1 files changed, 5 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 8ac2e18..bbd2c6d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,10 @@ envlist = py27, py35, py36, py37, pypy
 [testenv]
 deps =
     pytest
-    pytest-cov
+    # 4.5.2a1 for py37 fix
+    coverage: https://github.com/nedbat/coveragepy/archive/58b210ad8998a9270f4ee6ff0c9054785f579b43.zip
+    coverage: pytest-cov
+setenv =
+    coverage: PYTEST_ADDOPTS=--cov --cov-report=term-missing
 commands =
     py.test {posargs}