diff --git a/include/tests_containers b/include/tests_containers
index a02ea268..96fed9e8 100644
--- a/include/tests_containers
+++ b/include/tests_containers
@@ -107,7 +107,7 @@
             LogText "Result: disabling further Docker tests as docker version gave exit code other than zero (0)"
             RUN_DOCKER_TESTS=0
         fi
-        FIND=$(${DOCKERBINARY} info 2>&1 | ${GREPBINARY} "^WARNING:" | ${CUTBINARY} -d " " -f 2- | ${SEDBINARY} 's/ /:space:/g')
+        FIND=$(${DOCKERBINARY} info 2>&1 | ${GREPBINARY} -E "^WARNING:|^ERROR:" | ${CUTBINARY} -d " " -f 2- | ${SEDBINARY} 's/ /:space:/g')
         if [ ! "${FIND}" = "" ]; then
             LogText "Result: found warning(s) in output"
             for I in ${FIND}; do