diff --git a/inventories/default.nix b/inventories/default.nix
index 28dec79..6175453 100644
--- a/inventories/default.nix
+++ b/inventories/default.nix
@@ -5,6 +5,8 @@
       tags = {
         glom = [ "vega" ];
         b4l = [ "rigel" ];
+
+        fax-bridge = [ "b4l" ];
       };
 
       instances = {
@@ -48,6 +50,14 @@
           roles.peer.tags.b4l = { };
         };
 
+        yggdrasil = {
+          module = {
+            name = "yggdrasil";
+            input = "self";
+          };
+          roles.default.tags."fax-bridge" = { };
+        };
+
         pocket-id = {
           module = {
             name = "pocket-id";
diff --git a/modules/clan/yggdrasil/tests/vm/default.nix b/modules/clan/yggdrasil/tests/vm/default.nix
index e69de29..ffcd441 100644
--- a/modules/clan/yggdrasil/tests/vm/default.nix
+++ b/modules/clan/yggdrasil/tests/vm/default.nix
@@ -0,0 +1 @@
+{ }