diff --git a/tox.ini b/tox.ini
index be0d7ee301c..f0cfaa460fb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -85,6 +85,9 @@ commands =
 changedir = doc/en
 basepython = python3
 passenv = SETUPTOOLS_SCM_PRETEND_VERSION
+# TODO: When setuptools-scm 5.0.0 is released, use SETUPTOOLS_SCM_PRETEND_VERSION_FOR_PYTEST
+# and remove the next line.
+install_command=python -m pip --use-deprecated=legacy-resolver install {opts} {packages}
 deps =
     dataclasses
     PyYAML