diff --git a/tox.ini b/tox.ini
index a7476d12..5466077e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -38,9 +38,9 @@ use_develop = False
 deps =
 	ipython
 commands =
-  python -m 'print("Simple discovery performance")'
+	python -c 'print("Simple discovery performance")'
 	python -m timeit -s 'import importlib_metadata' -- 'importlib_metadata.distribution("ipython")'
-  python -m 'print("Entry point discovery performance")'
+	python -c 'print("Entry point discovery performance")'
 	python -m timeit -s 'import importlib_metadata' -- 'importlib_metadata.entry_points()'
 	python -c 'print("Cached lookup performance")'
 	python -m timeit -s 'import importlib_metadata; importlib_metadata.distribution("ipython")' -- 'importlib_metadata.distribution("ipython")'