diff --git a/lib/puppet/provider/mistral.rb b/lib/puppet/provider/mistral.rb
index 5b8fe9e..6d5557b 100644
--- a/lib/puppet/provider/mistral.rb
+++ b/lib/puppet/provider/mistral.rb
@@ -1,4 +1,3 @@
-require 'puppet/util/inifile'
 require 'puppet/provider/openstack/auth'
 require 'puppet/provider/openstack/credentials'
 require File.join(File.dirname(__FILE__), '..','..', 'puppet/provider/mistral_workflow_requester')
@@ -7,101 +6,4 @@ class Puppet::Provider::Mistral < Puppet::Provider::MistralWorkflowRequester
 
   extend Puppet::Provider::Openstack::Auth
 
-  def self.request(service, action, properties=nil)
-    begin
-      super
-    rescue Puppet::Error::OpenstackAuthInputError, Puppet::Error::OpenstackUnauthorizedError => error
-      mistral_request(service, action, error, properties)
-    end
-  end
-
-  def self.mistral_request(service, action, error, properties=nil)
-    warning('Usage of keystone_authtoken parameters is deprecated.')
-    properties ||= []
-    @credentials.username = mistral_credentials['username']
-    @credentials.password = mistral_credentials['password']
-    @credentials.project_name = mistral_credentials['project_name']
-    @credentials.auth_url = auth_endpoint
-    if mistral_credentials['region_name']
-      @credentials.region_name = mistral_credentials['region_name']
-    end
-    if @credentials.version == '3'
-      @credentials.user_domain_name = mistral_credentials['user_domain_name']
-      @credentials.project_domain_name = mistral_credentials['project_domain_name']
-    end
-    raise error unless @credentials.set?
-
-    if action == 'create'
-      mistral_create_request(action, properties)
-    else
-      Puppet::Provider::Openstack.request(service, action, properties, @credentials)
-    end
-  end
-
-  def self.conf_filename
-    '/etc/mistral/mistral.conf'
-  end
-
-  def self.mistral_conf
-    return @mistral_conf if @mistral_conf
-    @mistral_conf = Puppet::Util::IniConfig::File.new
-    @mistral_conf.read(conf_filename)
-    @mistral_conf
-  end
-
-  def self.mistral_credentials
-    @mistral_credentials ||= get_mistral_credentials
-  end
-
-  def mistral_credentials
-    self.class.mistral_credentials
-  end
-
-  def self.get_mistral_credentials
-    auth_keys = ['auth_url', 'project_name', 'username', 'password']
-    conf = mistral_conf
-    if conf and conf['keystone_authtoken'] and
-        auth_keys.all?{|k| !conf['keystone_authtoken'][k].nil?}
-      creds = Hash[ auth_keys.map \
-                   { |k| [k, conf['keystone_authtoken'][k].strip] } ]
-
-      if conf['project_domain_name']
-        creds['project_domain_name'] = conf['project_domain_name']
-      else
-        creds['project_domain_name'] = 'Default'
-      end
-
-      if conf['user_domain_name']
-        creds['user_domain_name'] = conf['user_domain_name']
-      else
-        creds['user_domain_name'] = 'Default'
-      end
-
-      if conf['region_name']
-        creds['region_name'] = conf['region_name']
-      end
-      return creds
-    else
-      raise(Puppet::Error, "File: #{conf_filename} does not contain all " +
-            "required authentication options. Mistral types will not work " +
-            "if mistral is not correctly configured to use Keystone " +
-            "authentication.")
-    end
-  end
-
-  def self.get_auth_endpoint
-    m = mistral_credentials
-    "#{m['auth_url']}"
-  end
-
-  def self.auth_endpoint
-    @auth_endpoint ||= get_auth_endpoint
-  end
-
-  def self.reset
-    @mistral_conf = nil
-    @mistral_credentials = nil
-    @auth_endpoint = nil
-  end
-
 end
diff --git a/metadata.json b/metadata.json
index b8e60cb..2398da6 100644
--- a/metadata.json
+++ b/metadata.json
@@ -30,7 +30,7 @@
         {
             "operatingsystem": "Debian",
             "operatingsystemrelease": [
-                "11"
+                "12"
             ]
         },
         {
diff --git a/spec/unit/provider/mistral_spec.rb b/spec/unit/provider/mistral_spec.rb
deleted file mode 100644
index 22c8763..0000000
--- a/spec/unit/provider/mistral_spec.rb
+++ /dev/null
@@ -1,48 +0,0 @@
-require 'puppet'
-require 'spec_helper'
-require 'puppet/provider/mistral'
-require 'tempfile'
-
-klass = Puppet::Provider::Mistral
-
-describe Puppet::Provider::Mistral do
-
-  after :each do
-    klass.reset
-  end
-
-  describe 'when retrieving the auth credentials' do
-
-    it 'should fail if no auth params are passed and the mistral config file does not have the expected contents' do
-      mock = {}
-      expect(Puppet::Util::IniConfig::File).to receive(:new).and_return(mock)
-      expect(mock).to receive(:read).with('/etc/mistral/mistral.conf')
-      expect do
-        klass.mistral_credentials
-      end.to raise_error(Puppet::Error, /Mistral types will not work/)
-    end
-
-    it 'should read conf file with all sections' do
-      creds_hash = {
-        'auth_url'            => 'https://192.168.56.210:5000/v3/',
-        'project_name'        => 'admin_tenant',
-        'username'            => 'admin',
-        'password'            => 'password',
-        'project_domain_name' => 'Default',
-        'user_domain_name'    => 'Default',
-      }
-      mock = {
-        'keystone_authtoken' => {
-          'auth_url'     => 'https://192.168.56.210:5000/v3/',
-          'project_name' => 'admin_tenant',
-          'username'     => 'admin',
-          'password'     => 'password',
-        }
-      }
-      expect(Puppet::Util::IniConfig::File).to receive(:new).and_return(mock)
-      expect(mock).to receive(:read).with('/etc/mistral/mistral.conf')
-      expect(klass.mistral_credentials).to eq(creds_hash)
-    end
-
-  end
-end