diff --git a/tox.ini b/tox.ini
index 01cc83d..07aa2a4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ commands = cp {toxinidir}/run_test.py .
            ln -sf {toxinidir}/test
            {envpython} run_test.py
 
-		   coverage erase
-		   coverage run -m unittest discover
-		   coverage report
-		   coverage html
+           coverage erase
+           coverage run -m unittest discover
+           coverage report
+           coverage html