diff --git a/wally/suits/io/rrd.cfg b/wally/suits/io/rrd.cfg
index 1075aea..d32d6a8 100644
--- a/wally/suits/io/rrd.cfg
+++ b/wally/suits/io/rrd.cfg
@@ -1,8 +1,14 @@
 [global]
 include defaults_qd.cfg
-ramp_time=5
-runtime=5
+ramp_time=0
+runtime=4
 
 [test_{TEST_SUMM}]
 blocksize=60k
 rw=randread
+iodepth=1
+
+[test_{TEST_SUMM}]
+iodepth=16
+blocksize=60k
+rw=randread