diff --git a/datafusion/core/src/datasource/file_format/parquet.rs b/datafusion/core/src/datasource/file_format/parquet.rs
index 7bd2e188a0b0f..dbdf448646623 100644
--- a/datafusion/core/src/datasource/file_format/parquet.rs
+++ b/datafusion/core/src/datasource/file_format/parquet.rs
@@ -576,13 +576,11 @@ pub(crate) mod test_util {
         multi_page: bool,
     ) -> Result<(Vec<ObjectMeta>, Vec<NamedTempFile>)> {
         // Each batch writes to their own file
-        let mut idx = 0;
         let pathbuf = PathBuf::from_str("/tmp/").unwrap();
         let files: Vec<_> = batches
             .into_iter()
             .map(|batch| {
-                idx += 1;
-                let mut output = NamedTempFile::new_in(pathbuf.join(format!("file{idx}"))).expect("creating temp file");
+                let mut output = NamedTempFile::new_in(pathbuf.clone()).expect("creating temp file");
                 
                 let builder = WriterProperties::builder();
                 let props = if multi_page {