1 files changed, 3 insertions, 5 deletions
diff --git a/tox.ini b/tox.ini
index 44371f211f..a0f5486829 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,9 +9,6 @@ deps =
     junitxml
     coverage
 
-    # needed by some of the tests
-    lxml
-
     # cyptography 2.2 requires setuptools >= 18.5
     #
     # older versions of virtualenv (?) give us a virtualenv with the same
@@ -33,6 +30,7 @@ setenv =
 [testenv]
 deps =
     {[base]deps}
+extras = all
 
 whitelist_externals =
     sh
@@ -135,7 +133,7 @@ commands = /bin/sh -c "flake8 synapse tests scripts scripts-dev scripts/hash_pas
 [testenv:check_isort]
 skip_install = True
 deps = isort
-commands = /bin/sh -c "isort -c -sp setup.cfg -rc synapse tests"
+commands = /bin/sh -c "isort -c -df -sp setup.cfg -rc synapse tests"
 
 [testenv:check-newsfragment]
 skip_install = True
@@ -151,4 +149,4 @@ deps =
     codecov
 commands =
     coverage combine
-    codecov -X gcov
\ No newline at end of file
+    codecov -X gcov