diff --git a/wally/suits/io/check_linearity.cfg b/wally/suits/io/check_linearity.cfg
index 42618d4..04d5f97 100644
--- a/wally/suits/io/check_linearity.cfg
+++ b/wally/suits/io/check_linearity.cfg
@@ -1,6 +1,5 @@
 [global]
-include defaults.cfg
-
+include defaults_qd.cfg
 direct=1
 ramp_time=5
 runtime=30
@@ -12,6 +11,7 @@
 [linearity_test_{TEST_SUMM}]
 blocksize={BLOCK_SIZES}
 rw=randread
+iodepth=4
 
 # ---------------------------------------------------------------------
 # check sync write linearity. oper_time = func(size)
@@ -21,4 +21,3 @@
 blocksize={BLOCK_SIZES}
 rw=randwrite
 sync=1
-