diff --git a/testing/validate-interworx.sh b/testing/validate-interworx.sh
index 0e05de4..0dcc35e 100755
--- a/testing/validate-interworx.sh
+++ b/testing/validate-interworx.sh
@@ -509,7 +509,7 @@ if [ -n "$FIRST_WP" ]; then
                 crontab -u "$WP_USER" -l 2>/dev/null | head -10 >> "$RESULTS_FILE"
             else
                 CRON_ERR=$?
-                if [ $CRON_ERR -eq 1 ]; then
+                if [ "$CRON_ERR" -eq 1 ]; then
                     test_info "User $WP_USER has no crontab (OK - means empty)"
                 else
                     test_warn "Cannot read crontab for $WP_USER (exit code: $CRON_ERR)"
@@ -791,7 +791,7 @@ TOTAL TESTS: $TOTAL
 Completed: $(date)
 EOF
 
-if [ $FAIL -eq 0 ]; then
+if [ "$FAIL" -eq 0 ]; then
     echo -e "${GREEN}✓ ALL CRITICAL TESTS PASSED${NC}"
     echo "✓ ALL CRITICAL TESTS PASSED" >> "$RESULTS_FILE"
     echo ""
diff --git a/testing/validate-plesk.sh b/testing/validate-plesk.sh
index 12d8006..d65070b 100755
--- a/testing/validate-plesk.sh
+++ b/testing/validate-plesk.sh
@@ -335,7 +335,7 @@ if command -v mysql &> /dev/null; then
         test_info "Databases without underscores: $NO_UNDERSCORES"
 
         # Check if databases follow username_ pattern or no prefix
-        if [ $NO_UNDERSCORES -gt 0 ]; then
+        if [ "$NO_UNDERSCORES" -gt 0 ]; then
             test_info "Found databases without underscores (suggests NO PREFIX pattern)"
             test_info "Sample databases without prefix:"
             echo "$DB_LIST" | grep -v "_" | grep -v "test" | head -5 >> "$RESULTS_FILE"
@@ -477,7 +477,7 @@ if command -v crontab &> /dev/null; then
             crontab -u "$CRON_USER" -l 2>/dev/null >> "$RESULTS_FILE"
         else
             CRON_READ_ERR=$?
-            if [ $CRON_READ_ERR -eq 1 ]; then
+            if [ "$CRON_READ_ERR" -eq 1 ]; then
                 test_info "User $CRON_USER has no crontab (this is OK - means empty)"
             else
                 test_warn "Cannot read crontab for $CRON_USER (exit code: $CRON_READ_ERR)"
@@ -511,7 +511,7 @@ if command -v crontab &> /dev/null; then
     fi
 
     # Test plesk bin cron if available
-    if [ $HAS_PLESK_CRON -eq 1 ] && [ -n "$TEST_DOMAIN" ]; then
+    if [ "$HAS_PLESK_CRON" -eq 1 ] && [ -n "$TEST_DOMAIN" ]; then
         test_info "Testing Plesk cron management for domain: $TEST_DOMAIN"
 
         # Try to list cron jobs via plesk
@@ -535,7 +535,7 @@ if command -v crontab &> /dev/null; then
     if [ -n "$CRON_USER" ]; then
         echo "RECOMMENDED: Use standard crontab -u $CRON_USER for cron jobs" >> "$RESULTS_FILE"
     fi
-    if [ $HAS_PLESK_CRON -eq 1 ]; then
+    if [ "$HAS_PLESK_CRON" -eq 1 ]; then
         echo "ALTERNATIVE: Plesk bin cron available but may be for web UI management only" >> "$RESULTS_FILE"
     fi