diff --git a/tox.ini b/tox.ini
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist=check-manifest,flake8,mypy,py3
+envlist=flake8,mypy,py3
 
 [testenv]
 extras =
@@ -7,7 +7,10 @@
 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
@@ -16,13 +19,6 @@
 commands =
   {envpython} -m flake8
 
-[testenv:check-manifest]
-skip_install = true
-deps =
-  check-manifest
-commands =
-  {envpython} -m check_manifest {toxinidir}
-
 [testenv:mypy]
 extras =
   testing