diff --git a/TestGrid.md b/TestGrid.md
index 3abe8c8..f203e87 100644
--- a/TestGrid.md
+++ b/TestGrid.md
@@ -37,8 +37,8 @@ Usage statistics are available for the public test grid. (Note: ticket #13 menti
 This counts the total size of all immutable files reachable through the
 shared public directory listed above.
 
- * [other time scales](http://allmydata.org/tahoe-munin/tahoecs2.allmydata.com-tahoe-rootdir-space.html)
-![](http://allmydata.org/tahoe-munin/tahoecs2.allmydata.com-tahoe-rootdir-space-week.png)
+ * [other time scales](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_rootdir_space.html)
+![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_rootdir_space-week.png)