-The test suites under **testing.implementation.all** are by design
-intended to run on *either* CircuitPython *or* Micropython+compatibility layer to prove conformance.
+The test suites in the test/src folder under **testing.universal** are by design
+intended to run on *either* CircuitPython *or* Micropython+compatibility layer to prove conformance.
+
+Installing from PyPI
+=====================
+
+On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
+PyPI <https://pypi.org/project/Adafruit-Blinka/>`_. To install for current user:
+
+.. code-block:: shell
+
+ pip3 install Adafruit-Blinka
+
+To install system-wide (this may be required in some cases):