diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 6fde7b6..6838024 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -2071,6 +2071,20 @@
 requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
 requires_config_enabled MBEDTLS_USE_PSA_CRYPTO
 requires_config_enabled MBEDTLS_RSA_C
+run_test    "TLS 1.3 opaque key: first client sig alg not suitable" \
+            "$P_SRV debug_level=4 force_version=tls13 auth_mode=required key_opaque=1 key_opaque_algs=rsa-sign-pss-sha512,none" \
+            "$P_CLI debug_level=4 sig_algs=rsa_pss_rsae_sha256,rsa_pss_rsae_sha512" \
+            0 \
+            -s "The SSL configuration is tls13 only" \
+            -s "key types: Opaque, Opaque" \
+            -s "CertificateVerify signature failed with rsa_pss_rsae_sha256" \
+            -s "CertificateVerify signature with rsa_pss_rsae_sha512" \
+            -C "error" \
+            -S "error" \
+
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
+requires_config_enabled MBEDTLS_USE_PSA_CRYPTO
+requires_config_enabled MBEDTLS_RSA_C
 run_test    "TLS 1.3 opaque key: 2 keys on server, suitable algorithm found" \
             "$P_SRV debug_level=4 force_version=tls13 auth_mode=required key_opaque=1 key_opaque_algs2=ecdsa-sign,none key_opaque_algs=rsa-decrypt,rsa-sign-pss" \
             "$P_CLI debug_level=4 key_opaque=1 key_opaque_algs=rsa-decrypt,rsa-sign-pss" \