diff --git a/Makefile b/Makefile
index 1989d372..601d7153 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ init:
 test:
 	# This runs all of the tests. To run an individual test, run py.test with
 	# the -k flag, like "py.test -k test_path_is_not_double_encoded"
-	py.test tests
+	py.test tests -n 8 --boxed
 
 test-readme:
 	python setup.py check -r -s