The study analyses the assessment instruments designed by Chilean English as a Foreign Language (EFL) in-service teachers. The participants were 110 secondary school teachers from the central, northern, and southern areas of Chile. The data collection technique was document analysis of the assessment instruments designed in their teaching practices. The results suggest that the most typical instrument is a language test, while speaking/writing performance evaluations with rubrics and rating scales are used to a lesser degree, and all having writing, reading, grammar, and vocabulary as their primary assessment foci. It is suggested that universities and administrators of educational institutions promote opportunities for professional updating regarding language assessment. Moreover, pre-service teacher education needs to emphasize and strengthen this didactic dimension.