diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 8d15b4f..f3bf495 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -566,6 +566,9 @@
     mbedtls_x509_crt cacert;
     mbedtls_x509_crt clicert;
     mbedtls_pk_context pkey;
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_key_slot_t key_slot = 0; /* invalid key slot */
+#endif
 #endif
     char *p, *q;
     const int *list;
@@ -1327,11 +1330,17 @@
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     if( opt.key_opaque != 0 )
     {
-        /* coming soon: load key to key slot */
+        if( ( ret = mbedtls_pk_wrap_as_opaque( &pkey, &key_slot,
+                                               PSA_ALG_SHA_256 ) ) != 0 )
+        {
+            mbedtls_printf( " failed\n  !  "
+                            "mbedtls_pk_wrap_as_opaque returned -0x%x\n\n", -ret );
+            goto exit;
+        }
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-    mbedtls_printf( " ok\n" );
+    mbedtls_printf( " ok (key type: %s)\n", mbedtls_pk_get_name( &pkey ) );
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
     /*
@@ -2138,6 +2147,9 @@
     mbedtls_x509_crt_free( &clicert );
     mbedtls_x509_crt_free( &cacert );
     mbedtls_pk_free( &pkey );
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_destroy_key( key_slot );
+#endif
 #endif
     mbedtls_ssl_session_free( &saved_session );
     mbedtls_ssl_free( &ssl );
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index ce9aee2..5cded21 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -865,6 +865,21 @@
             -s "Protocol is DTLSv1.2" \
             -s "Ciphersuite is TLS-ECDHE-RSA-WITH-CHACHA20-POLY1305-SHA256"
 
+# Test using an opaque private key for client authentication
+requires_config_enabled MBEDTLS_USE_PSA_CRYPTO
+requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
+requires_config_enabled MBEDTLS_ECDSA_C
+requires_config_enabled MBEDTLS_SHA256_C
+run_test    "Opaque key for client authentication" \
+            "$P_SRV auth_mode=required" \
+            "$P_CLI key_opaque=1 crt_file=data_files/server5.crt \
+             key_file=data_files/server5.key" \
+            0 \
+            -c "key type: Opaque" \
+            -s "Verifying peer X.509 certificate... ok" \
+            -S "error" \
+            -C "error"
+
 # Test current time in ServerHello
 requires_config_enabled MBEDTLS_HAVE_TIME
 run_test    "ServerHello contains gmt_unix_time" \