Fix test description

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/docs/architecture/tls13-experimental.md b/docs/architecture/tls13-experimental.md
index 5a73715..5d7c14f 100644
--- a/docs/architecture/tls13-experimental.md
+++ b/docs/architecture/tls13-experimental.md
@@ -218,10 +218,9 @@
 - Quality considerations
   - Standard Mbed TLS review bar
   - Interoperability testing with OpenSSL and GnuTLS. Test with all the
-    cipher suites supported by OpenSSL/GnuTLS server with and without
-    certificate base authentication.
+    cipher suites and signature algorithms supported by OpenSSL/GnuTLS server.
   - Negative testing against OpenSSL/GnuTLS servers with which the
-    handshake fails due to imcompatibility with the capabilities of the
+    handshake fails due to incompatibility with the capabilities of the
     MVP: TLS 1.2 or 1.1 server, server sending an HelloRetryRequest message in
     response to the MVP ClientHello, server sending a CertificateRequest
     message ...