diff --git a/datafusion/core/src/datasource/file_format/parquet.rs b/datafusion/core/src/datasource/file_format/parquet.rs
index 3250b59fa1d1..b50e9389ad9e 100644
--- a/datafusion/core/src/datasource/file_format/parquet.rs
+++ b/datafusion/core/src/datasource/file_format/parquet.rs
@@ -1321,7 +1321,7 @@ mod tests {
             .map(|i| i.to_string())
             .collect();
         let coll: Vec<_> = schema
-            .all_fields()
+            .flattened_fields()
             .into_iter()
             .map(|i| i.name().to_string())
             .collect();