diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index a6b59ae..33a9d4f 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -2155,7 +2155,7 @@
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "CA callback on client" \
             "$P_SRV debug_level=3" \
-            "$P_CLI force_version=tls12 ca_callback=1 debug_level=3 " \
+            "$P_CLI ca_callback=1 debug_level=3 " \
             0 \
             -c "use CA callback for X.509 CRT verification" \
             -S "error" \
@@ -2165,7 +2165,7 @@
 requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
 requires_hash_alg SHA_256
 run_test    "CA callback on server" \
-            "$P_SRV force_version=tls12 auth_mode=required" \
+            "$P_SRV auth_mode=required" \
             "$P_CLI ca_callback=1 debug_level=3 crt_file=$DATA_FILES_PATH/server5.crt \
              key_file=$DATA_FILES_PATH/server5.key" \
             0 \
@@ -6308,7 +6308,7 @@
 run_test    "Authentication, CA callback: server badcert, client required" \
             "$P_SRV crt_file=$DATA_FILES_PATH/server5-badsign.crt \
              key_file=$DATA_FILES_PATH/server5.key" \
-            "$P_CLI force_version=tls12 ca_callback=1 debug_level=3 auth_mode=required" \
+            "$P_CLI ca_callback=1 debug_level=3 auth_mode=required" \
             1 \
             -c "use CA callback for X.509 CRT verification" \
             -c "x509_verify_cert() returned" \
@@ -6320,7 +6320,7 @@
 run_test    "Authentication, CA callback: server badcert, client optional" \
             "$P_SRV crt_file=$DATA_FILES_PATH/server5-badsign.crt \
              key_file=$DATA_FILES_PATH/server5.key" \
-            "$P_CLI force_version=tls12 ca_callback=1 debug_level=3 auth_mode=optional" \
+            "$P_CLI ca_callback=1 debug_level=3 auth_mode=optional" \
             0 \
             -c "use CA callback for X.509 CRT verification" \
             -c "x509_verify_cert() returned" \
@@ -6328,6 +6328,18 @@
             -C "! mbedtls_ssl_handshake returned" \
             -C "X509 - Certificate verification failed"
 
+requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
+run_test    "Authentication, CA callback: server badcert, client none" \
+            "$P_SRV crt_file=$DATA_FILES_PATH/server5-badsign.crt \
+             key_file=$DATA_FILES_PATH/server5.key" \
+            "$P_CLI ca_callback=1 debug_level=3 auth_mode=none" \
+            0 \
+            -C "use CA callback for X.509 CRT verification" \
+            -C "x509_verify_cert() returned" \
+            -C "! The certificate is not correctly signed by the trusted CA" \
+            -C "! mbedtls_ssl_handshake returned" \
+            -C "X509 - Certificate verification failed"
+
 # The purpose of the next two tests is to test the client's behaviour when receiving a server
 # certificate with an unsupported elliptic curve. This should usually not happen because
 # the client informs the server about the supported curves - it does, though, in the
@@ -6383,7 +6395,7 @@
 
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "Authentication, CA callback: client badcert, server required" \
-            "$P_SRV force_version=tls12 ca_callback=1 debug_level=3 auth_mode=required" \
+            "$P_SRV ca_callback=1 debug_level=3 auth_mode=required" \
             "$P_CLI debug_level=3 crt_file=$DATA_FILES_PATH/server5-badsign.crt \
              key_file=$DATA_FILES_PATH/server5.key" \
             1 \
@@ -6398,7 +6410,6 @@
             -s "! The certificate is not correctly signed by the trusted CA" \
             -s "! mbedtls_ssl_handshake returned" \
             -s "send alert level=2 message=48" \
-            -c "! mbedtls_ssl_handshake returned" \
             -s "X509 - Certificate verification failed"
 # We don't check that the client receives the alert because it might
 # detect that its write end of the connection is closed and abort
@@ -6406,7 +6417,7 @@
 
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "Authentication, CA callback: client cert not trusted, server required" \
-            "$P_SRV force_version=tls12 ca_callback=1 debug_level=3 auth_mode=required" \
+            "$P_SRV ca_callback=1 debug_level=3 auth_mode=required" \
             "$P_CLI debug_level=3 crt_file=$DATA_FILES_PATH/server5-selfsigned.crt \
              key_file=$DATA_FILES_PATH/server5.key" \
             1 \
@@ -6420,12 +6431,11 @@
             -s "x509_verify_cert() returned" \
             -s "! The certificate is not correctly signed by the trusted CA" \
             -s "! mbedtls_ssl_handshake returned" \
-            -c "! mbedtls_ssl_handshake returned" \
             -s "X509 - Certificate verification failed"
 
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "Authentication, CA callback: client badcert, server optional" \
-            "$P_SRV force_version=tls12 ca_callback=1 debug_level=3 auth_mode=optional" \
+            "$P_SRV ca_callback=1 debug_level=3 auth_mode=optional" \
             "$P_CLI debug_level=3 crt_file=$DATA_FILES_PATH/server5-badsign.crt \
              key_file=$DATA_FILES_PATH/server5.key" \
             0 \
@@ -6448,7 +6458,7 @@
 run_test    "Authentication, CA callback: server max_int chain, client default" \
             "$P_SRV crt_file=$DATA_FILES_PATH/dir-maxpath/c09.pem \
                     key_file=$DATA_FILES_PATH/dir-maxpath/09.key" \
-            "$P_CLI force_version=tls12 ca_callback=1 debug_level=3 server_name=CA09 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt" \
+            "$P_CLI ca_callback=1 debug_level=3 server_name=CA09 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt" \
             0 \
             -c "use CA callback for X.509 CRT verification" \
             -C "X509 - A fatal error occurred"
@@ -6459,7 +6469,7 @@
 run_test    "Authentication, CA callback: server max_int+1 chain, client default" \
             "$P_SRV crt_file=$DATA_FILES_PATH/dir-maxpath/c10.pem \
                     key_file=$DATA_FILES_PATH/dir-maxpath/10.key" \
-            "$P_CLI force_version=tls12 debug_level=3 ca_callback=1 server_name=CA10 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt" \
+            "$P_CLI debug_level=3 ca_callback=1 server_name=CA10 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt" \
             1 \
             -c "use CA callback for X.509 CRT verification" \
             -c "X509 - A fatal error occurred"
@@ -6470,7 +6480,7 @@
 run_test    "Authentication, CA callback: server max_int+1 chain, client optional" \
             "$P_SRV crt_file=$DATA_FILES_PATH/dir-maxpath/c10.pem \
                     key_file=$DATA_FILES_PATH/dir-maxpath/10.key" \
-            "$P_CLI force_version=tls12 ca_callback=1 server_name=CA10 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt \
+            "$P_CLI ca_callback=1 server_name=CA10 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt \
                     debug_level=3 auth_mode=optional" \
             1 \
             -c "use CA callback for X.509 CRT verification" \
@@ -6480,7 +6490,7 @@
 requires_full_size_output_buffer
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "Authentication, CA callback: client max_int+1 chain, server optional" \
-            "$P_SRV force_version=tls12 ca_callback=1 debug_level=3 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt auth_mode=optional" \
+            "$P_SRV ca_callback=1 debug_level=3 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt auth_mode=optional" \
             "$P_CLI crt_file=$DATA_FILES_PATH/dir-maxpath/c10.pem \
                     key_file=$DATA_FILES_PATH/dir-maxpath/10.key" \
             1 \
@@ -6491,7 +6501,7 @@
 requires_full_size_output_buffer
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "Authentication, CA callback: client max_int+1 chain, server required" \
-            "$P_SRV force_version=tls12 ca_callback=1 debug_level=3 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt auth_mode=required" \
+            "$P_SRV ca_callback=1 debug_level=3 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt auth_mode=required" \
             "$P_CLI crt_file=$DATA_FILES_PATH/dir-maxpath/c10.pem \
                     key_file=$DATA_FILES_PATH/dir-maxpath/10.key" \
             1 \
@@ -6502,7 +6512,7 @@
 requires_full_size_output_buffer
 requires_config_enabled MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 run_test    "Authentication, CA callback: client max_int chain, server required" \
-            "$P_SRV force_version=tls12 ca_callback=1 debug_level=3 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt auth_mode=required" \
+            "$P_SRV ca_callback=1 debug_level=3 ca_file=$DATA_FILES_PATH/dir-maxpath/00.crt auth_mode=required" \
             "$P_CLI crt_file=$DATA_FILES_PATH/dir-maxpath/c09.pem \
                     key_file=$DATA_FILES_PATH/dir-maxpath/09.key" \
             0 \