diff --git a/stile/sys_tests.py b/stile/sys_tests.py
index 119eb0d..5c1f3b4 100644
--- a/stile/sys_tests.py
+++ b/stile/sys_tests.py
@@ -591,6 +591,7 @@ def plot(self, data, colors=['r', 'b'], log_yscale=False,
             ax.set_ylabel(pd.y_title)
             ax.legend()
         ax.set_xlabel(r)
+        plt.tight_layout()
         return fig
 
     def __call__(self, *args, **kwargs):