As it is known formative assessment focuses on both learning process and learner's performance. In this study, digital formative assessment and traditional speaking tests were utilized comparatively to evaluate 52 upper-intermediate EFL learners' English language speaking skills. The study was designed as a mixed-method. The quantitative data were collected via achievement tests which had been administered both in traditional speaking tests and digital formative tests. The qualitative findings were collected with students' interviews which consisted of four open-ended questions. The results of the study showed that participants outperformed in digital formative tests in comparison to traditional speaking tests. Another significant finding of the study is that participants are satisfied with the digital formative assessments in terms of peer collaboration during tests, enriched test materials, and preparation time for the speaking test. Although they have positive views on digital formative assessment, participants are dissatisfied with it in terms of technical problems that they encountered during the administration of digital formative tests.