diff --git a/tox.ini b/tox.ini
index 1b62b98e4..c52a43fd7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,7 @@ envlist =
     pypy3
     py38-{pexpect,xdist,unittestextras,numpy,pluggymain,pylib}
     doctesting
+    doctesting-coverage
     plugins
     py38-freeze
     docs