diff --git a/spec/type_aliases/servicedefault_spec.rb b/spec/type_aliases/servicedefault_spec.rb
new file mode 100644
index 00000000..f1bbbe6e
--- /dev/null
+++ b/spec/type_aliases/servicedefault_spec.rb
@@ -0,0 +1,33 @@
+require 'spec_helper'
+
+describe 'Openstacklib::ServiceDefault' do
+  describe 'valid types' do
+    context 'with valid types' do
+      [
+        '<SERVICE DEFAULT>',
+      ].each do |value|
+        describe value.inspect do
+          it { is_expected.to allow_value(value) }
+        end
+      end
+    end
+  end
+
+  describe 'invalid types' do
+    context 'with garbage inputs' do
+      [
+        'somethink',
+        true,
+        nil,
+        {},
+        '',
+        55555,
+      ].each do |value|
+        describe value.inspect do
+          it { is_expected.not_to allow_value(value) }
+        end
+      end
+    end
+  end
+end
+
diff --git a/types/servicedefault.pp b/types/servicedefault.pp
new file mode 100644
index 00000000..5008fd5d
--- /dev/null
+++ b/types/servicedefault.pp
@@ -0,0 +1 @@
+type Openstacklib::ServiceDefault = Enum['<SERVICE DEFAULT>']