diff --git a/tox.ini b/tox.ini
index b2182ffe..f9868cec 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
          OS_STDOUT_NOCAPTURE=False
          OS_STDERR_NOCAPTURE=False
-	 PYTHONHASHSEED=0
+         PYTHONHASHSEED=0
 
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt