diff --git a/packages/backend-test-utils/src/services/MockSchedulerService.test.ts b/packages/backend-test-utils/src/services/MockSchedulerService.test.ts
index 8e26fd770e..87390520b0 100644
--- a/packages/backend-test-utils/src/services/MockSchedulerService.test.ts
+++ b/packages/backend-test-utils/src/services/MockSchedulerService.test.ts
@@ -205,4 +205,39 @@ describe('MockSchedulerService', () => {
     expect(taskFn).toHaveBeenCalled();
     await expect(isDone()).resolves.toBe(true);
   });
+
+  it('should abort tasks when shutting down', async () => {
+    let taskSignal: AbortSignal | undefined;
+
+    const backend = await startTestBackend({
+      features: [
+        mockServices.scheduler.factory({
+          includeManualTasksOnStartup: true,
+          includeInitialDelayedTasksOnStartup: true,
+        }),
+        createBackendPlugin({
+          pluginId: 'tester',
+          register(reg) {
+            reg.registerInit({
+              deps: { scheduler: coreServices.scheduler },
+              async init({ scheduler }) {
+                scheduler.scheduleTask({
+                  ...baseOpts,
+                  id: 'test-plain',
+                  fn: async signal => {
+                    taskSignal = signal;
+                  },
+                });
+              },
+            });
+          },
+        }),
+      ],
+    });
+
+    expect(taskSignal).toBeDefined();
+    expect(taskSignal?.aborted).toBe(false);
+    await backend.stop();
+    expect(taskSignal?.aborted).toBe(true);
+  });
 });
diff --git a/packages/backend-test-utils/src/services/MockSchedulerService.ts b/packages/backend-test-utils/src/services/MockSchedulerService.ts
index 7648770eb5..ec02748e79 100644
--- a/packages/backend-test-utils/src/services/MockSchedulerService.ts
+++ b/packages/backend-test-utils/src/services/MockSchedulerService.ts
@@ -31,6 +31,7 @@ export class MockSchedulerService implements SchedulerService {
     SchedulerServiceTaskInvocationDefinition &
       SchedulerServiceTaskScheduleDefinition & {
         descriptor: SchedulerServiceTaskDescriptor;
+        abortControllers: AbortController[];
       }
   >();
   readonly #runningTasks = new Set<string>();
@@ -57,6 +58,9 @@ export class MockSchedulerService implements SchedulerService {
             });
           });
         }
+        lifecycle.addShutdownHook(async () => {
+          await this.#shutdownAllTasks();
+        });
         return this;
       },
     });
@@ -87,6 +91,7 @@ export class MockSchedulerService implements SchedulerService {
         scope: task.scope ?? 'global',
         settings: { version: 1 },
       },
+      abortControllers: [],
     });
   }
 
@@ -100,7 +105,9 @@ export class MockSchedulerService implements SchedulerService {
     }
     this.#runningTasks.add(id);
     try {
-      await task.fn(new AbortController().signal);
+      const abortController = new AbortController();
+      task.abortControllers.push(abortController);
+      await task.fn(abortController.signal);
       this.#deferredTaskCompletions.get(id)?.resolve();
     } catch (error) {
       this.#deferredTaskCompletions.get(id)?.reject(error);
@@ -144,6 +151,14 @@ export class MockSchedulerService implements SchedulerService {
     await Promise.all(selectedTaskIds.map(id => this.triggerTask(id)));
   }
 
+  async #shutdownAllTasks() {
+    for (const task of this.#tasks.values()) {
+      for (const abortController of task.abortControllers) {
+        abortController.abort();
+      }
+    }
+  }
+
   /**
    * Wait for the task with the given ID to complete.
    *