ABSTRACT Eskarina, Elma. 2023. “Investigating Validity and Reliability of English Formative Test in Online Learning at SMPN 1 Secang in the academic year 2021/2022â€. An Undergraduate Thesis. English Department. Faculty of Education and Teacher Training, Universitas Tidar. Advisor I, Dr. Sri Sarwanti, S.Pd., M.Hum., Advisor II Gilang Fadhilia Arvianti, S.S., M.Hum. Keywords: Langu…