diff --git a/test-case/check-suspend-resume.sh b/test-case/check-suspend-resume.sh
index f0c1409e..edce695f 100755
--- a/test-case/check-suspend-resume.sh
+++ b/test-case/check-suspend-resume.sh
@@ -19,7 +19,8 @@ set -e
 ##    check kernel log and find no errors
 ##
 
-source $(dirname ${BASH_SOURCE[0]})/../case-lib/lib.sh
+# shellcheck source=case-lib/lib.sh
+source "$(dirname "${BASH_SOURCE[0]}")"/../case-lib/lib.sh
 
 random_min=3    # wait time should >= 3 for other device wakeup from sleep
 random_max=20
@@ -46,9 +47,12 @@ type=${OPT_VAL['T']}
 # switch type
 if [ "$type" ]; then
     # check for type value effect
-    [[ ! "$(cat /sys/power/mem_sleep|grep $type)" ]] && dloge "useless type option" && exit 2
-    dlogc "sudo bash -c 'echo $type > /sys/power/mem_sleep'"
-    sudo bash -c "'echo $type > /sys/power/mem_sleep'"
+    grep -q "$type" /sys/power/mem_sleep || {
+        grep -H '^' /sys/power/mem_sleep
+        die "Unsupported sleep type argument: $type"
+    }
+    dlogc "echo $type > /sys/power/mem_sleep"
+    echo "$type" | >/dev/null sudo tee -a /sys/power/mem_sleep
 fi
 dlogi "Current suspend/resume type mode: $(cat /sys/power/mem_sleep)"
 
@@ -82,8 +86,8 @@ do
     setup_kernel_check_point
     sleep_count=$(cat /sys/power/wakeup_count)
     dlogc "Run the command: rtcwake -m mem -s ${sleep_lst[$i]}"
-    sudo rtcwake -m mem -s ${sleep_lst[$i]}
-    [[ $? -ne 0 ]] && die "rtcwake return value error"
+    sudo rtcwake -m mem -s "${sleep_lst[$i]}" ||
+        die "rtcwake returned $?"
     dlogc "sleep for ${wait_lst[$i]}"
     sleep ${wait_lst[$i]}
     dlogi "Check for the kernel log status"