diff --git a/rustfs/src/app/object_usecase.rs b/rustfs/src/app/object_usecase.rs
index 65f37d216..a8b3e0819 100644
--- a/rustfs/src/app/object_usecase.rs
+++ b/rustfs/src/app/object_usecase.rs
@@ -4795,6 +4795,23 @@ mod tests {
         assert_eq!(err.code(), &S3ErrorCode::InvalidArgument);
     }
 
+    #[tokio::test]
+    async fn execute_get_object_rejects_range_with_part_number() {
+        let input = GetObjectInput::builder()
+            .bucket("test-bucket".to_string())
+            .key("test-key".to_string())
+            .part_number(Some(1))
+            .range(Some(Range::Int { first: 0, last: Some(1) }))
+            .build()
+            .unwrap();
+
+        let req = build_request(input, Method::GET);
+        let usecase = DefaultObjectUsecase::without_context();
+
+        let err = Box::pin(usecase.execute_get_object(req)).await.unwrap_err();
+        assert_eq!(err.code(), &S3ErrorCode::InvalidArgument);
+    }
+
     #[tokio::test]
     async fn execute_copy_object_rejects_self_copy_without_replace_directive() {
         let input = CopyObjectInput::builder()