diff --git a/cmd/zed/zed.d/all-syslog.sh b/cmd/zed/zed.d/all-syslog.sh
index 270b1bc67e5c..b07cf0f295ad 100755
--- a/cmd/zed/zed.d/all-syslog.sh
+++ b/cmd/zed/zed.d/all-syslog.sh
@@ -42,6 +42,7 @@ fi
     msg="${msg} delay=$((ZEVENT_ZIO_DELAY / 1000000))ms"
 
 # list the bookmark data together
+# shellcheck disable=SC2153
 [ -n "${ZEVENT_ZIO_OBJSET}" ] && \
     msg="${msg} bookmark=${ZEVENT_ZIO_OBJSET}:${ZEVENT_ZIO_OBJECT}:${ZEVENT_ZIO_LEVEL}:${ZEVENT_ZIO_BLKID}"
 
diff --git a/scripts/make_gitrev.sh b/scripts/make_gitrev.sh
index da21455332ab..e7f4ce8844d5 100755
--- a/scripts/make_gitrev.sh
+++ b/scripts/make_gitrev.sh
@@ -50,7 +50,7 @@ esac
 ZFS_GITREV=$({ cd "${top_srcdir}" &&
 	git describe --always --long --dirty 2>/dev/null; } || :)
 
-if [ "x${ZFS_GITREV}" = x ]
+if [ -z "${ZFS_GITREV}" ]
 then
 	# If the source directory is not a git repository, check if the file
 	# already exists (in the source)
diff --git a/scripts/man-dates.sh b/scripts/man-dates.sh
index 186d94639a56..39f1b5fb1324 100755
--- a/scripts/man-dates.sh
+++ b/scripts/man-dates.sh
@@ -7,6 +7,6 @@ set -eu
 
 find man -type f | while read -r i ; do
     git_date=$(git log -1 --date=short --format="%ad" -- "$i")
-    [ "x$git_date" = "x" ] && continue
+    [ -z "$git_date" ] && continue
     sed -i "s|^\.Dd.*|.Dd $(date -d "$git_date" "+%B %-d, %Y")|" "$i"
 done