diff --git a/tests/io_scenario_hdd.cfg b/tests/io_scenario_hdd.cfg
index 0c36324..46210b7 100644
--- a/tests/io_scenario_hdd.cfg
+++ b/tests/io_scenario_hdd.cfg
@@ -16,7 +16,7 @@
 # check different thread count, sync mode. (latency, iops) = func(th_count)
 # ---------------------------------------------------------------------
 [hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
-blocksize={% 4k %}
+blocksize=4k
 rw=randwrite
 sync=1
 numjobs={% 1, 5, 10, 15, 20, 30, 40, 80, 120 %}
@@ -26,7 +26,7 @@
 # also check iops for randread
 # ---------------------------------------------------------------------
 [hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
-blocksize={% 4k %}
+blocksize=4k
 rw=randread
 direct=1
 numjobs={% 1, 5, 10, 15, 20, 30, 40, 80, 120 %}
@@ -36,7 +36,7 @@
 # also check BW for seq read/write.
 # ---------------------------------------------------------------------
 [hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
-blocksize={% 1m %}
+blocksize=1m
 rw={% read, write %}
 direct=1
 numjobs={% 1, 5, 10, 15, 20, 30, 40, 80, 120 %}
@@ -48,4 +48,3 @@
 blocksize=4k
 rw=randwrite
 direct=1
-