diff --git a/crates/ndc-sqlserver/tests/mutation_tests.rs b/crates/ndc-sqlserver/tests/mutation_tests.rs
index 41ebd8a..e003442 100644
--- a/crates/ndc-sqlserver/tests/mutation_tests.rs
+++ b/crates/ndc-sqlserver/tests/mutation_tests.rs
@@ -64,7 +64,8 @@ mod native_mutations {
             let _ = run_mutation_fail(
                 "fail_insert_artist_and_return_id",
                 fresh_deployment.connection_uri.clone(),
-                StatusCode::INTERNAL_SERVER_ERROR,
+
+                StatusCode::UNPROCESSABLE_ENTITY,
             )
             .await;
 
diff --git a/crates/ndc-sqlserver/tests/snapshots/mutation_tests__stored_procedures__execute_stored_procedure_without_providing_arguments.snap b/crates/ndc-sqlserver/tests/snapshots/mutation_tests__stored_procedures__execute_stored_procedure_without_providing_arguments.snap
index 8aefe86..46513af 100644
--- a/crates/ndc-sqlserver/tests/snapshots/mutation_tests__stored_procedures__execute_stored_procedure_without_providing_arguments.snap
+++ b/crates/ndc-sqlserver/tests/snapshots/mutation_tests__stored_procedures__execute_stored_procedure_without_providing_arguments.snap
@@ -3,8 +3,6 @@ source: crates/ndc-sqlserver/tests/mutation_tests.rs
 expression: result
 ---
 {
-  "message": "Invalid request",
-  "details": {
-    "detail": "Argument 'CustomerId' not found."
-  }
+  "message": "Argument 'CustomerId' not found.",
+  "details": null
 }