Hey,@Nikitha,
Suppose you have multiple files say test_sample1.py, test_sample2.py. To run all the tests from all the files in the folder and subfolders we need to just run the pytest command.
py.test
This will run all the filenames starting with test_ and the filenames ending with _test in that folder and subfolders under that folder. To run tests only from a specific file, we can use py.test <filename>
py.test test_sample3.py
I hope this will help you.