diff --git a/lib/ansible/modules/network/f5/bigip_device_auth.py b/lib/ansible/modules/network/f5/bigip_device_auth.py
new file mode 100644
index 0000000000..2c4cb313bf
--- /dev/null
+++ b/lib/ansible/modules/network/f5/bigip_device_auth.py
@@ -0,0 +1,805 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright: (c) 2018, F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.1',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+DOCUMENTATION = r'''
+---
+module: bigip_device_auth
+short_description: Manage system authentication on a BIG-IP
+description:
+  - Manage the system authentication configuration. This module can assist in configuring
+    a number of different system authentication types. Note that this module can not be used
+    to configure APM authentication types.
+version_added: 2.7
+options:
+  type:
+    description:
+      - The authentication type to manage with this module.
+      - Take special note that the parameters supported by this module will vary depending
+        on the C(type) that you are configuring.
+      - This module only supports a subset, at this time, of the total available auth types.
+    choices:
+      - tacacs
+      - local
+  servers:
+    description:
+      - Specifies a list of the IPv4 addresses for servers using the Terminal
+        Access Controller Access System (TACACS)+ protocol with which the system
+        communicates to obtain authorization data.
+      - For each address, an alternate TCP port number may be optionally specified
+        by specifying the C(port) key.
+      - If no port number is specified, the default port C(49163) is used.
+      - This parameter is supported by the C(tacacs) type.
+    suboptions:
+      address:
+        description:
+          - The IP address of the server.
+          - This field is required, unless you are specifying a simple list of servers.
+            In that case, the simple list can specify server IPs. See examples for
+            more clarification.
+      port:
+        description:
+          - The port of the server.
+        default: 49163
+  secret:
+    description:
+      - Secret key used to encrypt and decrypt packets sent or received from the
+        server.
+      - B(Do not) use the pound/hash sign in the secret for TACACS+ servers.
+      - When configuring TACACS+ auth for the first time, this value is required.
+  service_name:
+    description:
+      - Specifies the name of the service that the user is requesting to be
+        authorized to use.
+      - Identifying what the user is asking to be authorized for, enables the
+        TACACS+ server to behave differently for different types of authorization
+        requests.
+      - When configuring this form of system authentication, this setting is required.
+      - Note that the majority of TACACS+ implementations are of service type C(ppp),
+        so try that first.
+    choices:
+      - slip
+      - ppp
+      - arap
+      - shell
+      - tty-daemon
+      - connection
+      - system
+      - firewall
+  protocol_name:
+    description:
+      - Specifies the protocol associated with the value specified in C(service_name),
+        which is a subset of the associated service being used for client authorization
+        or system accounting.
+      - Note that the majority of TACACS+ implementations are of protocol type C(ip),
+        so try that first.
+    choices:
+      - lcp
+      - ip
+      - ipx
+      - atalk
+      - vines
+      - lat
+      - xremote
+      - tn3270
+      - telnet
+      - rlogin
+      - pad
+      - vpdn
+      - ftp
+      - http
+      - deccp
+      - osicp
+      - unknown
+  authentication:
+    description:
+      - Specifies the process the system employs when sending authentication requests.
+      - When C(use-first-server), specifies that the system sends authentication
+        attempts to only the first server in the list.
+      - When C(use-all-servers), specifies that the system sends an authentication
+        request to each server until authentication succeeds, or until the system has
+        sent a request to all servers in the list.
+      - This parameter is supported by the C(tacacs) type.
+    choices:
+      - use-first-server
+      - use-all-servers
+  use_for_auth:
+    description:
+      - Specifies whether or not this auth source is put in use on the system.
+    type: bool
+  state:
+    description:
+      - The state of the authentication configuration on the system.
+      - When C(present), guarantees that the system is configured for the specified C(type).
+      - When C(absent), sets the system auth source back to C(local).
+    default: present
+    choices:
+      - absent
+      - present
+  update_secret:
+    description:
+      - C(always) will allow to update secrets if the user chooses to do so.
+      - C(on_create) will only set the secret when a C(use_auth_source) is C(yes)
+        and TACACS+ is not currently the auth source.
+    default: always
+    choices:
+      - always
+      - on_create
+extends_documentation_fragment: f5
+author:
+  - Tim Rupp (@caphrim007)
+'''
+
+EXAMPLES = r'''
+- name: Set the system auth to TACACS+, default server port
+  bigip_device_auth:
+    type: tacacs
+    authentication: use-all-servers
+    protocol_name: ip
+    secret: secret
+    servers:
+      - 10.10.10.10
+      - 10.10.10.11
+    service_name: ppp
+    state: present
+    use_for_auth: yes
+    provider:
+      password: secret
+      server: lb.mydomain.com
+      user: admin
+  delegate_to: localhost
+
+- name: Set the system auth to TACACS+, override server port
+  bigip_device_auth:
+    type: tacacs
+    authentication: use-all-servers
+    protocol_name: ip
+    secret: secret
+    servers:
+      - address: 10.10.10.10
+        port: 1234
+      - 10.10.10.11
+    service_name: ppp
+    use_for_auth: yes
+    state: present
+    provider:
+      password: secret
+      server: lb.mydomain.com
+      user: admin
+  delegate_to: localhost
+'''
+
+RETURN = r'''
+servers:
+  description: List of servers used in TACACS authentication.
+  returned: changed
+  type: list
+  sample: ['1.2.2.1', '4.5.5.4']
+authentication:
+  description: Process the system uses to serve authentication requests when using TACACS.
+  returned: changed
+  type: string
+  sample: use-all-servers
+service_name:
+  description: Name of the service the user is requesting to be authorized to use.
+  returned: changed
+  type: string
+  sample: ppp
+protocol_name:
+  description: Name of the protocol associated with C(service_name) used for client authentication.
+  returned: changed
+  type: string
+  sample: ip
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.six import string_types
+
+try:
+    from library.module_utils.network.f5.bigip import F5RestClient
+    from library.module_utils.network.f5.common import F5ModuleError
+    from library.module_utils.network.f5.common import AnsibleF5Parameters
+    from library.module_utils.network.f5.common import cleanup_tokens
+    from library.module_utils.network.f5.common import fq_name
+    from library.module_utils.network.f5.common import f5_argument_spec
+    from library.module_utils.network.f5.common import exit_json
+    from library.module_utils.network.f5.common import fail_json
+except ImportError:
+    from ansible.module_utils.network.f5.bigip import F5RestClient
+    from ansible.module_utils.network.f5.common import F5ModuleError
+    from ansible.module_utils.network.f5.common import AnsibleF5Parameters
+    from ansible.module_utils.network.f5.common import cleanup_tokens
+    from ansible.module_utils.network.f5.common import fq_name
+    from ansible.module_utils.network.f5.common import f5_argument_spec
+    from ansible.module_utils.network.f5.common import exit_json
+    from ansible.module_utils.network.f5.common import fail_json
+
+
+class BaseParameters(AnsibleF5Parameters):
+    @property
+    def api_map(self):
+        return {}
+
+    @property
+    def api_attributes(self):
+        return []
+
+    @property
+    def returnables(self):
+        return []
+
+    @property
+    def updatables(self):
+        return []
+
+
+class BaseApiParameters(BaseParameters):
+    pass
+
+
+class BaseModuleParameters(BaseParameters):
+    pass
+
+
+class BaseChanges(BaseParameters):
+    def to_return(self):
+        result = {}
+        try:
+            for returnable in self.returnables:
+                result[returnable] = getattr(self, returnable)
+            result = self._filter_params(result)
+        except Exception:
+            pass
+        return result
+
+
+class BaseUsableChanges(BaseChanges):
+    pass
+
+
+class BaseReportableChanges(BaseChanges):
+    pass
+
+
+class TacacsParameters(BaseParameters):
+    api_map = {
+        'protocol': 'protocol_name',
+        'service': 'service_name'
+    }
+
+    api_attributes = [
+        'authentication',
+        'protocol',
+        'service',
+        'secret',
+        'servers'
+    ]
+
+    returnables = [
+        'servers',
+        'secret',
+        'authentication',
+        'service_name',
+        'protocol_name'
+    ]
+
+    updatables = [
+        'servers',
+        'secret',
+        'authentication',
+        'service_name',
+        'protocol_name',
+        'auth_source',
+    ]
+
+
+class TacacsApiParameters(TacacsParameters):
+    pass
+
+
+class TacacsModuleParameters(TacacsParameters):
+    @property
+    def servers(self):
+        if self._values['servers'] is None:
+            return None
+        result = []
+        for server in self._values['servers']:
+            if isinstance(server, dict):
+                if 'address' not in server:
+                    raise F5ModuleError(
+                        "An 'address' field must be provided when specifying separate fields to the 'servers' parameter."
+                    )
+                address = server.get('address')
+                port = server.get('port', 49163)
+            elif isinstance(server, string_types):
+                address = server
+                port = 49163
+            result.append('{0}:{1}'.format(address, port))
+        return result
+
+    @property
+    def auth_source(self):
+        return 'tacacs'
+
+
+class TacacsChanges(BaseChanges, TacacsParameters):
+    pass
+
+
+class TacacsUsableChanges(TacacsChanges):
+    pass
+
+
+class TacacsReportableChanges(TacacsChanges):
+    @property
+    def secret(self):
+        return None
+
+
+class Difference(object):
+    def __init__(self, want, have=None):
+        self.want = want
+        self.have = have
+
+    def compare(self, param):
+        try:
+            result = getattr(self, param)
+            return result
+        except AttributeError:
+            return self.__default(param)
+
+    def __default(self, param):
+        want = getattr(self.want, param)
+        try:
+            have = getattr(self.have, param)
+            if want != have:
+                return want
+        except AttributeError:
+            return want
+
+    @property
+    def secret(self):
+        if self.want.secret != self.have.secret and self.want.update_secret == 'always':
+            return self.want.secret
+
+
+class BaseManager(object):
+    def _set_changed_options(self):
+        changed = {}
+        for key in self.returnables:
+            if getattr(self.want, key) is not None:
+                changed[key] = getattr(self.want, key)
+        if changed:
+            self.changes = self.get_usable_changes(params=changed)
+
+    def _update_changed_options(self):
+        diff = Difference(self.want, self.have)
+        updatables = self.updatables
+        changed = dict()
+        for k in updatables:
+            change = diff.compare(k)
+            if change is None:
+                continue
+            else:
+                if isinstance(change, dict):
+                    changed.update(change)
+                else:
+                    changed[k] = change
+        if changed:
+            self.changes = self.get_usable_changes(params=changed)
+            return True
+        return False
+
+    def should_update(self):
+        result = self._update_changed_options()
+        if result:
+            return True
+        return False
+
+    def exec_module(self):
+        changed = False
+        result = dict()
+        state = self.want.state
+
+        if state == "present":
+            changed = self.present()
+        elif state == "absent":
+            changed = self.absent()
+
+        reportable = self.get_reportable_changes(params=self.changes.to_return())
+        changes = reportable.to_return()
+        result.update(**changes)
+        result.update(dict(changed=changed))
+        self._announce_deprecations(result)
+        return result
+
+    def _announce_deprecations(self, result):
+        warnings = result.pop('__warnings', [])
+        for warning in warnings:
+            self.client.module.deprecate(
+                msg=warning['msg'],
+                version=warning['version']
+            )
+
+    def present(self):
+        if self.exists():
+            return self.update()
+        return self.create()
+
+    def absent(self):
+        if self.exists():
+            return self.remove()
+        return False
+
+    def update_auth_source_on_device(self, source):
+        """Set the system auth source.
+
+        Configuring the authentication source is only one step in the process of setting
+        up an auth source. The other step is to inform the system of the auth source
+        you want to use.
+
+        This method is used for situations where
+
+        * The ``use_for_auth`` parameter is set to ``yes``
+        * The ``use_for_auth`` parameter is set to ``no``
+        * The ``state`` parameter is set to ``absent``
+
+        When ``state`` equal to ``absent``, before you can delete the TACACS+ configuration,
+        you must set the system auth to "something else". The system ships with a system
+        auth called "local", so this is the logical "something else" to use.
+
+        When ``use_for_auth`` is no, the same situation applies as when ``state`` equal
+        to ``absent`` is done above.
+
+        When ``use_for_auth`` is ``yes``, this method will set the current system auth
+        state to TACACS+.
+
+        Arguments:
+            source (string): The source that you want to set on the device.
+        """
+        params = dict(
+            type=source
+        )
+        uri = 'https://{0}:{1}/mgmt/tm/auth/source/'.format(
+            self.client.provider['server'],
+            self.client.provider['server_port']
+        )
+
+        resp = self.client.api.patch(uri, json=params)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+
+    def read_current_auth_source_from_device(self):
+        uri = "https://{0}:{1}/mgmt/tm/auth/source".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        return response['type']
+
+
+class LocalManager(BaseManager):
+    def __init__(self, *args, **kwargs):
+        self.module = kwargs.get('module', None)
+        self.client = kwargs.get('client', None)
+        self.want = self.get_module_parameters(params=self.module.params)
+        self.have = self.get_api_parameters()
+        self.changes = self.get_usable_changes()
+
+    @property
+    def returnables(self):
+        return []
+
+    @property
+    def updatables(self):
+        return []
+
+    def get_parameters(self, params=None):
+        return BaseParameters(params=params)
+
+    def get_usable_changes(self, params=None):
+        return BaseUsableChanges(params=params)
+
+    def get_reportable_changes(self, params=None):
+        return BaseReportableChanges(params=params)
+
+    def get_module_parameters(self, params=None):
+        return BaseModuleParameters(params=params)
+
+    def get_api_parameters(self, params=None):
+        return BaseApiParameters(params=params)
+
+    def exists(self):
+        uri = "https://{0}:{1}/mgmt/tm/auth/source".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        if response['type'] == 'local':
+            return True
+        return False
+
+    def create(self):
+        self._set_changed_options()
+        if self.module.check_mode:
+            return True
+        self.update_auth_source_on_device('local')
+        return True
+
+    def present(self):
+        if not self.exists():
+            return self.create()
+
+    def absent(self):
+        raise F5ModuleError(
+            "The 'local' type cannot be removed. "
+            "Instead, specify a 'state' of 'present' on other types."
+        )
+
+
+class TacacsManager(BaseManager):
+    def __init__(self, *args, **kwargs):
+        self.module = kwargs.get('module', None)
+        self.client = kwargs.get('client', None)
+        self.want = self.get_module_parameters(params=self.module.params)
+        self.have = self.get_api_parameters()
+        self.changes = self.get_usable_changes()
+
+    @property
+    def returnables(self):
+        return TacacsParameters.returnables
+
+    @property
+    def updatables(self):
+        return TacacsParameters.updatables
+
+    def get_usable_changes(self, params=None):
+        return TacacsUsableChanges(params=params)
+
+    def get_reportable_changes(self, params=None):
+        return TacacsReportableChanges(params=params)
+
+    def get_module_parameters(self, params=None):
+        return TacacsModuleParameters(params=params)
+
+    def get_api_parameters(self, params=None):
+        return TacacsApiParameters(params=params)
+
+    def exists(self):
+        uri = "https://{0}:{1}/mgmt/tm/auth/tacacs/~Common~system-auth".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError:
+            return False
+        if resp.status == 404 or 'code' in response and response['code'] == 404:
+            return False
+        return True
+
+    def create(self):
+        self._set_changed_options()
+        if self.module.check_mode:
+            return True
+        self.create_on_device()
+        if self.want.use_for_auth:
+            self.update_auth_source_on_device('tacacs')
+        return True
+
+    def update(self):
+        self.have = self.read_current_from_device()
+        if not self.should_update():
+            return False
+        if self.module.check_mode:
+            return True
+        result = False
+        if self.update_on_device():
+            result = True
+        if self.want.use_for_auth and self.changes.auth_source == 'tacacs':
+            self.update_auth_source_on_device('tacacs')
+            result = True
+        return result
+
+    def remove(self):
+        if self.module.check_mode:
+            return True
+        self.update_auth_source_on_device('local')
+        self.remove_from_device()
+        if self.exists():
+            raise F5ModuleError("Failed to delete the resource.")
+        return True
+
+    def create_on_device(self):
+        params = self.changes.api_params()
+        params['name'] = 'system-auth'
+        uri = "https://{0}:{1}/mgmt/tm/auth/tacacs".format(
+            self.client.provider['server'],
+            self.client.provider['server_port']
+        )
+        resp = self.client.api.post(uri, json=params)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] in [400, 403]:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+
+    def update_on_device(self):
+        params = self.changes.api_params()
+        if not params:
+            return False
+
+        uri = 'https://{0}:{1}/mgmt/tm/auth/tacacs/~Common~system-auth'.format(
+            self.client.provider['server'],
+            self.client.provider['server_port']
+        )
+
+        resp = self.client.api.patch(uri, json=params)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        return True
+
+    def remove_from_device(self):
+        uri = "https://{0}:{1}/mgmt/tm/auth/tacacs/~Common~system-auth".format(
+            self.client.provider['server'],
+            self.client.provider['server_port']
+        )
+        resp = self.client.api.delete(uri)
+        if resp.status == 200:
+            return True
+        raise F5ModuleError(resp.content)
+
+    def read_current_from_device(self):
+        uri = "https://{0}:{1}/mgmt/tm/auth/tacacs/~Common~system-auth".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        response['auth_source'] = self.read_current_auth_source_from_device()
+        return self.get_api_parameters(params=response)
+
+
+class ModuleManager(object):
+    def __init__(self, *args, **kwargs):
+        self.module = kwargs.get('module', None)
+        self.client = kwargs.get('client', None)
+        self.kwargs = kwargs
+
+    def exec_module(self):
+        manager = self.get_manager(self.module.params['type'])
+        return manager.exec_module()
+
+    def get_manager(self, type):
+        if type == 'tacacs':
+            return TacacsManager(**self.kwargs)
+        elif type == 'local':
+            return LocalManager(**self.kwargs)
+        else:
+            raise F5ModuleError(
+                "The provided 'type' is unknown."
+            )
+
+
+class ArgumentSpec(object):
+    def __init__(self):
+        self.supports_check_mode = True
+        argument_spec = dict(
+            type=dict(
+                required=True,
+                choices=['local', 'tacacs']
+            ),
+            servers=dict(type='raw'),
+            secret=dict(no_log=True),
+            service_name=dict(
+                choices=[
+                    'slip', 'ppp', 'arap', 'shell', 'tty-daemon',
+                    'connection', 'system', 'firewall'
+                ]
+            ),
+            protocol_name=dict(
+                choices=[
+                    'lcp', 'ip', 'ipx', 'atalk', 'vines', 'lat',
+                    'xremote', 'tn3270', 'telnet', 'rlogin', 'pad',
+                    'vpdn', 'ftp', 'http', 'deccp', 'osicp', 'unknown'
+                ]
+            ),
+            authentication=dict(
+                choices=[
+                    'use-first-server',
+                    'use-all-servers'
+                ]
+            ),
+            use_for_auth=dict(type='bool'),
+            update_secret=dict(
+                choices=['always', 'on_create'],
+                default='always'
+            ),
+            state=dict(
+                default='present',
+                choices=['present', 'absent']
+            ),
+
+        )
+        self.argument_spec = {}
+        self.argument_spec.update(f5_argument_spec)
+        self.argument_spec.update(argument_spec)
+
+
+def main():
+    spec = ArgumentSpec()
+
+    module = AnsibleModule(
+        argument_spec=spec.argument_spec,
+        supports_check_mode=spec.supports_check_mode,
+    )
+
+    try:
+        client = F5RestClient(**module.params)
+        mm = ModuleManager(module=module, client=client)
+        results = mm.exec_module()
+        exit_json(module, results, client)
+    except F5ModuleError as ex:
+        fail_json(module, ex, client)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/test/units/modules/network/f5/test_bigip_device_auth.py b/test/units/modules/network/f5/test_bigip_device_auth.py
new file mode 100644
index 0000000000..1ab9068445
--- /dev/null
+++ b/test/units/modules/network/f5/test_bigip_device_auth.py
@@ -0,0 +1,131 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright: (c) 2018, F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import json
+import pytest
+import sys
+
+from nose.plugins.skip import SkipTest
+if sys.version_info < (2, 7):
+    raise SkipTest("F5 Ansible modules require Python >= 2.7")
+
+from ansible.compat.tests import unittest
+from ansible.compat.tests.mock import Mock
+from ansible.compat.tests.mock import patch
+from ansible.module_utils.basic import AnsibleModule
+
+try:
+    from library.modules.bigip_device_auth import TacacsApiParameters
+    from library.modules.bigip_device_auth import TacacsModuleParameters
+    from library.modules.bigip_device_auth import TacacsManager
+    from library.modules.bigip_device_auth import ModuleManager
+    from library.modules.bigip_device_auth import ArgumentSpec
+    from library.module_utils.network.f5.common import F5ModuleError
+    from test.unit.modules.utils import set_module_args
+except ImportError:
+    try:
+        from ansible.modules.network.f5.bigip_sys_auth import TacacsApiParameters
+        from ansible.modules.network.f5.bigip_sys_auth import TacacsModuleParameters
+        from ansible.modules.network.f5.bigip_sys_auth import TacacsManager
+        from ansible.modules.network.f5.bigip_sys_auth import ModuleManager
+        from ansible.modules.network.f5.bigip_sys_auth import ArgumentSpec
+        from ansible.module_utils.network.f5.common import F5ModuleError
+        from units.modules.utils import set_module_args
+    except ImportError:
+        raise SkipTest("F5 Ansible modules require the f5-sdk Python library")
+
+fixture_path = os.path.join(os.path.dirname(__file__), 'fixtures')
+fixture_data = {}
+
+
+def load_fixture(name):
+    path = os.path.join(fixture_path, name)
+
+    if path in fixture_data:
+        return fixture_data[path]
+
+    with open(path) as f:
+        data = f.read()
+
+    try:
+        data = json.loads(data)
+    except Exception:
+        pass
+
+    fixture_data[path] = data
+    return data
+
+
+class TestParameters(unittest.TestCase):
+    def test_module_parameters(self):
+        args = dict(
+            type="tacacs",
+            authentication="use-all-servers",
+            protocol_name="ip",
+            secret="$XXXXXXXXXXXXXXXXXXXX==",
+            servers=['10.10.10.10', '10.10.10.11'],
+            service_name="ppp",
+            use_for_auth=True,
+            update_secret="on_create",
+        )
+        p = TacacsModuleParameters(params=args)
+        assert p.type == 'tacacs'
+        assert p.authentication == 'use-all-servers'
+
+    def test_api_parameters(self):
+        args = load_fixture('load_tm_auth_tacacs_1.json')
+        p = TacacsApiParameters(params=args)
+        assert p.authentication == 'use-first-server'
+        assert p.protocol_name == 'ftp'
+        assert p.secret == 'secret'
+        assert p.servers == ['11.11.11.11']
+        assert p.service_name == 'ppp'
+
+
+@patch('ansible.module_utils.f5_utils.AnsibleF5Client._get_mgmt_root',
+       return_value=True)
+class TestManager(unittest.TestCase):
+
+    def setUp(self):
+        self.spec = ArgumentSpec()
+
+    def test_create(self, *args):
+        set_module_args(dict(
+            type="tacacs",
+            authentication="use-all-servers",
+            protocol_name="ip",
+            secret="secret",
+            servers=['10.10.10.10', '10.10.10.11'],
+            service_name="ppp",
+            use_for_auth=True,
+            update_secret="on_create",
+            state='present',
+            provider=dict(
+                password='admin',
+                server='localhost',
+                user='admin'
+            )
+        ))
+
+        module = AnsibleModule(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode
+        )
+
+        # Override methods to force specific logic in the module to happen
+        m1 = TacacsManager(module=module)
+        m1.exists = Mock(return_value=False)
+        m1.create_on_device = Mock(return_value=True)
+        m1.update_auth_source_on_device = Mock(return_value=True)
+
+        mm = ModuleManager(module=module)
+        mm.get_manager = Mock(return_value=m1)
+
+        results = mm.exec_module()
+        assert results['changed'] is True