diff --git a/tests/__init__.py b/tests/__init__.py
index 0f3dc9eb9..8b898a009 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -91,18 +91,23 @@ def get_mock_iface(bus: dbus.Bus, bus_name: Optional[str] = None):
     return dbus.Interface(obj, dbusmock.MOCK_IFACE)
 
 
-def portal_interface_name(portal_name) -> str:
+def portal_interface_name(portal_name, domain: Optional[str] = None) -> str:
     """
     Returns the fully qualified interface for a portal name.
     """
-    return f"org.freedesktop.portal.{portal_name}"
+    if domain:
+        return f"org.freedesktop.{domain}.portal.{portal_name}"
+    else:
+        return f"org.freedesktop.portal.{portal_name}"
 
 
-def get_portal_iface(bus: dbus.Bus, name: str) -> dbus.Interface:
+def get_portal_iface(
+    bus: dbus.Bus, name: str, domain: Optional[str] = None
+) -> dbus.Interface:
     """
     Returns the dbus interface for a portal name.
     """
-    name = portal_interface_name(name)
+    name = portal_interface_name(name, domain)
     return get_iface(bus, name)
 
 
@@ -139,14 +144,16 @@ def get_xdp_dbus_object(bus: dbus.Bus) -> dbus.proxies.ProxyObject:
     return obj
 
 
-def check_version(bus: dbus.Bus, portal_name: str, expected_version: int):
+def check_version(
+    bus: dbus.Bus, portal_name: str, expected_version: int, domain: Optional[str] = None
+):
     """
     Checks that the portal_name portal version is equal to expected_version.
     """
     properties_intf = dbus.Interface(
         get_xdp_dbus_object(bus), "org.freedesktop.DBus.Properties"
     )
-    portal_iface_name = portal_interface_name(portal_name)
+    portal_iface_name = portal_interface_name(portal_name, domain)
     try:
         portal_version = properties_intf.Get(portal_iface_name, "version")
         assert int(portal_version) == expected_version
diff --git a/tests/templates/__init__.py b/tests/templates/__init__.py
index 466ee35f7..ea9fc2f3b 100644
--- a/tests/templates/__init__.py
+++ b/tests/templates/__init__.py
@@ -142,9 +142,11 @@ def __init__(
         mock: dbusmock.DBusMockObject,
         busname: str,
         handle: str,
+        app_id: str,
     ):
         self.mock = mock  # the main mock object
         self.handle = handle
+        self.app_id = app_id
         self.closed = False
         self._close_callback: Optional[Callable] = None
 
diff --git a/tests/templates/globalshortcuts.py b/tests/templates/globalshortcuts.py
index cda286445..e028786ee 100644
--- a/tests/templates/globalshortcuts.py
+++ b/tests/templates/globalshortcuts.py
@@ -49,7 +49,7 @@ def CreateSession(self, handle, session_handle, app_id, options, cb_success, cb_
     try:
         logger.debug(f"CreateSession({handle}, {session_handle}, {app_id}, {options})")
 
-        session = ImplSession(self, BUS_NAME, session_handle).export()
+        session = ImplSession(self, BUS_NAME, session_handle, app_id).export()
         self.sessions[session_handle] = session
 
         response = Response(self.response, {"session_handle": session.handle})
diff --git a/tests/templates/inhibit.py b/tests/templates/inhibit.py
index 11a239d5c..dee67089a 100644
--- a/tests/templates/inhibit.py
+++ b/tests/templates/inhibit.py
@@ -116,7 +116,7 @@ def CreateMonitor(self, handle, session_handle, app_id, window, cb_success, cb_e
     try:
         logger.debug(f"CreateMonitor({handle}, {session_handle}, {app_id}, {window})")
 
-        session = ImplSession(self, BUS_NAME, session_handle).export()
+        session = ImplSession(self, BUS_NAME, session_handle, app_id).export()
         self.sessions[session_handle] = session
 
         def closed_callback():
diff --git a/tests/templates/remotedesktop.py b/tests/templates/remotedesktop.py
index 9c2351734..f6669af54 100644
--- a/tests/templates/remotedesktop.py
+++ b/tests/templates/remotedesktop.py
@@ -52,7 +52,7 @@ def CreateSession(self, handle, session_handle, app_id, options, cb_success, cb_
     try:
         logger.debug(f"CreateSession({handle}, {session_handle}, {app_id}, {options})")
 
-        session = ImplSession(self, BUS_NAME, session_handle).export()
+        session = ImplSession(self, BUS_NAME, session_handle, app_id).export()
         self.sessions[session_handle] = session
 
         response = Response(self.response, {"session_handle": session.handle})