diff --git a/ydb/core/testlib/actors/test_runtime.cpp b/ydb/core/testlib/actors/test_runtime.cpp
index 22201081f16f..645a9368b69e 100644
--- a/ydb/core/testlib/actors/test_runtime.cpp
+++ b/ydb/core/testlib/actors/test_runtime.cpp
@@ -23,10 +23,11 @@
 namespace NActors {
 
     void TTestActorRuntime::TNodeData::Stop() {
-        TNodeDataBase::Stop();
         if (Mon) {
             Mon->Stop();
+            GetAppData<NKikimr::TAppData>()->Mon = nullptr;
         }
+        TNodeDataBase::Stop();
     }
 
     TTestActorRuntime::TNodeData::~TNodeData() {