diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 74b673b..1b3708f 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -14478,8 +14478,12 @@
 # OpenSSL does not allow max_send_frag to be less than 512
 # so we use split_send_frag instead for tests lower than 512 below.
 
+# There is an issue with OpenSSL when fragmenting with values less
+# than 512 bytes in TLS 1.2 so we require TLS 1.3 with these values.
+
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (256)" \
             "$O_NEXT_SRV -split_send_frag 256 " \
             "$P_CLI debug_level=4 " \
@@ -14489,6 +14493,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (128)" \
             "$O_NEXT_SRV -split_send_frag 128 " \
             "$P_CLI debug_level=4 " \
@@ -14498,6 +14503,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (64)" \
             "$O_NEXT_SRV -split_send_frag 64 " \
             "$P_CLI debug_level=4 " \
@@ -14507,6 +14513,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (36)" \
             "$O_NEXT_SRV -split_send_frag 36 " \
             "$P_CLI debug_level=4 " \
@@ -14516,6 +14523,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (32)" \
             "$O_NEXT_SRV -split_send_frag 32 " \
             "$P_CLI debug_level=4 " \
@@ -14525,6 +14533,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (16)" \
             "$O_NEXT_SRV -split_send_frag 16 " \
             "$P_CLI debug_level=4 " \
@@ -14534,6 +14543,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (13)" \
             "$O_NEXT_SRV -split_send_frag 13 " \
             "$P_CLI debug_level=4 " \
@@ -14543,6 +14553,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Client Handshake defragmentation (5)" \
             "$O_NEXT_SRV -split_send_frag 5 " \
             "$P_CLI debug_level=4 " \
@@ -14570,6 +14581,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (256)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 256 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14579,6 +14591,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (128)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 128 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14588,6 +14601,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (64)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 64 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14597,6 +14611,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (36)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 36 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14606,6 +14621,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (32)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 32 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14615,6 +14631,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (16)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 16 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14624,6 +14641,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (13)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 13 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
@@ -14633,6 +14651,7 @@
 
 requires_openssl_tls1_3
 requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 run_test    "Server Handshake defragmentation (5)" \
             "$P_SRV debug_level=4 auth_mode=required" \
             "$O_NEXT_CLI -split_send_frag 5 -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \