diff --git a/tests/requirements.txt b/tests/requirements.txt
index 9ed07645..0e9a0f0a 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,5 +1,6 @@
 psutil==5.4.8
-coverage==4.5.1
+coverage==5.5;      python_version < '3.7'
+coverage==6.4.4;    python_version >= '3.7'
 Django==1.6.11  # Last version supporting 2.6.
 faulthandler==3.2; python_version < '3.3'
 mock==2.0.0