diff --git a/requirements/test.txt b/requirements/test.txt
index 6bf3d561..f466d043 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -1,4 +1,4 @@
 case>=1.3.1
 pytest<6
 # psutil is pinned since this is the last version that supports pypy2
-psutil==5.6.3
+psutil==5.6.6