diff --git a/tox.ini b/tox.ini
index 485f85693..8d1712b03 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,7 +30,12 @@ deps =
     pytest2: pytest>=2.9,<3.0
     pytest3: pytest>=3.0,<4.0
 setenv =
-     PYTHONPATH = {toxinidir}:{env:PYTHONPATH:}
+    PYTHONPATH = {toxinidir}:{env:PYTHONPATH:}
+
+    # Ref: https://github.com/pytest-dev/pytest-django/pull/412#issuecomment-340077539
+    COV_CORE_SOURCE={toxinidir}
+    COV_CORE_CONFIG={toxinidir}/.coveragerc
+    COV_CORE_DATAFILE={toxinidir}/.coverage.eager
 
 passenv = PYTEST_ADDOPTS
 usedevelop = True