diff --git a/renderer/_example.sh b/renderer/_example.sh
index d54e224..08e5c68 100755
--- a/renderer/_example.sh
+++ b/renderer/_example.sh
@@ -19,7 +19,7 @@ else
   touch "${LOCKFILE}"
 
   # Ensure the lock file is removed when we exit and when we receive signals
-  trap "rm -f '${LOCKFILE}'; trap - SIGTERM && kill -- -'$$'" SIGINT SIGTERM EXIT
+  trap 'rm -f ${LOCKFILE}; trap - SIGTERM && kill -- -$$' SIGINT SIGTERM EXIT
 fi
 
 # The local path to the tileservice repo
diff --git a/renderer/render_seashells.sh b/renderer/render_seashells.sh
index 054b5d9..b42e808 100755
--- a/renderer/render_seashells.sh
+++ b/renderer/render_seashells.sh
@@ -33,10 +33,9 @@ PLANET="$WORKING_DIR/data/planet.pmtiles"
 run() {
   TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
   START_TIME=$(date +%s)
-  "$DIR/render_once.sh" "$WORKING_DIR"
 
-  # Check the exit status of render_once.sh
-  if [ $? -eq 0 ]; then
+  if "$DIR/render_once.sh" "$WORKING_DIR"
+  then
     # Record the end time
     END_TIME=$(date +%s)