diff --git a/internal/mscs/msc2836/msc2836_test.go b/internal/mscs/msc2836/msc2836_test.go
index cbf8b726e..265d6ee67 100644
--- a/internal/mscs/msc2836/msc2836_test.go
+++ b/internal/mscs/msc2836/msc2836_test.go
@@ -457,6 +457,9 @@ func (u *testUserAPI) PerformDeviceDeletion(ctx context.Context, req *userapi.Pe
 func (u *testUserAPI) PerformDeviceUpdate(ctx context.Context, req *userapi.PerformDeviceUpdateRequest, res *userapi.PerformDeviceUpdateResponse) error {
 	return nil
 }
+func (u *testUserAPI) PerformLastSeenUpdate(ctx context.Context, req *userapi.PerformLastSeenUpdateRequest, res *userapi.PerformLastSeenUpdateResponse) error {
+	return nil
+}
 func (u *testUserAPI) PerformAccountDeactivation(ctx context.Context, req *userapi.PerformAccountDeactivationRequest, res *userapi.PerformAccountDeactivationResponse) error {
 	return nil
 }