diff --git a/tests/suites/test_suite_ssl.data b/tests/suites/test_suite_ssl.data
index 78560d1..45e7d44 100644
--- a/tests/suites/test_suite_ssl.data
+++ b/tests/suites/test_suite_ssl.data
@@ -8736,3 +8736,26 @@
 Session serialisation, load-save: large ticket, cert
 depends_on:MBEDTLS_SSL_SESSION_TICKETS:MBEDTLS_SSL_CLI_C:MBEDTLS_X509_USE_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
 ssl_serialise_session_load_save:1023:"data_files/server5.crt"
+
+Session serialisation, save buffer size: no ticket, no cert
+ssl_serialise_session_save_buf_size:0:""
+
+Session serialisation, save buffer size: small ticket, no cert
+depends_on:MBEDTLS_SSL_SESSION_TICKETS:MBEDTLS_SSL_CLI_C
+ssl_serialise_session_save_buf_size:42:""
+
+Session serialisation, save buffer size: large ticket, no cert
+depends_on:MBEDTLS_SSL_SESSION_TICKETS:MBEDTLS_SSL_CLI_C
+ssl_serialise_session_save_buf_size:1023:""
+
+Session serialisation, save buffer size: no ticket, cert
+depends_on:MBEDTLS_X509_USE_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
+ssl_serialise_session_save_buf_size:0:"data_files/server5.crt"
+
+Session serialisation, save buffer size: small ticket, cert
+depends_on:MBEDTLS_SSL_SESSION_TICKETS:MBEDTLS_SSL_CLI_C:MBEDTLS_X509_USE_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
+ssl_serialise_session_save_buf_size:42:"data_files/server5.crt"
+
+Session serialisation, save buffer size: large ticket, cert
+depends_on:MBEDTLS_SSL_SESSION_TICKETS:MBEDTLS_SSL_CLI_C:MBEDTLS_X509_USE_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
+ssl_serialise_session_save_buf_size:1023:"data_files/server5.crt"
diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index ea2d685..b08f5dc 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -682,3 +682,39 @@
     mbedtls_free( buf2 );
 }
 /* END_CASE */
+
+/* BEGIN_CASE */
+void ssl_serialise_session_save_buf_size( int ticket_len, char *crt_file )
+{
+    mbedtls_ssl_session session;
+    unsigned char *buf = NULL;
+    size_t good_len, bad_len, test_len;
+
+    /*
+     * Test that session_save() fails cleanly on small buffers
+     */
+
+    mbedtls_ssl_session_init( &session );
+
+    /* Prepare dummy session and get serialised size */
+    ssl_populate_session( &session, ticket_len, crt_file );
+    TEST_ASSERT( mbedtls_ssl_session_save( &session, NULL, 0, &good_len )
+                 == MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
+
+    /* Try all possible bad lengths */
+    for( bad_len = 1; bad_len < good_len; bad_len++ )
+    {
+        /* Allocate exact size so that asan/valgrind can detect any overwrite */
+        mbedtls_free( buf );
+        TEST_ASSERT( ( buf = mbedtls_calloc( 1, bad_len ) ) != NULL );
+        TEST_ASSERT( mbedtls_ssl_session_save( &session, buf, bad_len,
+                                               &test_len )
+                     == MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
+        TEST_ASSERT( test_len == good_len );
+    }
+
+exit:
+    mbedtls_ssl_session_free( &session );
+    mbedtls_free( buf );
+}
+/* END_CASE */