Rerunning tests
You can repeat a test session or individual tests without leaving the Run tool window. The tests are performed again using the same run configuration as in the initial run.
Rerun a testing session
Press Ctrl+F5 or click the Rerun button 
on the toolbar of Test Runner tab.
Note that you can rerun the tests automatically.
Rerun an individual test
In the Test Runner tab, right-click a test case node or a test and select .
Rerun failed tests
In the Test Runner tab, click the Rerun Failed Tests button 
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.
Debug failed tests
Place a breakpoint in the failed test function.
In the Test Runner tab, press Shift and click the Rerun Failed Tests button
. Select Debug from the Restart Failed Tests popup.
The tests that have failed will be rerun in the debug mode.