diff --git a/tests/scripts/docs_check_outputs.sh b/tests/scripts/docs_check_outputs.sh
index 735f7cd..28426f4 100644
--- a/tests/scripts/docs_check_outputs.sh
+++ b/tests/scripts/docs_check_outputs.sh
@@ -1,23 +1,25 @@
-files=(
-    "test_outputs/docs_image/VTK_tracerTransport/tracerTransport_120.vtk"
-    "test_outputs/docs_device/VTK_tracerTransport/tracerTransport_120.vtk"
-)
+files="
+test_outputs/docs_image/VTK_tracerTransport/tracerTransport_120.vtk
+test_outputs/docs_device/VTK_tracerTransport/tracerTransport_120.vtk
+"
 
 missing_file="test_outputs/missing_docs_files.txt"
 missing=0
 
 rm -f "$missing_file"
 
-for f in "${files[@]}"; do
-    if [[ ! -f "$f" ]]; then
+for f in $files; do
+    if [ ! -f "$f" ]; then
         echo "$f" >> "$missing_file"
-        ((missing++))
+        missing=$((missing + 1))
     fi
 done
 
-if (( missing == 0 )); then
+if [ "$missing" -eq 0 ]; then
     echo "All figures and files exist."
+    return 0
 else
     echo "$missing figure(s) or file(s) missing."
     echo "See $missing_file"
+    return 1
 fi