diff --git a/tests/PhpSpreadsheetTests/Writer/Csv/CsvOutputEncodingTest.php b/tests/PhpSpreadsheetTests/Writer/Csv/CsvOutputEncodingTest.php
index 15140a69..da24be20 100644
--- a/tests/PhpSpreadsheetTests/Writer/Csv/CsvOutputEncodingTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Csv/CsvOutputEncodingTest.php
@@ -2,6 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Writer\Csv;
 
+use PhpOffice\PhpSpreadsheet\Shared\File;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Writer\Csv as CsvWriter;
 use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;