diff --git a/parquet/src/file/writer.rs b/parquet/src/file/writer.rs
index 4203e36780d2..3eb2f8882708 100644
--- a/parquet/src/file/writer.rs
+++ b/parquet/src/file/writer.rs
@@ -2055,6 +2055,7 @@ mod tests {
     }
 
     struct TestMetadata {
+        #[allow(dead_code)]
         file_size: usize,
         metadata: ParquetMetaData,
     }