diff --git a/.travis.yml b/.travis.yml
index 7b331719..17529ff8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,8 @@ matrix:
     - env: TOXENV=py36-dev
     - env: TOXENV=py37
 install: pip install tox
-script: tox
+# TODO: https://github.com/tox-dev/tox/issues/149
+script: tox --recreate
 cache:
   directories:
     - .tox
diff --git a/requirements_test.txt b/requirements_test.txt
index ba9f66e5..a99b558b 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,2 +1,3 @@
+coverage>=4.0,<4.4  # TODO: https://github.com/benoitc/gunicorn/issues/1548
 pytest==3.0.5
 pytest-cov==2.4.0