+     * 0 . 1    ext identifier
+     * 2 . 3    ext length
+     * 4 . 5    protocol list length
+     * 6 . 6    protocol name length
+     * 7 . 7+n  protocol name
+     */
+    MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_ALPN, p, 0 );
+
+    *out_len = 7 + protocol_name_len;
+
+    MBEDTLS_PUT_UINT16_BE( protocol_name_len + 3, p, 2 );
+    MBEDTLS_PUT_UINT16_BE( protocol_name_len + 1, p, 4 );
+    /* Note: the length of the chosen protocol has been checked to be less
+     * than 255 bytes in `mbedtls_ssl_conf_alpn_protocols`.
+     */
+    p[6] = MBEDTLS_BYTE_0( protocol_name_len );
+
+    memcpy( p + 7, ssl->alpn_chosen, protocol_name_len );
+    return ( 0 );
+}
+#endif /* MBEDTLS_SSL_ALPN */
+
 #endif /* MBEDTLS_SSL_TLS_C */
diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index e92014c..21e5cda 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -528,94 +528,6 @@
 }
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
-#if defined(MBEDTLS_SSL_ALPN)
-static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
-                               const unsigned char *buf, size_t len )
-{
-    size_t list_len, cur_len, ours_len;
-    const unsigned char *theirs, *start, *end;
-    const char **ours;
-
-    /* If ALPN not configured, just ignore the extension */
-    if( ssl->conf->alpn_list == NULL )
-        return( 0 );
-
-    /*
-     * opaque ProtocolName<1..2^8-1>;
-     *
-     * struct {
-     *     ProtocolName protocol_name_list<2..2^16-1>
-     * } ProtocolNameList;
-     */
-
-    /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
-    if( len < 4 )
-    {
-        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
-        return( MBEDTLS_ERR_SSL_DECODE_ERROR );
-    }
-
-    list_len = ( buf[0] << 8 ) | buf[1];
-    if( list_len != len - 2 )
-    {
-        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
-        return( MBEDTLS_ERR_SSL_DECODE_ERROR );
-    }
-
-    /*
-     * Validate peer's list (lengths)
-     */
-    start = buf + 2;
-    end = buf + len;
-    for( theirs = start; theirs != end; theirs += cur_len )
-    {
-        cur_len = *theirs++;
-
-        /* Current identifier must fit in list */
-        if( cur_len > (size_t)( end - theirs ) )
-        {
-            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
-            return( MBEDTLS_ERR_SSL_DECODE_ERROR );
-        }
-
-        /* Empty strings MUST NOT be included */
-        if( cur_len == 0 )
-        {
-            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                                            MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
-            return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-        }
-    }
-
-    /*
-     * Use our order of preference
-     */
-    for( ours = ssl->conf->alpn_list; *ours != NULL; ours++ )
-    {
-        ours_len = strlen( *ours );
-        for( theirs = start; theirs != end; theirs += cur_len )
-        {
-            cur_len = *theirs++;
-
-            if( cur_len == ours_len &&
-                memcmp( theirs, *ours, cur_len ) == 0 )
-            {
-                ssl->alpn_chosen = *ours;
-                return( 0 );
-            }
-        }
-    }
-
-    /* If we get there, no match was found */
-    mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                            MBEDTLS_SSL_ALERT_MSG_NO_APPLICATION_PROTOCOL );
-    return( MBEDTLS_ERR_SSL_NO_APPLICATION_PROTOCOL );
-}
-#endif /* MBEDTLS_SSL_ALPN */
-
 #if defined(MBEDTLS_SSL_DTLS_SRTP)
 static int ssl_parse_use_srtp_ext( mbedtls_ssl_context *ssl,
                                    const unsigned char *buf,
@@ -1524,7 +1436,8 @@
             case MBEDTLS_TLS_EXT_ALPN:
                 MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
 
-                ret = ssl_parse_alpn_ext( ssl, ext + 4, ext_size );
+                ret = mbedtls_ssl_parse_alpn_ext( ssl, ext + 4,
+                                                  ext + 4 + ext_size );
                 if( ret != 0 )
                     return( ret );
                 break;
@@ -2040,39 +1953,6 @@
 }
 #endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
 
-#if defined(MBEDTLS_SSL_ALPN )
-static void ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
-                                unsigned char *buf, size_t *olen )
-{
-    if( ssl->alpn_chosen == NULL )
-    {
-        *olen = 0;
-        return;
-    }
-
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding alpn extension" ) );
-
-    /*
-     * 0 . 1    ext identifier
-     * 2 . 3    ext length
-     * 4 . 5    protocol list length
-     * 6 . 6    protocol name length
-     * 7 . 7+n  protocol name
-     */
-    MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_ALPN, buf, 0);
-
-    *olen = 7 + strlen( ssl->alpn_chosen );
-
-    MBEDTLS_PUT_UINT16_BE( *olen - 4, buf, 2 );
-
-    MBEDTLS_PUT_UINT16_BE( *olen - 6, buf, 4 );
-
-    buf[6] = MBEDTLS_BYTE_0( *olen - 7 );
-
-    memcpy( buf + 7, ssl->alpn_chosen, *olen - 7 );
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */
-
 #if defined(MBEDTLS_SSL_DTLS_SRTP ) && defined(MBEDTLS_SSL_PROTO_DTLS)
 static void ssl_write_use_srtp_ext( mbedtls_ssl_context *ssl,
                                     unsigned char *buf,
@@ -2446,7 +2326,8 @@
 #endif
 
 #if defined(MBEDTLS_SSL_ALPN)
-    ssl_write_alpn_ext( ssl, p + 2 + ext_len, &olen );
+    unsigned char *end = buf + MBEDTLS_SSL_OUT_CONTENT_LEN - 4;
+    mbedtls_ssl_write_alpn_ext( ssl, p + 2 + ext_len, end, &olen );
     ext_len += olen;
 #endif
 
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index c85ecb5..719bf05 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -303,6 +303,13 @@
                 & MBEDTLS_SSL_EXT_SERVERNAME ) > 0 ) ?
                 "TRUE" : "FALSE" ) );
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
+#if defined ( MBEDTLS_SSL_ALPN )
+    MBEDTLS_SSL_DEBUG_MSG( 3,
+            ( "- ALPN_EXTENSION   ( %s )",
+            ( ( ssl->handshake->extensions_present
+                & MBEDTLS_SSL_EXT_ALPN ) > 0 ) ?
+                "TRUE" : "FALSE" ) );
+#endif /* MBEDTLS_SSL_ALPN */
 }
 #endif /* MBEDTLS_DEBUG_C */
 
@@ -731,6 +738,21 @@
                 ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SUPPORTED_VERSIONS;
                 break;
 
+#if defined(MBEDTLS_SSL_ALPN)
+            case MBEDTLS_TLS_EXT_ALPN:
+                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
+
+                ret = mbedtls_ssl_parse_alpn_ext( ssl, p, extension_data_end );
+                if( ret != 0 )
+                {
+                    MBEDTLS_SSL_DEBUG_RET(
+                            1, ( "mbedtls_ssl_parse_alpn_ext" ), ret );
+                    return( ret );
+                }
+                ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_ALPN;
+                break;
+#endif /* MBEDTLS_SSL_ALPN */
+
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
             case MBEDTLS_TLS_EXT_SIG_ALG:
                 MBEDTLS_SSL_DEBUG_MSG( 3, ( "found signature_algorithms extension" ) );
@@ -1361,9 +1383,11 @@
                                                       unsigned char *end,
                                                       size_t *out_len )
 {
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = buf;
     size_t extensions_len = 0;
     unsigned char *p_extensions_len;
+    size_t output_len;
 
     *out_len = 0;
 
@@ -1372,6 +1396,15 @@
     p += 2;
 
     ((void) ssl);
+    ((void) ret);
+    ((void) output_len);
+
+#if defined(MBEDTLS_SSL_ALPN)
+    ret = mbedtls_ssl_write_alpn_ext( ssl, p, end, &output_len );
+    if( ret != 0 )
+        return( ret );
+    p += output_len;
+#endif /* MBEDTLS_SSL_ALPN */
 
     extensions_len = ( p - p_extensions_len ) - 2;
     MBEDTLS_PUT_UINT16_BE( extensions_len, p_extensions_len, 0 );
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 79ea4c9..0b6711c 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -5879,7 +5879,6 @@
 
 # Tests for ALPN extension
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: none" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3" \
@@ -5887,12 +5886,11 @@
             -C "client hello, adding alpn extension" \
             -S "found alpn extension" \
             -C "got an alert message, type: \\[2:120]" \
-            -S "server hello, adding alpn extension" \
+            -S "server side, adding alpn extension" \
             -C "found alpn extension " \
             -C "Application Layer Protocol is" \
             -S "Application Layer Protocol is"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: client only" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3 alpn=abc,1234" \
@@ -5900,12 +5898,11 @@
             -c "client hello, adding alpn extension" \
             -s "found alpn extension" \
             -C "got an alert message, type: \\[2:120]" \
-            -S "server hello, adding alpn extension" \
+            -S "server side, adding alpn extension" \
             -C "found alpn extension " \
             -c "Application Layer Protocol is (none)" \
             -S "Application Layer Protocol is"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: server only" \
             "$P_SRV debug_level=3 alpn=abc,1234" \
             "$P_CLI debug_level=3" \
@@ -5913,12 +5910,11 @@
             -C "client hello, adding alpn extension" \
             -S "found alpn extension" \
             -C "got an alert message, type: \\[2:120]" \
-            -S "server hello, adding alpn extension" \
+            -S "server side, adding alpn extension" \
             -C "found alpn extension " \
             -C "Application Layer Protocol is" \
             -s "Application Layer Protocol is (none)"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: both, common cli1-srv1" \
             "$P_SRV debug_level=3 alpn=abc,1234" \
             "$P_CLI debug_level=3 alpn=abc,1234" \
@@ -5926,12 +5922,11 @@
             -c "client hello, adding alpn extension" \
             -s "found alpn extension" \
             -C "got an alert message, type: \\[2:120]" \
-            -s "server hello, adding alpn extension" \
+            -s "server side, adding alpn extension" \
             -c "found alpn extension" \
             -c "Application Layer Protocol is abc" \
             -s "Application Layer Protocol is abc"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: both, common cli2-srv1" \
             "$P_SRV debug_level=3 alpn=abc,1234" \
             "$P_CLI debug_level=3 alpn=1234,abc" \
@@ -5939,12 +5934,11 @@
             -c "client hello, adding alpn extension" \
             -s "found alpn extension" \
             -C "got an alert message, type: \\[2:120]" \
-            -s "server hello, adding alpn extension" \
+            -s "server side, adding alpn extension" \
             -c "found alpn extension" \
             -c "Application Layer Protocol is abc" \
             -s "Application Layer Protocol is abc"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: both, common cli1-srv2" \
             "$P_SRV debug_level=3 alpn=abc,1234" \
             "$P_CLI debug_level=3 alpn=1234,abcde" \
@@ -5952,12 +5946,11 @@
             -c "client hello, adding alpn extension" \
             -s "found alpn extension" \
             -C "got an alert message, type: \\[2:120]" \
-            -s "server hello, adding alpn extension" \
+            -s "server side, adding alpn extension" \
             -c "found alpn extension" \
             -c "Application Layer Protocol is 1234" \
             -s "Application Layer Protocol is 1234"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 run_test    "ALPN: both, no common" \
             "$P_SRV debug_level=3 alpn=abc,123" \
             "$P_CLI debug_level=3 alpn=1234,abcde" \
@@ -5965,7 +5958,7 @@
             -c "client hello, adding alpn extension" \
             -s "found alpn extension" \
             -c "got an alert message, type: \\[2:120]" \
-            -S "server hello, adding alpn extension" \
+            -S "server side, adding alpn extension" \
             -C "found alpn extension" \
             -C "Application Layer Protocol is 1234" \
             -S "Application Layer Protocol is 1234"
@@ -10549,6 +10542,36 @@
             -c "HTTP/1.0 200 OK" \
             -c "Application Layer Protocol is h2"
 
+requires_openssl_tls1_3
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
+requires_config_enabled MBEDTLS_DEBUG_C
+requires_config_enabled MBEDTLS_SSL_SRV_C
+requires_config_enabled MBEDTLS_SSL_ALPN
+run_test    "TLS 1.3: server alpn - openssl" \
+            "$P_SRV debug_level=3 tickets=0 crt_file=data_files/server5.crt key_file=data_files/server5.key force_version=tls13 alpn=h2" \
+            "$O_NEXT_CLI -msg -tls1_3 -no_middlebox -alpn h2" \
+            0 \
+            -s "found alpn extension" \
+            -s "server side, adding alpn extension" \
+            -s "Protocol is TLSv1.3" \
+            -s "HTTP/1.0 200 OK" \
+            -s "Application Layer Protocol is h2"
+
+requires_gnutls_tls1_3
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
+requires_config_enabled MBEDTLS_DEBUG_C
+requires_config_enabled MBEDTLS_SSL_SRV_C
+requires_config_enabled MBEDTLS_SSL_ALPN
+run_test    "TLS 1.3: server alpn - gnutls" \
+            "$P_SRV debug_level=3 tickets=0 crt_file=data_files/server5.crt key_file=data_files/server5.key force_version=tls13 alpn=h2" \
+            "$G_NEXT_CLI localhost -d 4 --priority=NORMAL:-VERS-ALL:+VERS-TLS1.3:%NO_TICKETS:%DISABLE_TLS13_COMPAT_MODE -V --alpn h2" \
+            0 \
+            -s "found alpn extension" \
+            -s "server side, adding alpn extension" \
+            -s "Protocol is TLSv1.3" \
+            -s "HTTP/1.0 200 OK" \
+            -s "Application Layer Protocol is h2"
+
 requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 requires_config_enabled MBEDTLS_DEBUG_C
 requires_config_enabled MBEDTLS_SSL_CLI_C
diff --git a/tests/suites/test_suite_ecp.data b/tests/suites/test_suite_ecp.data
index 2eb8c2d..4ea4d3b 100644
--- a/tests/suites/test_suite_ecp.data
+++ b/tests/suites/test_suite_ecp.data
@@ -890,3 +890,56 @@
 ECP export key parameters #2 (invalid group)
 depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
 ecp_export:MBEDTLS_ECP_DP_SECP256R1:"37cc56d976091e5a723ec7592dff206eee7cf9069174d0ad14b5f76822596292":"4ee500d82311ffea2fd2345d5d16bd8a88c26b770d55cd8a2a0efa01c8b4edff":"00f12a1320760270a83cbffd53f6031ef76a5d86c8a204f2c30ca9ebf51f0f0ea7":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE:1
+
+ECP check order for SECP192R1
+depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP192R1:"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831"
+
+ECP check order for SECP224R1
+depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP224R1:"FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D"
+
+ECP check order for SECP256R1
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP256R1:"FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551"
+
+ECP check order for SECP384R1
+depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP384R1:"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973"
+
+ECP check order for SECP521R1
+depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP521R1:"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409"
+
+ECP check order for BP256R1
+depends_on:MBEDTLS_ECP_DP_BP256R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_BP256R1:"A9FB57DBA1EEA9BC3E660A909D838D718C397AA3B561A6F7901E0E82974856A7"
+
+ECP check order for BP384R1
+depends_on:MBEDTLS_ECP_DP_BP384R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_BP384R1:"8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B31F166E6CAC0425A7CF3AB6AF6B7FC3103B883202E9046565"
+
+ECP check order for BP512R1
+depends_on:MBEDTLS_ECP_DP_BP512R1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_BP512R1:"AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA70330870553E5C414CA92619418661197FAC10471DB1D381085DDADDB58796829CA90069"
+
+ECP check order for CURVE25519
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_CURVE25519:"1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed"
+
+ECP check order for SECP192K1
+depends_on:MBEDTLS_ECP_DP_SECP192K1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP192K1:"fffffffffffffffffffffffe26f2fc170f69466a74defd8d"
+
+ECP check order for SECP224K1
+depends_on:MBEDTLS_ECP_DP_SECP224K1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP224K1:"10000000000000000000000000001dce8d2ec6184caf0a971769fb1f7"
+
+ECP check order for SECP256K1
+depends_on:MBEDTLS_ECP_DP_SECP256K1_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_SECP256K1:"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141"
+
+ECP check order for CURVE448
+depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
+ecp_check_order:MBEDTLS_ECP_DP_CURVE448:"3fffffffffffffffffffffffffffffffffffffffffffffffffffffff7cca23e9c44edb49aed63690216cc2728dc58f552378c292ab5844f3"
+
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index c3e6b05..1b77f1d 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -1063,3 +1063,27 @@
     mbedtls_ecp_point_free( &export_Q );
 }
 /* END_CASE */
+
+/* BEGIN_CASE */
+void ecp_check_order( int id, char * expected_order_hex )
+{
+    mbedtls_ecp_group grp;
+    mbedtls_mpi expected_n;
+
+    mbedtls_ecp_group_init( &grp );
+    mbedtls_mpi_init( &expected_n );
+
+    TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
+    TEST_ASSERT( mbedtls_test_read_mpi( &expected_n, 16, expected_order_hex ) == 0);
+
+    // check sign bits are well-formed (i.e. 1 or -1) - see #5810
+    TEST_ASSERT( grp.N.s == -1 || grp.N.s == 1);
+    TEST_ASSERT( expected_n.s == -1 || expected_n.s == 1);
+
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &grp.N, &expected_n ) == 0 );
+
+exit:
+    mbedtls_ecp_group_free( &grp );
+    mbedtls_mpi_free( &expected_n );
+}
+/* END_CASE */