diff --git a/tests/6_docker_security_operations.sh b/tests/6_docker_security_operations.sh
index 7cc1320..f5b1f01 100644
--- a/tests/6_docker_security_operations.sh
+++ b/tests/6_docker_security_operations.sh
@@ -37,6 +37,14 @@ set +f; unset IFS
 # 6.6
 check_6_6="6.6 - Avoid image sprawl"
 images=$(docker images -q | wc -l | awk '{print $1}')
+active_images=0
+
+for c in $(docker inspect -f "{{.Image}}" $(docker ps -qa)); do
+  if [[ $(docker images --no-trunc -a | grep $c) ]]; then
+    ((active_images++))
+  fi
+done
+
 if [ "$images" -gt 100 ]; then
   warn "$check_6_6"
   warn "     * There are currently: $images images"
@@ -45,6 +53,10 @@ else
   info "     * There are currently: $images images"
 fi
 
+if [[ "$active_images" -lt "$((images / 2))" ]]; then
+  warn "     * Only $active_images out of $images are in use"
+fi
+
 # 6.7
 check_6_7="6.7 - Avoid container sprawl"
 total_containers=$(docker info 2>/dev/null | grep "Containers" | awk '{print $2}')