1 files changed, 5 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index d47beac2..4d4ac20c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,11 @@ deps =
     pytest
     ./vectors
 commands =
-    coverage run -m pytest --capture=no --strict {posargs}
+    # We use parallel mode and then combine here so that coverage.py will take
+    # the paths like .tox/py34/lib/python3.4/site-packages/cryptography/__init__.py
+    # and collapse them into src/cryptography/__init__.py.
+    coverage run --parallel-mode -m pytest --capture=no --strict {posargs}
+    coverage combine
     coverage report -m
 
 [testenv:docs]