diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 2623f7cb2409..de00b68f3b87 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -676,7 +676,7 @@ in {
   ly = handleTest ./ly.nix {};
   maddy = discoverTests (import ./maddy { inherit handleTest; });
   maestral = handleTest ./maestral.nix {};
-  magic-wormhole-mailbox-server = handleTest ./magic-wormhole-mailbox-server.nix {};
+  magic-wormhole-mailbox-server = runTest ./magic-wormhole-mailbox-server.nix;
   magnetico = handleTest ./magnetico.nix {};
   mailcatcher = runTest ./mailcatcher.nix;
   mailhog = handleTest ./mailhog.nix {};
diff --git a/nixos/tests/magic-wormhole-mailbox-server.nix b/nixos/tests/magic-wormhole-mailbox-server.nix
index c6979db791f2..baf6d54564fb 100644
--- a/nixos/tests/magic-wormhole-mailbox-server.nix
+++ b/nixos/tests/magic-wormhole-mailbox-server.nix
@@ -1,47 +1,39 @@
-import ./make-test-python.nix (
-  { pkgs, ... }:
-  {
-    name = "magic-wormhole-mailbox-server";
-    meta = with pkgs.lib.maintainers; {
-      maintainers = [ mmahut ];
+{ lib, ... }:
+{
+  name = "magic-wormhole-mailbox-server";
+  meta.maintainers = [ lib.maintainers.mmahut ];
+
+  nodes = {
+    server = {
+      networking.firewall.allowedTCPPorts = [ 4000 ];
+      services.magic-wormhole-mailbox-server.enable = true;
     };
+    client_alice =
+      { pkgs, ... }:
+      {
+        networking.firewall.enable = false;
+        environment.systemPackages = [ pkgs.magic-wormhole ];
+      };
+    client_bob =
+      { pkgs, ... }:
+      {
+        environment.systemPackages = [ pkgs.magic-wormhole ];
+      };
+  };
 
-    nodes = {
-      server =
-        { ... }:
-        {
-          networking.firewall.allowedTCPPorts = [ 4000 ];
-          services.magic-wormhole-mailbox-server.enable = true;
-        };
+  testScript = ''
+    start_all()
 
-      client_alice =
-        { ... }:
-        {
-          networking.firewall.enable = false;
-          environment.systemPackages = [ pkgs.magic-wormhole ];
-        };
+    # Start the wormhole relay server
+    server.wait_for_unit("magic-wormhole-mailbox-server.service")
+    server.wait_for_open_port(4000)
 
-      client_bob =
-        { ... }:
-        {
-          environment.systemPackages = [ pkgs.magic-wormhole ];
-        };
-    };
+    # Create a secret file and send it to Bob
+    client_alice.succeed("echo mysecret > secretfile")
+    client_alice.succeed("wormhole --relay-url=ws://server:4000/v1 send -0 secretfile >&2 &")
 
-    testScript = ''
-      start_all()
-
-      # Start the wormhole relay server
-      server.wait_for_unit("magic-wormhole-mailbox-server.service")
-      server.wait_for_open_port(4000)
-
-      # Create a secret file and send it to Bob
-      client_alice.succeed("echo mysecret > secretfile")
-      client_alice.succeed("wormhole --relay-url=ws://server:4000/v1 send -0 secretfile >&2 &")
-
-      # Retrieve a secret file from Alice and check its content
-      client_bob.succeed("wormhole --relay-url=ws://server:4000/v1 receive -0 --accept-file")
-      client_bob.succeed("grep mysecret secretfile")
-    '';
-  }
-)
+    # Retrieve a secret file from Alice and check its content
+    client_bob.succeed("wormhole --relay-url=ws://server:4000/v1 receive -0 --accept-file")
+    client_bob.succeed("grep mysecret secretfile")
+  '';
+}