The purpose of the study is to understand the influence on the construction knowledge test, mastery of teaching materials and attitude Sociological Subject to the quality of an objective test developed by vocational school teachers in Indonesia. This quantitative approach with survey methods was used to undertake the research. Data were analyzed by using regression techniques to test the hypothesis. The study involved 65 of Sociology teachers in Public and Private vocational schools. Test and non-test techniques were used to collect the data. The results of this study indicate that: (1) Test construction knowledge has a positive effect on the quality of objective tests made by the teacher; (2) The Sociology teaching materials have a positive effect on the quality of the objective artificial test; (3) Attitudes towards the sociology lesson show a positive influence; (4) Knowledge of test construction has a positive effect on attitude on sociology lesson; and (5) Mastery of sociological teaching materials has a positive effect on attitudes towards sociology lesson. Thus, it is expected that all teachers should try to develop their teaching competency in various ways to achieve the results consistent with best practice.