diff --git a/requirements/requirements-testing.txt b/requirements/requirements-testing.txt
index ad246e857..99463560e 100644
--- a/requirements/requirements-testing.txt
+++ b/requirements/requirements-testing.txt
@@ -2,3 +2,4 @@
 pytest>=5.4.1,<5.5
 pytest-django>=3.9.0,<3.10
 pytest-cov>=2.7.1
+six>=1.14.0