diff --git a/tests/include/test/drivers/key_management.h b/tests/include/test/drivers/key_management.h
index 16ee0b2..d147568 100644
--- a/tests/include/test/drivers/key_management.h
+++ b/tests/include/test/drivers/key_management.h
@@ -115,7 +115,7 @@
 psa_status_t mbedtls_test_opaque_copy_key(
     psa_key_attributes_t *attributes,
     const uint8_t *source_key,
-    size_t source_key_size,
+    size_t source_key_length,
     uint8_t *target_key_buffer,
     size_t target_key_buffer_size,
     size_t *target_key_buffer_length);