diff --git a/requirements-test.txt b/requirements-test.txt
index e079f8a..3d0bbf8 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1 +1 @@
-pytest
+pytest < 7.0.0  # v7.0.0 removed _pytest.tmpdir.TempdirFactory, which is used by some of the pytest plugins we use