diff --git a/roles/undercloud-ram/molecule/default/Dockerfile.j2 b/roles/undercloud-ram/molecule/default/Dockerfile.j2
new file mode 100644
index 000000000..1b91a0e0b
--- /dev/null
+++ b/roles/undercloud-ram/molecule/default/Dockerfile.j2
@@ -0,0 +1,37 @@
+# Molecule managed
+# Copyright 2019 Red Hat, Inc.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+
+{% if item.registry is defined %}
+FROM {{ item.registry.url }}/{{ item.image }}
+{% else %}
+FROM {{ item.image }}
+{% endif %}
+
+RUN if [ $(command -v apt-get) ]; then apt-get update && apt-get install -y python sudo bash ca-certificates && apt-get clean; \
+    elif [ $(command -v dnf) ]; then dnf makecache && dnf --assumeyes install python sudo python-devel python*-dnf bash {{ item.pkg_extras | default('') }} && dnf clean all; \
+    elif [ $(command -v yum) ]; then yum makecache fast && yum install -y python sudo yum-plugin-ovl python-setuptools bash {{ item.pkg_extras | default('') }} && sed -i 's/plugins=0/plugins=1/g' /etc/yum.conf && yum clean all; \
+    elif [ $(command -v zypper) ]; then zypper refresh && zypper install -y python sudo bash python-xml {{ item.pkg_extras | default('') }} && zypper clean -a; \
+    elif [ $(command -v apk) ]; then apk update && apk add --no-cache python sudo bash ca-certificates {{ item.pkg_extras | default('') }}; \
+    elif [ $(command -v xbps-install) ]; then xbps-install -Syu && xbps-install -y python sudo bash ca-certificates {{ item.pkg_extras | default('') }} && xbps-remove -O; fi
+
+{% for pkg in item.easy_install | default([]) %}
+# install pip for centos where there is no python-pip rpm in default repos
+RUN easy_install {{ pkg }}
+{% endfor %}
+
+
+CMD ["sh", "-c", "while true; do sleep 10000; done"]
diff --git a/roles/undercloud-ram/molecule/default/molecule.yml b/roles/undercloud-ram/molecule/default/molecule.yml
new file mode 100644
index 000000000..5eb59c254
--- /dev/null
+++ b/roles/undercloud-ram/molecule/default/molecule.yml
@@ -0,0 +1,46 @@
+---
+driver:
+  name: docker
+
+log: true
+
+platforms:
+  - name: centos7
+    hostname: centos7
+    image: centos:7
+    pkg_extras: python-setuptools
+    easy_install:
+      - pip
+    environment: &env
+      http_proxy: "{{ lookup('env', 'http_proxy') }}"
+      https_proxy: "{{ lookup('env', 'https_proxy') }}"
+
+  - name: fedora28
+    hostname: fedora28
+    image: fedora:28
+    pkg_extras: python*-setuptools
+    environment:
+      <<: *env
+
+provisioner:
+  name: ansible
+  log: true
+  env:
+    ANSIBLE_STDOUT_CALLBACK: yaml
+
+scenario:
+  test_sequence:
+    - destroy
+    - create
+    - prepare
+    - converge
+    - verify
+    - destroy
+
+lint:
+  enabled: false
+
+verifier:
+  name: testinfra
+  lint:
+    name: flake8
diff --git a/roles/undercloud-ram/molecule/default/playbook.yml b/roles/undercloud-ram/molecule/default/playbook.yml
new file mode 100644
index 000000000..2e044c17a
--- /dev/null
+++ b/roles/undercloud-ram/molecule/default/playbook.yml
@@ -0,0 +1,42 @@
+---
+# Copyright 2019 Red Hat, Inc.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+
+- name: Converge
+  hosts: all
+
+  vars:
+    min_undercloud_ram_gb: 1000000
+
+  tasks:
+    - block:
+        - include_role:
+            name: undercloud-ram
+      rescue:
+        - name: Clear host errors
+          meta: clear_host_errors
+
+        - debug:
+            msg: The validation works! End the playbook run
+
+        - name: End play
+          meta: end_play
+
+    - name: Fail the test
+      fail:
+        msg: |
+          The undercloud-ram role should have detected that there is not
+          enough RAM
diff --git a/roles/undercloud-ram/molecule/default/verify.yml b/roles/undercloud-ram/molecule/default/verify.yml
new file mode 100644
index 000000000..dfd4c7352
--- /dev/null
+++ b/roles/undercloud-ram/molecule/default/verify.yml
@@ -0,0 +1,15 @@
+---
+# Copyright 2019 Red Hat, Inc.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
diff --git a/roles/undercloud-ram/tasks/main.yml b/roles/undercloud-ram/tasks/main.yml
index 2e3b7c9e6..6aeb96d23 100644
--- a/roles/undercloud-ram/tasks/main.yml
+++ b/roles/undercloud-ram/tasks/main.yml
@@ -1,8 +1,9 @@
 ---
 - name: Verify the RAM requirements
-  fail:
+  debug:
     msg: >-
       The RAM on the undercloud node is {{ ansible_memtotal_mb }} MB,
-      the minimal recommended value is {{ min_undercloud_ram_gb|int * 1024 }} MB.
+      the minimal recommended value is
+      {{ min_undercloud_ram_gb|int * 1024 }} MB.
   # NOTE(shadower): converting GB to MB
   failed_when: "(ansible_memtotal_mb) < min_undercloud_ram_gb|int * 1024"
diff --git a/tox.ini b/tox.ini
index fdab58438..b47cecdf9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
-minversion = 2.0
-envlist = py35,py36,py27,pep8
+minversion = 3.8
+envlist = pep8,py35,py36,py27,molecule
 skipsdist = True
 
 [testenv]
@@ -58,3 +58,18 @@ deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
+
+[testenv:molecule]
+deps =
+    ansi2html
+    docker>=3.7
+    mock
+    molecule>=2.22rc3
+    pytest
+    pytest-cov
+    pytest-html
+    pytest-molecule>=1.0rc1
+    pytest-xdist
+    selinux
+commands =
+    python -m pytest --color=yes --html={envlogdir}/reports.html --self-contained-html {tty:-s} {posargs:roles}
diff --git a/zuul.d/layout.yaml b/zuul.d/layout.yaml
index 734e300bc..2a8eae1ce 100644
--- a/zuul.d/layout.yaml
+++ b/zuul.d/layout.yaml
@@ -4,6 +4,7 @@
       - openstack-python-jobs
       - openstack-python35-jobs
       - openstack-python36-jobs
+      - openstack-tox-molecule
       - check-requirements
       - publish-openstack-docs-pti
       - release-notes-jobs-python3