diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 1ebab3e..80943bd 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -1121,6 +1121,33 @@
             -s "Protocol is DTLSv1.2" \
             -s "Ciphersuite is TLS-ECDHE-RSA-WITH-CHACHA20-POLY1305-SHA256"
 
+requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
+requires_config_enabled MBEDTLS_ECDSA_C
+requires_config_enabled MBEDTLS_SHA256_C
+run_test    "TLS: password protected client key" \
+            "$P_SRV auth_mode=required" \
+            "$P_CLI crt_file=data_files/server5.crt key_file=data_files/server5.key.enc key_pwd=PolarSSLTest" \
+            0
+
+requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
+requires_config_enabled MBEDTLS_ECDSA_C
+requires_config_enabled MBEDTLS_SHA256_C
+run_test    "TLS: password protected server key" \
+            "$P_SRV crt_file=data_files/server5.crt key_file=data_files/server5.key.enc key_pwd=PolarSSLTest" \
+            "$P_CLI" \
+            0
+
+requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
+requires_config_enabled MBEDTLS_ECDSA_C
+requires_config_enabled MBEDTLS_RSA_C
+requires_config_enabled MBEDTLS_SHA256_C
+run_test    "TLS: password protected server key, two certificates" \
+            "$P_SRV \
+              key_file=data_files/server5.key.enc key_pwd=PolarSSLTest crt_file=data_files/server5.crt \
+              key_file2=data_files/server2.key.enc key_pwd2=PolarSSLTest crt_file2=data_files/server2.crt" \
+            "$P_CLI" \
+            0
+
 requires_config_enabled MBEDTLS_ZLIB_SUPPORT
 run_test    "Default (compression enabled)" \
             "$P_SRV debug_level=3" \