diff --git a/manifests/networks.pp b/manifests/networks.pp
index e7636379..716bc63c 100644
--- a/manifests/networks.pp
+++ b/manifests/networks.pp
@@ -3,7 +3,9 @@
 # @param networks
 #
 class docker::networks (
-  $networks
+  Optional[Hash[String, Hash]] $networks = undef,
 ) {
-  create_resources(docker_network, $networks)
+  if $networks {
+    create_resources(docker_network, $networks)
+  }
 }
diff --git a/spec/classes/networks_spec.rb b/spec/classes/networks_spec.rb
index 53ec2298..2eba6019 100644
--- a/spec/classes/networks_spec.rb
+++ b/spec/classes/networks_spec.rb
@@ -61,8 +61,14 @@
               'ip_range' => params['ip_range'],
             )
           }
+
+          it { is_expected.to have_docker_network_resource_count(1) }
         end
       end
+
+      context 'with no params' do
+        it { is_expected.to have_docker_network_resource_count(0) }
+      end
     end
   end
 end