diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index d8ce37508..d983a0039 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -233,7 +233,7 @@ static int ssl_tls13_offered_psks_check_identity_match_ticket(
      *       sync up their system time every 6000/360/2~=8 hours.
      */
     client_age = obfuscated_ticket_age - session->ticket_age_add;
-    age_diff = server_age - (mbedtls_ms_time_t)client_age;
+    age_diff = server_age - (mbedtls_ms_time_t) client_age;
     if (age_diff < -MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE ||
         age_diff > MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE) {
         MBEDTLS_SSL_DEBUG_MSG(
diff --git a/tests/opt-testcases/tls13-misc.sh b/tests/opt-testcases/tls13-misc.sh
index 3816a2b45..920838449 100755
--- a/tests/opt-testcases/tls13-misc.sh
+++ b/tests/opt-testcases/tls13-misc.sh
@@ -86,7 +86,7 @@ run_test "TLS 1.3 m->m: Session resumption failure, ticket authentication failed
          -S "key exchange mode: psk$" \
          -s "ticket is not authentic" \
          -S "ticket is expired" \
-         -S "Invalid ticket start time" \
+         -S "Invalid ticket creation time" \
          -S "Ticket age exceeds limitation" \
          -S "Ticket age outside tolerance window"
 
@@ -105,7 +105,7 @@ run_test "TLS 1.3 m->m: Session resumption failure, ticket expired." \
          -S "key exchange mode: psk$" \
          -S "ticket is not authentic" \
          -s "ticket is expired" \
-         -S "Invalid ticket start time" \
+         -S "Invalid ticket creation time" \
          -S "Ticket age exceeds limitation" \
          -S "Ticket age outside tolerance window"
 
@@ -124,7 +124,7 @@ run_test "TLS 1.3 m->m: Session resumption failure, invalid start time." \
          -S "key exchange mode: psk$" \
          -S "ticket is not authentic" \
          -S "ticket is expired" \
-         -s "Invalid ticket start time" \
+         -s "Invalid ticket creation time" \
          -S "Ticket age exceeds limitation" \
          -S "Ticket age outside tolerance window"
 
@@ -143,7 +143,7 @@ run_test "TLS 1.3 m->m: Session resumption failure, ticket expired. too old" \
          -S "key exchange mode: psk$" \
          -S "ticket is not authentic" \
          -S "ticket is expired" \
-         -S "Invalid ticket start time" \
+         -S "Invalid ticket creation time" \
          -s "Ticket age exceeds limitation" \
          -S "Ticket age outside tolerance window"
 
@@ -162,7 +162,7 @@ run_test "TLS 1.3 m->m: Session resumption failure, age outside tolerance window
          -S "key exchange mode: psk$" \
          -S "ticket is not authentic" \
          -S "ticket is expired" \
-         -S "Invalid ticket start time" \
+         -S "Invalid ticket creation time" \
          -S "Ticket age exceeds limitation" \
          -s "Ticket age outside tolerance window"
 
@@ -181,7 +181,7 @@ run_test "TLS 1.3 m->m: Session resumption failure, age outside tolerance window
          -S "key exchange mode: psk$" \
          -S "ticket is not authentic" \
          -S "ticket is expired" \
-         -S "Invalid ticket start time" \
+         -S "Invalid ticket creation time" \
          -S "Ticket age exceeds limitation" \
          -s "Ticket age outside tolerance window"