diff --git a/perfmetrics/scripts/job_files/presubmit_perf_test.fio b/perfmetrics/scripts/job_files/presubmit_perf_test.fio
index b4586d8dad..9b4f77906e 100644
--- a/perfmetrics/scripts/job_files/presubmit_perf_test.fio
+++ b/perfmetrics/scripts/job_files/presubmit_perf_test.fio
@@ -34,6 +34,7 @@ directory=gcs/256kb
 filesize=256k
 rw=write
 numjobs=40
+fsync=16
 
 [256kb_randread]
 stonewall
@@ -68,6 +69,7 @@ directory=gcs/50mb
 filesize=50M
 rw=write
 numjobs=40
+fsync=50
 
 [50mb_randread]
 stonewall
@@ -100,6 +102,7 @@ directory=gcs/1gb
 filesize=1G
 rw=write
 numjobs=40
+fsync=1000
 
 [1gb_randread]
 stonewall
diff --git a/perfmetrics/scripts/job_files/seq_rand_read_write.fio b/perfmetrics/scripts/job_files/seq_rand_read_write.fio
index 894c811586..eda23491d8 100644
--- a/perfmetrics/scripts/job_files/seq_rand_read_write.fio
+++ b/perfmetrics/scripts/job_files/seq_rand_read_write.fio
@@ -34,6 +34,7 @@ directory=gcs/256kb
 filesize=256k
 rw=write
 numjobs=40
+fsync=16
 
 [3_thread]
 stonewall
@@ -49,6 +50,7 @@ directory=gcs/3mb
 filesize=3M
 rw=write
 numjobs=40
+fsync=3
 
 [5_thread]
 stonewall
@@ -64,6 +66,7 @@ directory=gcs/5mb
 filesize=5M
 rw=write
 numjobs=40
+fsync=5
 
 [7_thread]
 stonewall
@@ -79,6 +82,7 @@ directory=gcs/50mb
 filesize=50M
 rw=write
 numjobs=40
+fsync=50
 
 [9_thread]
 stonewall