diff --git a/lib/ansible/modules/network/fortios/fortios_vpn_certificate_setting.py b/lib/ansible/modules/network/fortios/fortios_vpn_certificate_setting.py
new file mode 100644
index 00000000000..c34403b8f26
--- /dev/null
+++ b/lib/ansible/modules/network/fortios/fortios_vpn_certificate_setting.py
@@ -0,0 +1,445 @@
+#!/usr/bin/python
+from __future__ import (absolute_import, division, print_function)
+# Copyright 2019 Fortinet, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+__metaclass__ = type
+
+ANSIBLE_METADATA = {'status': ['preview'],
+                    'supported_by': 'community',
+                    'metadata_version': '1.1'}
+
+DOCUMENTATION = '''
+---
+module: fortios_vpn_certificate_setting
+short_description: VPN certificate setting in Fortinet's FortiOS and FortiGate.
+description:
+    - This module is able to configure a FortiGate or FortiOS (FOS) device by allowing the
+      user to set and modify vpn_certificate feature and setting category.
+      Examples include all parameters and values need to be adjusted to datasources before usage.
+      Tested with FOS v6.0.5
+version_added: "2.9"
+author:
+    - Miguel Angel Munoz (@mamunozgonzalez)
+    - Nicolas Thomas (@thomnico)
+notes:
+    - Requires fortiosapi library developed by Fortinet
+    - Run as a local_action in your playbook
+requirements:
+    - fortiosapi>=0.9.8
+options:
+    host:
+        description:
+            - FortiOS or FortiGate IP address.
+        type: str
+        required: false
+    username:
+        description:
+            - FortiOS or FortiGate username.
+        type: str
+        required: false
+    password:
+        description:
+            - FortiOS or FortiGate password.
+        type: str
+        default: ""
+    vdom:
+        description:
+            - Virtual domain, among those defined previously. A vdom is a
+              virtual instance of the FortiGate that can be configured and
+              used as a different unit.
+        type: str
+        default: root
+    https:
+        description:
+            - Indicates if the requests towards FortiGate must use HTTPS protocol.
+        type: bool
+        default: true
+    ssl_verify:
+        description:
+            - Ensures FortiGate certificate must be verified by a proper CA.
+        type: bool
+        default: true
+    vpn_certificate_setting:
+        description:
+            - VPN certificate setting.
+        default: null
+        type: dict
+        suboptions:
+            certname_dsa1024:
+                description:
+                    - 1024 bit DSA key certificate for re-signing server certificates for SSL inspection. Source vpn.certificate.local.name.
+                type: str
+            certname_dsa2048:
+                description:
+                    - 2048 bit DSA key certificate for re-signing server certificates for SSL inspection. Source vpn.certificate.local.name.
+                type: str
+            certname_ecdsa256:
+                description:
+                    - 256 bit ECDSA key certificate for re-signing server certificates for SSL inspection. Source vpn.certificate.local.name.
+                type: str
+            certname_ecdsa384:
+                description:
+                    - 384 bit ECDSA key certificate for re-signing server certificates for SSL inspection. Source vpn.certificate.local.name.
+                type: str
+            certname_rsa1024:
+                description:
+                    - 1024 bit RSA key certificate for re-signing server certificates for SSL inspection. Source vpn.certificate.local.name.
+                type: str
+            certname_rsa2048:
+                description:
+                    - 2048 bit RSA key certificate for re-signing server certificates for SSL inspection. Source vpn.certificate.local.name.
+                type: str
+            check_ca_cert:
+                description:
+                    - Enable/disable verification of the user certificate and pass authentication if any CA in the chain is trusted .
+                type: str
+                choices:
+                    - enable
+                    - disable
+            check_ca_chain:
+                description:
+                    - Enable/disable verification of the entire certificate chain and pass authentication only if the chain is complete and all of the CAs in
+                       the chain are trusted .
+                type: str
+                choices:
+                    - enable
+                    - disable
+            cmp_save_extra_certs:
+                description:
+                    - Enable/disable saving extra certificates in CMP mode.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            cn_match:
+                description:
+                    - When searching for a matching certificate, control how to find matches in the cn attribute of the certificate subject name.
+                type: str
+                choices:
+                    - substring
+                    - value
+            ocsp_default_server:
+                description:
+                    - Default OCSP server. Source vpn.certificate.ocsp-server.name.
+                type: str
+            ocsp_status:
+                description:
+                    - Enable/disable receiving certificates using the OCSP.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            ssl_min_proto_version:
+                description:
+                    - Minimum supported protocol version for SSL/TLS connections .
+                type: str
+                choices:
+                    - default
+                    - SSLv3
+                    - TLSv1
+                    - TLSv1-1
+                    - TLSv1-2
+            ssl_ocsp_option:
+                description:
+                    - Specify whether the OCSP URL is from the certificate or the default OCSP server.
+                type: str
+                choices:
+                    - certificate
+                    - server
+            ssl_ocsp_status:
+                description:
+                    - Enable/disable SSL OCSP.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            strict_crl_check:
+                description:
+                    - Enable/disable strict mode CRL checking.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            strict_ocsp_check:
+                description:
+                    - Enable/disable strict mode OCSP checking.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            subject_match:
+                description:
+                    - When searching for a matching certificate, control how to find matches in the certificate subject name.
+                type: str
+                choices:
+                    - substring
+                    - value
+'''
+
+EXAMPLES = '''
+- hosts: localhost
+  vars:
+   host: "192.168.122.40"
+   username: "admin"
+   password: ""
+   vdom: "root"
+   ssl_verify: "False"
+  tasks:
+  - name: VPN certificate setting.
+    fortios_vpn_certificate_setting:
+      host:  "{{ host }}"
+      username: "{{ username }}"
+      password: "{{ password }}"
+      vdom:  "{{ vdom }}"
+      https: "False"
+      vpn_certificate_setting:
+        certname_dsa1024: "<your_own_value> (source vpn.certificate.local.name)"
+        certname_dsa2048: "<your_own_value> (source vpn.certificate.local.name)"
+        certname_ecdsa256: "<your_own_value> (source vpn.certificate.local.name)"
+        certname_ecdsa384: "<your_own_value> (source vpn.certificate.local.name)"
+        certname_rsa1024: "<your_own_value> (source vpn.certificate.local.name)"
+        certname_rsa2048: "<your_own_value> (source vpn.certificate.local.name)"
+        check_ca_cert: "enable"
+        check_ca_chain: "enable"
+        cmp_save_extra_certs: "enable"
+        cn_match: "substring"
+        ocsp_default_server: "<your_own_value> (source vpn.certificate.ocsp-server.name)"
+        ocsp_status: "enable"
+        ssl_min_proto_version: "default"
+        ssl_ocsp_option: "certificate"
+        ssl_ocsp_status: "enable"
+        strict_crl_check: "enable"
+        strict_ocsp_check: "enable"
+        subject_match: "substring"
+'''
+
+RETURN = '''
+build:
+  description: Build number of the fortigate image
+  returned: always
+  type: str
+  sample: '1547'
+http_method:
+  description: Last method used to provision the content into FortiGate
+  returned: always
+  type: str
+  sample: 'PUT'
+http_status:
+  description: Last result given by FortiGate on last operation applied
+  returned: always
+  type: str
+  sample: "200"
+mkey:
+  description: Master key (id) used in the last call to FortiGate
+  returned: success
+  type: str
+  sample: "id"
+name:
+  description: Name of the table used to fulfill the request
+  returned: always
+  type: str
+  sample: "urlfilter"
+path:
+  description: Path of the table used to fulfill the request
+  returned: always
+  type: str
+  sample: "webfilter"
+revision:
+  description: Internal revision number
+  returned: always
+  type: str
+  sample: "17.0.2.10658"
+serial:
+  description: Serial number of the unit
+  returned: always
+  type: str
+  sample: "FGVMEVYYQT3AB5352"
+status:
+  description: Indication of the operation's result
+  returned: always
+  type: str
+  sample: "success"
+vdom:
+  description: Virtual domain used
+  returned: always
+  type: str
+  sample: "root"
+version:
+  description: Version of the FortiGate
+  returned: always
+  type: str
+  sample: "v5.6.3"
+
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.connection import Connection
+from ansible.module_utils.network.fortios.fortios import FortiOSHandler
+from ansible.module_utils.network.fortimanager.common import FAIL_SOCKET_MSG
+
+
+def login(data, fos):
+    host = data['host']
+    username = data['username']
+    password = data['password']
+    ssl_verify = data['ssl_verify']
+
+    fos.debug('on')
+    if 'https' in data and not data['https']:
+        fos.https('off')
+    else:
+        fos.https('on')
+
+    fos.login(host, username, password, verify=ssl_verify)
+
+
+def filter_vpn_certificate_setting_data(json):
+    option_list = ['certname_dsa1024', 'certname_dsa2048', 'certname_ecdsa256',
+                   'certname_ecdsa384', 'certname_rsa1024', 'certname_rsa2048',
+                   'check_ca_cert', 'check_ca_chain', 'cmp_save_extra_certs',
+                   'cn_match', 'ocsp_default_server', 'ocsp_status',
+                   'ssl_min_proto_version', 'ssl_ocsp_option', 'ssl_ocsp_status',
+                   'strict_crl_check', 'strict_ocsp_check', 'subject_match']
+    dictionary = {}
+
+    for attribute in option_list:
+        if attribute in json and json[attribute] is not None:
+            dictionary[attribute] = json[attribute]
+
+    return dictionary
+
+
+def underscore_to_hyphen(data):
+    if isinstance(data, list):
+        for elem in data:
+            elem = underscore_to_hyphen(elem)
+    elif isinstance(data, dict):
+        new_data = {}
+        for k, v in data.items():
+            new_data[k.replace('_', '-')] = underscore_to_hyphen(v)
+        data = new_data
+
+    return data
+
+
+def vpn_certificate_setting(data, fos):
+    vdom = data['vdom']
+    vpn_certificate_setting_data = data['vpn_certificate_setting']
+    filtered_data = underscore_to_hyphen(filter_vpn_certificate_setting_data(vpn_certificate_setting_data))
+
+    return fos.set('vpn.certificate',
+                   'setting',
+                   data=filtered_data,
+                   vdom=vdom)
+
+
+def is_successful_status(status):
+    return status['status'] == "success" or \
+        status['http_method'] == "DELETE" and status['http_status'] == 404
+
+
+def fortios_vpn_certificate(data, fos):
+
+    if data['vpn_certificate_setting']:
+        resp = vpn_certificate_setting(data, fos)
+
+    return not is_successful_status(resp), \
+        resp['status'] == "success", \
+        resp
+
+
+def main():
+    fields = {
+        "host": {"required": False, "type": "str"},
+        "username": {"required": False, "type": "str"},
+        "password": {"required": False, "type": "str", "default": "", "no_log": True},
+        "vdom": {"required": False, "type": "str", "default": "root"},
+        "https": {"required": False, "type": "bool", "default": True},
+        "ssl_verify": {"required": False, "type": "bool", "default": True},
+        "vpn_certificate_setting": {
+            "required": False, "type": "dict", "default": None,
+            "options": {
+                "certname_dsa1024": {"required": False, "type": "str"},
+                "certname_dsa2048": {"required": False, "type": "str"},
+                "certname_ecdsa256": {"required": False, "type": "str"},
+                "certname_ecdsa384": {"required": False, "type": "str"},
+                "certname_rsa1024": {"required": False, "type": "str"},
+                "certname_rsa2048": {"required": False, "type": "str"},
+                "check_ca_cert": {"required": False, "type": "str",
+                                  "choices": ["enable", "disable"]},
+                "check_ca_chain": {"required": False, "type": "str",
+                                   "choices": ["enable", "disable"]},
+                "cmp_save_extra_certs": {"required": False, "type": "str",
+                                         "choices": ["enable", "disable"]},
+                "cn_match": {"required": False, "type": "str",
+                             "choices": ["substring", "value"]},
+                "ocsp_default_server": {"required": False, "type": "str"},
+                "ocsp_status": {"required": False, "type": "str",
+                                "choices": ["enable", "disable"]},
+                "ssl_min_proto_version": {"required": False, "type": "str",
+                                          "choices": ["default", "SSLv3", "TLSv1",
+                                                      "TLSv1-1", "TLSv1-2"]},
+                "ssl_ocsp_option": {"required": False, "type": "str",
+                                    "choices": ["certificate", "server"]},
+                "ssl_ocsp_status": {"required": False, "type": "str",
+                                    "choices": ["enable", "disable"]},
+                "strict_crl_check": {"required": False, "type": "str",
+                                     "choices": ["enable", "disable"]},
+                "strict_ocsp_check": {"required": False, "type": "str",
+                                      "choices": ["enable", "disable"]},
+                "subject_match": {"required": False, "type": "str",
+                                  "choices": ["substring", "value"]}
+
+            }
+        }
+    }
+
+    module = AnsibleModule(argument_spec=fields,
+                           supports_check_mode=False)
+
+    # legacy_mode refers to using fortiosapi instead of HTTPAPI
+    legacy_mode = 'host' in module.params and module.params['host'] is not None and \
+                  'username' in module.params and module.params['username'] is not None and \
+                  'password' in module.params and module.params['password'] is not None
+
+    if not legacy_mode:
+        if module._socket_path:
+            connection = Connection(module._socket_path)
+            fos = FortiOSHandler(connection)
+
+            is_error, has_changed, result = fortios_vpn_certificate(module.params, fos)
+        else:
+            module.fail_json(**FAIL_SOCKET_MSG)
+    else:
+        try:
+            from fortiosapi import FortiOSAPI
+        except ImportError:
+            module.fail_json(msg="fortiosapi module is required")
+
+        fos = FortiOSAPI()
+
+        login(module.params, fos)
+        is_error, has_changed, result = fortios_vpn_certificate(module.params, fos)
+        fos.logout()
+
+    if not is_error:
+        module.exit_json(changed=has_changed, meta=result)
+    else:
+        module.fail_json(msg="Error in repo", meta=result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/test/units/modules/network/fortios/test_fortios_vpn_certificate_setting.py b/test/units/modules/network/fortios/test_fortios_vpn_certificate_setting.py
new file mode 100644
index 00000000000..2fd011233ed
--- /dev/null
+++ b/test/units/modules/network/fortios/test_fortios_vpn_certificate_setting.py
@@ -0,0 +1,287 @@
+# Copyright 2019 Fortinet, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <https://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import json
+import pytest
+from mock import ANY
+from ansible.module_utils.network.fortios.fortios import FortiOSHandler
+
+try:
+    from ansible.modules.network.fortios import fortios_vpn_certificate_setting
+except ImportError:
+    pytest.skip("Could not load required modules for testing", allow_module_level=True)
+
+
+@pytest.fixture(autouse=True)
+def connection_mock(mocker):
+    connection_class_mock = mocker.patch('ansible.modules.network.fortios.fortios_vpn_certificate_setting.Connection')
+    return connection_class_mock
+
+
+fos_instance = FortiOSHandler(connection_mock)
+
+
+def test_vpn_certificate_setting_creation(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'success', 'http_method': 'POST', 'http_status': 200}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'vpn_certificate_setting': {
+            'certname_dsa1024': 'test_value_3',
+            'certname_dsa2048': 'test_value_4',
+            'certname_ecdsa256': 'test_value_5',
+            'certname_ecdsa384': 'test_value_6',
+            'certname_rsa1024': 'test_value_7',
+            'certname_rsa2048': 'test_value_8',
+            'check_ca_cert': 'enable',
+            'check_ca_chain': 'enable',
+            'cmp_save_extra_certs': 'enable',
+            'cn_match': 'substring',
+            'ocsp_default_server': 'test_value_13',
+            'ocsp_status': 'enable',
+            'ssl_min_proto_version': 'default',
+            'ssl_ocsp_option': 'certificate',
+            'ssl_ocsp_status': 'enable',
+            'strict_crl_check': 'enable',
+            'strict_ocsp_check': 'enable',
+            'subject_match': 'substring'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_vpn_certificate_setting.fortios_vpn_certificate(input_data, fos_instance)
+
+    expected_data = {
+        'certname-dsa1024': 'test_value_3',
+        'certname-dsa2048': 'test_value_4',
+        'certname-ecdsa256': 'test_value_5',
+        'certname-ecdsa384': 'test_value_6',
+        'certname-rsa1024': 'test_value_7',
+        'certname-rsa2048': 'test_value_8',
+        'check-ca-cert': 'enable',
+        'check-ca-chain': 'enable',
+        'cmp-save-extra-certs': 'enable',
+        'cn-match': 'substring',
+        'ocsp-default-server': 'test_value_13',
+        'ocsp-status': 'enable',
+        'ssl-min-proto-version': 'default',
+        'ssl-ocsp-option': 'certificate',
+        'ssl-ocsp-status': 'enable',
+        'strict-crl-check': 'enable',
+        'strict-ocsp-check': 'enable',
+        'subject-match': 'substring'
+    }
+
+    set_method_mock.assert_called_with('vpn.certificate', 'setting', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert not is_error
+    assert changed
+    assert response['status'] == 'success'
+    assert response['http_status'] == 200
+
+
+def test_vpn_certificate_setting_creation_fails(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'error', 'http_method': 'POST', 'http_status': 500}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'vpn_certificate_setting': {
+            'certname_dsa1024': 'test_value_3',
+            'certname_dsa2048': 'test_value_4',
+            'certname_ecdsa256': 'test_value_5',
+            'certname_ecdsa384': 'test_value_6',
+            'certname_rsa1024': 'test_value_7',
+            'certname_rsa2048': 'test_value_8',
+            'check_ca_cert': 'enable',
+            'check_ca_chain': 'enable',
+            'cmp_save_extra_certs': 'enable',
+            'cn_match': 'substring',
+            'ocsp_default_server': 'test_value_13',
+            'ocsp_status': 'enable',
+            'ssl_min_proto_version': 'default',
+            'ssl_ocsp_option': 'certificate',
+            'ssl_ocsp_status': 'enable',
+            'strict_crl_check': 'enable',
+            'strict_ocsp_check': 'enable',
+            'subject_match': 'substring'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_vpn_certificate_setting.fortios_vpn_certificate(input_data, fos_instance)
+
+    expected_data = {
+        'certname-dsa1024': 'test_value_3',
+        'certname-dsa2048': 'test_value_4',
+        'certname-ecdsa256': 'test_value_5',
+        'certname-ecdsa384': 'test_value_6',
+        'certname-rsa1024': 'test_value_7',
+        'certname-rsa2048': 'test_value_8',
+        'check-ca-cert': 'enable',
+        'check-ca-chain': 'enable',
+        'cmp-save-extra-certs': 'enable',
+        'cn-match': 'substring',
+        'ocsp-default-server': 'test_value_13',
+        'ocsp-status': 'enable',
+        'ssl-min-proto-version': 'default',
+        'ssl-ocsp-option': 'certificate',
+        'ssl-ocsp-status': 'enable',
+        'strict-crl-check': 'enable',
+        'strict-ocsp-check': 'enable',
+        'subject-match': 'substring'
+    }
+
+    set_method_mock.assert_called_with('vpn.certificate', 'setting', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert is_error
+    assert not changed
+    assert response['status'] == 'error'
+    assert response['http_status'] == 500
+
+
+def test_vpn_certificate_setting_idempotent(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'error', 'http_method': 'DELETE', 'http_status': 404}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'vpn_certificate_setting': {
+            'certname_dsa1024': 'test_value_3',
+            'certname_dsa2048': 'test_value_4',
+            'certname_ecdsa256': 'test_value_5',
+            'certname_ecdsa384': 'test_value_6',
+            'certname_rsa1024': 'test_value_7',
+            'certname_rsa2048': 'test_value_8',
+            'check_ca_cert': 'enable',
+            'check_ca_chain': 'enable',
+            'cmp_save_extra_certs': 'enable',
+            'cn_match': 'substring',
+            'ocsp_default_server': 'test_value_13',
+            'ocsp_status': 'enable',
+            'ssl_min_proto_version': 'default',
+            'ssl_ocsp_option': 'certificate',
+            'ssl_ocsp_status': 'enable',
+            'strict_crl_check': 'enable',
+            'strict_ocsp_check': 'enable',
+            'subject_match': 'substring'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_vpn_certificate_setting.fortios_vpn_certificate(input_data, fos_instance)
+
+    expected_data = {
+        'certname-dsa1024': 'test_value_3',
+        'certname-dsa2048': 'test_value_4',
+        'certname-ecdsa256': 'test_value_5',
+        'certname-ecdsa384': 'test_value_6',
+        'certname-rsa1024': 'test_value_7',
+        'certname-rsa2048': 'test_value_8',
+        'check-ca-cert': 'enable',
+        'check-ca-chain': 'enable',
+        'cmp-save-extra-certs': 'enable',
+        'cn-match': 'substring',
+        'ocsp-default-server': 'test_value_13',
+        'ocsp-status': 'enable',
+        'ssl-min-proto-version': 'default',
+        'ssl-ocsp-option': 'certificate',
+        'ssl-ocsp-status': 'enable',
+        'strict-crl-check': 'enable',
+        'strict-ocsp-check': 'enable',
+        'subject-match': 'substring'
+    }
+
+    set_method_mock.assert_called_with('vpn.certificate', 'setting', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert not is_error
+    assert not changed
+    assert response['status'] == 'error'
+    assert response['http_status'] == 404
+
+
+def test_vpn_certificate_setting_filter_foreign_attributes(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'success', 'http_method': 'POST', 'http_status': 200}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'vpn_certificate_setting': {
+            'random_attribute_not_valid': 'tag',
+            'certname_dsa1024': 'test_value_3',
+            'certname_dsa2048': 'test_value_4',
+            'certname_ecdsa256': 'test_value_5',
+            'certname_ecdsa384': 'test_value_6',
+            'certname_rsa1024': 'test_value_7',
+            'certname_rsa2048': 'test_value_8',
+            'check_ca_cert': 'enable',
+            'check_ca_chain': 'enable',
+            'cmp_save_extra_certs': 'enable',
+            'cn_match': 'substring',
+            'ocsp_default_server': 'test_value_13',
+            'ocsp_status': 'enable',
+            'ssl_min_proto_version': 'default',
+            'ssl_ocsp_option': 'certificate',
+            'ssl_ocsp_status': 'enable',
+            'strict_crl_check': 'enable',
+            'strict_ocsp_check': 'enable',
+            'subject_match': 'substring'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_vpn_certificate_setting.fortios_vpn_certificate(input_data, fos_instance)
+
+    expected_data = {
+        'certname-dsa1024': 'test_value_3',
+        'certname-dsa2048': 'test_value_4',
+        'certname-ecdsa256': 'test_value_5',
+        'certname-ecdsa384': 'test_value_6',
+        'certname-rsa1024': 'test_value_7',
+        'certname-rsa2048': 'test_value_8',
+        'check-ca-cert': 'enable',
+        'check-ca-chain': 'enable',
+        'cmp-save-extra-certs': 'enable',
+        'cn-match': 'substring',
+        'ocsp-default-server': 'test_value_13',
+        'ocsp-status': 'enable',
+        'ssl-min-proto-version': 'default',
+        'ssl-ocsp-option': 'certificate',
+        'ssl-ocsp-status': 'enable',
+        'strict-crl-check': 'enable',
+        'strict-ocsp-check': 'enable',
+        'subject-match': 'substring'
+    }
+
+    set_method_mock.assert_called_with('vpn.certificate', 'setting', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert not is_error
+    assert changed
+    assert response['status'] == 'success'
+    assert response['http_status'] == 200