@echo off
    setlocal enableextensions disabledelayedexpansion

    set "search=)"     set "replace=test"
    set "textFile=test.txt"

    for /f "delims=" %%i in ('type "%textFile%" ^& break ^> "%textFile%" ') do (
        set "line=%%i"
        setlocal enabledelayedexpansion
        >>"%textFile%" echo(!line:%search%=%replace%!
        endlocal
    )