diff --git a/molecule/default/molecule.yml b/molecule/default/molecule.yml
index 064b4643..4b1b2677 100644
--- a/molecule/default/molecule.yml
+++ b/molecule/default/molecule.yml
@@ -10,20 +10,35 @@ platforms:
   - name: bionic
     image: solita/ubuntu-systemd:bionic
     command: /sbin/init
-    privileged: true
     ulimits:
       - nofile:262144:262144
-#  - name: xenial
-#    image: solita/ubuntu-systemd:xenial
-#    privileged: true
-#    command: /sbin/init
+    privileged: true
+    memory_reservation: 5120m
+#- name: xenial
+#  image: solita/ubuntu-systemd:xenial
+#  privileged: true
+#  memory_reservation: 2048m
+#  command: /sbin/init
+#  ulimits:
+#    - nofile:262144:262144
 #  - name: trusty
 #    image: ubuntu:trusty
+#    privileged: true
+#    memory_reservation: 2048m
+#    ulimits:
+#      - nofile:262144:262144
 #  - name: centos6
 #    image: centos:6
+#    privileged: true
+#    memory_reservation: 2048m
+#    ulimits:
+#      - nofile:262144:262144
 #  - name: centos7
 #    image: milcom/centos7-systemd
+#    memory_reservation: 2048m
 #    privileged: true
+#    ulimits:
+#      - nofile:262144:262144
 provisioner:
   name: ansible
   env: