Rerunning Tests
You can repeat your test session, or individual tests without leaving your test runner tab of the Run tool window. The tests are performed again using the same run configuration as in the initial run.
Rerunning a testing session
Do one of the following:
Press Ctrl+F5 or click
on the toolbar of the Test Runner tab.
Note that you can rerun the tests automatically.
Rerunning an individual test
In the Test Runner tab, click a test case node or a test and select on its context menu.
Rerunning failed tests
In the Test Runner tab, click
on the toolbar.
Rerunning tests automatically
PyCharm lets you rerun run/debug configuration of a test automatically, if the source code has been changed. To enable autotest-like runner facility, make sure that the Toggle auto-test button 
in the Run toolbar of the Test Runner tab is pressed.
Press the Toggle auto-test button
on the Run toolbar of the Test Runner tab. For Mocha and Jest, add the
--watchflag in the Extra Mocha options/Extra Jest options field of the Run/Debug Configuration: Mocha or Run/Debug Configuration: Jest dialog respectively.
Debugging a failed test
In the Test Runner tab, press Shift and click Rerun Failed Tests
. Select Debug from the Restart Failed Tests popup.
The tests that have failed will be rerun in the debug mode.