This documentation covers IPython versions 6.0 and higher. Beginning with version 6.0, IPython stopped supporting compatibility with Python versions lower than 3.3 including all versions of Python 2.7.
If you are looking for an IPython version compatible with Python 2.7, please use the IPython 5.x LTS release and refer to its documentation (LTS is the long term support release).
Testing support (tools to test IPython itself).
Run the entire IPython test suite.
Any of the options for run_iptestall() may be passed as keyword arguments.
IPython.test(testgroups=['lib', 'config', 'utils'], fast=2)
will run those three sections of the test suite, using two processes.