diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 75dc71c03..febb0ba1c 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -121,7 +121,7 @@ jobs:
           fetch-depth: 0
       - name: Build package
         run: pyproject-build -s -w . -o dist
-      - name: Publish to PyPi
+      - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@master
         with:
           skip_existing: true
diff --git a/docs/installation.rst b/docs/installation.rst
index ae3e76164..a0e9d2504 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -31,7 +31,7 @@ wheel
 ~~~~~
 Installing tox via a wheel (default with pip) requires an installer that can understand the ``python-requires`` tag (see
 `PEP-503 <https://www.python.org/dev/peps/pep-0503/>`_), with pip this is version ``9.0.0`` (released in November 2016).
-Furthermore, in case you're not installing it via PyPi you need to use a mirror that correctly forwards the
+Furthermore, in case you're not installing it via PyPI you need to use a mirror that correctly forwards the
 ``python-requires`` tag (notably the OpenStack mirrors don't do this, or older `devpi <https://github.com/devpi/devpi>`_
 versions - added with version ``4.7.0``).
 
diff --git a/docs/plugins.rst b/docs/plugins.rst
index 8b0693f67..b28f6745d 100644
--- a/docs/plugins.rst
+++ b/docs/plugins.rst
@@ -22,7 +22,7 @@ under the ``tox-dev`` org organization. We are happy to adopt tox plugins under
 
 - we determine it's trying to solve a valid use case and it's not malicious (e.g. no plugin that deletes the users home
   directory),
-- it's released on PyPi with at least 100 downloads per month (to ensure it's a plugin used by people).
+- it's released on PyPI with at least 100 downloads per month (to ensure it's a plugin used by people).
 
 What's in for you in this:
 
diff --git a/src/tox/pytest.py b/src/tox/pytest.py
index afea6beec..265292bec 100644
--- a/src/tox/pytest.py
+++ b/src/tox/pytest.py
@@ -367,7 +367,7 @@ def matches(pattern: str, text: str, flags: int = 0) -> None:
         except ImportError:  # pragma: no cover # hard to test
             match = re.match(pattern, text, flags)
             if match is None:
-                warnings.warn("install the re-assert PyPi package for bette error message", UserWarning)
+                warnings.warn("install the re-assert PyPI package for bette error message", UserWarning)
             assert match
         else:
             assert Matches(pattern, flags=flags) == text