diff --git a/tox.ini b/tox.ini
index 764b4030..8946ace9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,6 @@
 [tox]
 envlist = {py26,py27,pypy}-{lowest,release,devel}{,-simplejson}, {py33,py34,py35,py36}-{release,devel}{,-simplejson}
 
-
-
 [testenv]
 passenv = LANG
 usedevelop=true
@@ -20,12 +18,18 @@ deps=
     lowest: Werkzeug==0.7
     lowest: Jinja2==2.4
     lowest: itsdangerous==0.21
+    lowest: Click==4.0
     lowest: blinker==1.0
+
     release: blinker
+
     devel: git+https://github.com/pallets/werkzeug.git
+    devel: git+https://github.com/pallets/markupsafe.git
     devel: git+https://github.com/pallets/jinja.git
     devel: git+https://github.com/pallets/itsdangerous.git
+    devel: git+https://github.com/pallets/click.git
     devel: git+https://github.com/jek/blinker.git
+
     simplejson: simplejson
 
 [testenv:docs]