diff --git a/tox.ini b/tox.ini
index 0c360be4..6534c176 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,35 +1,30 @@
 [tox]
 envlist=flake8,mypy,py3
 
-[testenv:py3]
+[testenv]
 deps =
   .[testing]
   pytest-cov
   pytest-django
 commands =
-  pytest --hypothesis-profile=swh-web-fast --cov {envsitepackagesdir}/swh/web --cov-branch {posargs} {envsitepackagesdir}/swh/web
-
-[testenv:py3-slow]
-deps =
-  .[testing]
-  pytest-cov
-  pytest-django
-commands =
-  pytest --hypothesis-profile=swh-web --cov {envsitepackagesdir}/swh/web --cov-branch {posargs} {envsitepackagesdir}/swh/web
+  pytest \
+    slow:  --hypothesis-profile=swh-web \
+    !slow: --hypothesis-profile=swh-web-fast \
+      --cov {envsitepackagesdir}/swh/web --cov-branch {posargs} {envsitepackagesdir}/swh/web
 
 [testenv:flake8]
 skip_install = true
 deps =
   flake8
 commands =
   {envpython} -m flake8 \
     --exclude=.tox,.git,__pycache__,.eggs,*.egg,node_modules
 
 [testenv:mypy]
 setenv = DJANGO_SETTINGS_MODULE = swh.web.settings.development
 skip_install = true
 deps =
   mypy
   .[testing]
 commands =
   mypy swh