diff --git a/tox.ini b/tox.ini
index face0d6..870f88c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,33 +1,35 @@
 [tox]
 envlist=flake8,mypy,py3
 
 [testenv:py3]
 deps =
+  swh.core[http]
   .[testing]
   pytest-cov
 commands =
   pytest --cov={envsitepackagesdir}/swh/loader/ --cov-branch \
          {envsitepackagesdir}/swh/loader/ {posargs}
 
 [testenv:py3-dev]
 deps =
+  swh.core[http]
   .[testing]
   pytest-cov
   ipdb
 commands =
   pytest {envsitepackagesdir}/swh/loader/ {posargs}
 
 [testenv:flake8]
 skip_install = true
 deps =
   flake8
 commands =
   {envpython} -m flake8
 
 [testenv:mypy]
 skip_install = true
 deps =
   .[testing]
   mypy
 commands =
   mypy swh