diff --git a/tox.ini b/tox.ini
index 338607e..277c262 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,32 +1,28 @@
 [tox]
-envlist=check-manifest,flake8,mypy,py3
+envlist=flake8,mypy,py3
 
 [testenv]
 extras =
   testing
 deps =
   pytest-cov
 commands =
-  pytest --cov=swh --cov-branch {posargs}
+  pytest --doctest-modules \
+         {envsitepackagesdir}/swh/foo \
+         --cov={envsitepackagesdir}/swh/foo \
+         --cov-branch {posargs}
 
 [testenv:flake8]
 skip_install = true
 deps =
   flake8
 commands =
   {envpython} -m flake8
 
-[testenv:check-manifest]
-skip_install = true
-deps =
-  check-manifest
-commands =
-  {envpython} -m check_manifest {toxinidir}
-
 [testenv:mypy]
 extras =
   testing
 deps =
   mypy
 commands =
   mypy swh