scores on english tests中的介词用on还是in

介词是用in，in English tests 为固定搭配，中文意思是英语考试成绩

What is more， because he could not speak very clearly， he had to put much more time preparing for English Speaking tests but still did not get good scores in the tests.最令人揪心的是，因为口齿的原因，每次口语考试都要花许多功夫练习，结果还是拿不了最高分。