diff --git a/coverage.sh b/coverage.sh
deleted file mode 100755
index 8801f3fd..00000000
--- a/coverage.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-args=
-if [ -n "$@" ] ; then
-    args="-t $@"
-fi
-python setup.py testr --coverage --slowest "$args"
-python -m coverage report --show-missing
-echo "Coverage generated, see cover/index.html"
diff --git a/tox.ini b/tox.ini
index 3ded1314..7375672a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -46,7 +46,8 @@ commands =
 commands = {posargs}
 
 [testenv:cover]
-commands = ./coverage.sh {posargs}
+commands = python setup.py testr --coverage --testr-args='{posargs}'
+           coverage report --show-missing
 
 [flake8]
 # E123, E125 skipped as they are invalid PEP-8.