Merge branch 'master' into formatter-docs

2 files changed, 8 insertions, 1 deletions

diff --git a/docs/contributing.rst b/docs/contributing.rst
index 46ee6d6..ad2914f 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -77,8 +77,12 @@ We use pytest_ for testing. If you contribute code you need to add tests:
 - When using classes, derive from `QuantityTestCase`.
 - Use `parametrize` as much as possible.
 - Use `fixtures` (see conftest.py) instead of instantiating the registry yourself.
-- Checkout `helpers.py` for some convenience functions before reinventing the wheel.
+  Check out the existing fixtures before creating your own.
 - When your test does not modify the registry, use `sess_registry` fixture.
+- **Do not** create a unit registry outside a test or fixture setup.
+- If you need a specific registry, and you need to reuse it create a
+  fixture in your test module called `local_registry` or similar.
+- Checkout `helpers.py` for some convenience functions before reinventing the wheel.
 
 
 Running tests and building documentation
diff --git a/docs/developers_reference.rst b/docs/developers_reference.rst
index f2be046..02f114e 100644
--- a/docs/developers_reference.rst
+++ b/docs/developers_reference.rst
@@ -50,6 +50,9 @@ All Modules
 .. automodule:: pint.systems
     :members:
 
+.. automodule:: pint.testing
+    :members:
+
 .. automodule:: pint.unit
     :members: