# Turso Testing ## Testing Extensions When adding tests for extensions, please follow these guidelines: * Tests that verify the internal logic or behavior of a particular extension should go into `cli_tests/extensions.py`. * Tests that verify how extensions interact with the database engine, such as virtual table handling, should be written in TCL (see `vtab.test` as an example). To check which extensions are available in TCL, or to add a new one, refer to the `tester.tcl` file and look at the `extension_map`.