Thank You for contacting Telerik. I hope you don't mind I converted your support ticket into a public forum post so that the rest of our customers can benefit from our response.
From what I understand, you would like to call a test to be used as a step within a separate test.
This can be achieved using the “Test as Step” feature in Test Studio. The feature allows you to reuse common automated steps from one test and insert it into separate test as a test step. The tests should be within the same project.
For a full overview of the Test as Step feature, including step by step instructions, please review the Test as Step
section of our documentation.
the Telerik team