diff --git a/changelog/638.bugfix.rst b/changelog/638.bugfix.rst
new file mode 100644
index 0000000..7fb978c
--- /dev/null
+++ b/changelog/638.bugfix.rst
@@ -0,0 +1 @@
+Fix issue caused by changing the branch name of the pytest repository.
diff --git a/tox.ini b/tox.ini
index dfa7860..9dc2b84 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ envlist=
 extras = testing
 deps =
   pytestlatest: pytest
-  pytestmaster: git+https://github.com/pytest-dev/pytest.git@master
+  pytestmaster: git+https://github.com/pytest-dev/pytest.git@main
 commands=
   pytest {posargs}