diff --git a/tox.ini b/tox.ini
index 1302c4963..50130ca0e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,8 +19,8 @@ commands =
     # We use parallel mode and then combine later so that coverage.py will take
     # paths like .tox/py36/lib/python3.6/site-packages/fontTools and collapse
     # them into Lib/fontTools.
-    cov: coverage run --parallel-mode -m pytest {posargs:--pyargs fontTools}
-    nocov: pytest {posargs:--pyargs fontTools}
+    cov: coverage run --parallel-mode -m pytest {posargs}
+    nocov: pytest {posargs}
 
 [testenv:htmlcov]
 basepython = {env:TOXPYTHON:python3.5}
@@ -29,7 +29,7 @@ deps =
 skip_install = true
 commands =
     coverage combine
-    coverage html
+    coverage html {posargs}
 
 [testenv:codecov]
 passenv = *