diff --git a/tests/include/test/drivers/signature.h b/tests/include/test/drivers/signature.h
index 1586ce9..5e64edc 100644
--- a/tests/include/test/drivers/signature.h
+++ b/tests/include/test/drivers/signature.h
@@ -54,6 +54,48 @@
 extern mbedtls_test_driver_signature_hooks_t
     mbedtls_test_driver_signature_verify_hooks;
 
+psa_status_t mbedtls_test_transparent_signature_sign_message(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key,
+    size_t key_length,
+    psa_algorithm_t alg,
+    const uint8_t *input,
+    size_t input_length,
+    uint8_t *signature,
+    size_t signature_size,
+    size_t *signature_length );
+
+psa_status_t mbedtls_test_opaque_signature_sign_message(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key,
+    size_t key_length,
+    psa_algorithm_t alg,
+    const uint8_t *input,
+    size_t input_length,
+    uint8_t *signature,
+    size_t signature_size,
+    size_t *signature_length );
+
+psa_status_t mbedtls_test_transparent_signature_verify_message(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key,
+    size_t key_length,
+    psa_algorithm_t alg,
+    const uint8_t *input,
+    size_t input_length,
+    const uint8_t *signature,
+    size_t signature_length );
+
+psa_status_t mbedtls_test_opaque_signature_verify_message(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key,
+    size_t key_length,
+    psa_algorithm_t alg,
+    const uint8_t *input,
+    size_t input_length,
+    const uint8_t *signature,
+    size_t signature_length );
+
 psa_status_t mbedtls_test_transparent_signature_sign_hash(
     const psa_key_attributes_t *attributes,
     const uint8_t *key, size_t key_length,