Not all classes require WST. Usually, only the classes for senior require WST. In most cases, class number > 150 and advance GE classes have WST as pre-req. You can go online to check the test schedule and WST info https://testing.sjsu.edu/WSTBulletin102607.pdf. Please make sure you are eligible to enroll in the advance GE classes. And be noted, Open University student has the lowest priority in registering/adding classes.