diff --git a/include/tests_containers b/include/tests_containers
index dcd4d238..ce350aee 100644
--- a/include/tests_containers
+++ b/include/tests_containers
@@ -119,6 +119,9 @@
         # Check total of containers
         logtext "Test: checking total amount of Docker containers"
         DOCKER_CONTAINERS_TOTAL=`${DOCKERBINARY} info 2> /dev/null | grep "^Containers: " | awk '{ print $2 }'`
+        if [ ${DOCKER_CONTAINERS_TOTAL} -z ]; then
+            DOCKER_CONTAINERS_TOTAL=0
+        fi
         logtext "Result: docker info shows ${DOCKER_CONTAINERS_TOTAL} containers"
         DOCKER_CONTAINERS_TOTAL2=`${DOCKERBINARY} ps -a 2> /dev/null | grep -v "CONTAINER" | wc -l`
         logtext "Result: docker ps -a shows ${DOCKER_CONTAINERS_TOTAL2} containers"
@@ -131,7 +134,7 @@
         fi
 
         # Check running instances
-        DOCKER_CONTAINERS_RUNNING=`${DOCKERBINARY} ps | grep -v "CONTAINER" | wc -l`
+        DOCKER_CONTAINERS_RUNNING=`${DOCKERBINARY} ps 2> /dev/null | grep -v "CONTAINER" | wc -l`
         Display --indent 8 --text "- Running containers" --result "${DOCKER_CONTAINERS_RUNNING}" --color GREEN
         if [ ${DOCKER_CONTAINERS_RUNNING} -gt 0 ]; then
             logtext "Result: ${DOCKER_CONTAINERS_RUNNING} containers are currently active"