diff --git a/packages/services/src/basemanager.ts b/packages/services/src/basemanager.ts
index 1438d2fc1692..22e75c9cd5a5 100644
--- a/packages/services/src/basemanager.ts
+++ b/packages/services/src/basemanager.ts
@@ -86,6 +86,7 @@ export abstract class BaseManager implements IManager {
     if (this.isDisposed) {
       return;
     }
+    this._isDisposed = true;
     this._disposed.emit(undefined);
     Signal.clearData(this);
   }
diff --git a/packages/services/test/kernelspec/manager.spec.ts b/packages/services/test/kernelspec/manager.spec.ts
index 8d9d8320138b..0c959e861aba 100644
--- a/packages/services/test/kernelspec/manager.spec.ts
+++ b/packages/services/test/kernelspec/manager.spec.ts
@@ -59,6 +59,17 @@ describe('kernel/manager', () => {
       });
     });
 
+    describe('#isDisposed', () => {
+      it('should be false when instantiating', () => {
+        expect(manager.isDisposed).toBe(false);
+      });
+
+      it('should true when disposing', () => {
+        manager.dispose();
+        expect(manager.isDisposed).toBe(true);
+      });
+    });
+
     describe('#serverSettings', () => {
       it('should get the server settings', () => {
         manager.dispose();