diff --git a/studio/backend/tests/test_desktop_auth.py b/studio/backend/tests/test_desktop_auth.py
index af0a4b940f..12cf071141 100644
--- a/studio/backend/tests/test_desktop_auth.py
+++ b/studio/backend/tests/test_desktop_auth.py
@@ -423,6 +423,8 @@ def test_health_response_reports_desktop_capability_fields(monkeypatch):
     llama_module.router = APIRouter()
     prompts_module = ModuleType("routes.prompts")
     prompts_module.router = APIRouter()
+    preview_module = ModuleType("routes.preview")
+    preview_module.router = APIRouter()
 
     for name, router in {
         "auth_router": APIRouter(),
@@ -449,6 +451,7 @@ def test_health_response_reports_desktop_capability_fields(monkeypatch):
     monkeypatch.setitem(sys.modules, "routes.settings", settings_module)
     monkeypatch.setitem(sys.modules, "routes.llama", llama_module)
     monkeypatch.setitem(sys.modules, "routes.prompts", prompts_module)
+    monkeypatch.setitem(sys.modules, "routes.preview", preview_module)
 
     import studio.backend.main as backend_main