Schoology encourages instructors to utilize Assessments as we continuously add more features. In the meantime, Test/Quiz materials will continue to be available alongside Assessments.
While the long-term plan for Schoology is to expand Assessments and eventually phase out the Test/Quiz feature, we want to ensure a seamless transition for everyone using the original testing feature.
One of the key features that will help the transition will be a tool to convert Test/Quizzes into Assessments. You can follow the progress of this feature on our Product Roadmap.