1 files changed, 7 insertions, 4 deletions
diff --git a/tox.ini b/tox.ini
index 543b232ae7..09b4b8fc3c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = packaging, py27, py36, pep8, check_isort
+envlist = packaging, py35, py36, py37, check_codestyle, check_isort
 
 [base]
 deps =
@@ -79,7 +79,7 @@ usedevelop=true
 
 # A test suite for the oldest supported versions of Python libraries, to catch
 # any uses of APIs not available in them.
-[testenv:py27-old]
+[testenv:py35-old]
 skip_install=True
 deps =
     # Old automat version for Twisted
@@ -112,12 +112,15 @@ deps =
 commands =
     check-manifest
 
-[testenv:pep8]
+[testenv:check_codestyle]
 skip_install = True
 basepython = python3.6
 deps =
     flake8
-commands = /bin/sh -c "flake8 synapse tests scripts scripts-dev scripts/hash_password scripts/register_new_matrix_user scripts/synapse_port_db synctl {env:PEP8SUFFIX:}"
+    black
+commands =
+    python -m black --check --diff .
+    /bin/sh -c "flake8 synapse tests scripts scripts-dev scripts/hash_password scripts/register_new_matrix_user scripts/synapse_port_db synctl {env:PEP8SUFFIX:}"
 
 [testenv:check_isort]
 skip_install = True