diff --git a/src/classes/worker.ts b/src/classes/worker.ts
index acc6f1d533..f9a2ce34ce 100644
--- a/src/classes/worker.ts
+++ b/src/classes/worker.ts
@@ -1042,7 +1042,6 @@ will never work with more accuracy than 1ms. */
           }
 
           clearTimeout(this.extendLocksTimer);
-          //clearTimeout(this.stalledCheckTimer);
           this.stalledCheckStopper?.();
 
           this.closed = true;
@@ -1249,6 +1248,7 @@ will never work with more accuracy than 1ms. */
           this.emit('stalled', jobId, 'active');
         });
 
+        // Todo: check if there any listeners on failed event
         const jobPromises: Promise<Job<DataType, ResultType, NameType>>[] = [];
         for (let i = 0; i < failed.length; i++) {
           jobPromises.push(
diff --git a/tests/test_job_scheduler.ts b/tests/test_job_scheduler.ts
index f0f8ad5e4d..b676e711f4 100644
--- a/tests/test_job_scheduler.ts
+++ b/tests/test_job_scheduler.ts
@@ -1403,6 +1403,247 @@ describe('Job Scheduler', function () {
     });
   });
 
+  describe('when repeatable job fails', async function () {
+    it('should continue repeating', async function () {
+      const repeatOpts = {
+        pattern: '0 * 1 * *',
+      };
+
+      const worker = new Worker(
+        queueName,
+        async () => {
+          throw new Error('failed');
+        },
+        {
+          connection,
+          prefix,
+        },
+      );
+
+      const failing = new Promise<void>(resolve => {
+        worker.on('failed', () => {
+          resolve();
+        });
+      });
+
+      const repeatableJob = await queue.upsertJobScheduler('test', repeatOpts);
+      const delayedCount = await queue.getDelayedCount();
+      expect(delayedCount).to.be.equal(1);
+
+      await repeatableJob!.promote();
+      await failing;
+
+      const failedCount = await queue.getFailedCount();
+      expect(failedCount).to.be.equal(1);
+
+      const delayedCount2 = await queue.getDelayedCount();
+      expect(delayedCount2).to.be.equal(1);
+
+      const configs = await repeat.getRepeatableJobs(0, -1, true);
+
+      expect(delayedCount).to.be.equal(1);
+
+      const count = await queue.count();
+
+      expect(count).to.be.equal(1);
+      expect(configs).to.have.length(1);
+      await worker.close();
+    });
+
+    it('should not create a new delayed job if the failed job is retried with retryJobs', async function () {
+      const repeatOpts = {
+        every: 579,
+      };
+
+      const worker = new Worker(
+        queueName,
+        async () => {
+          this.clock.tick(177);
+          throw new Error('failed');
+        },
+        {
+          connection,
+          prefix,
+        },
+      );
+
+      const failing = new Promise<void>(resolve => {
+        worker.on('failed', async () => {
+          resolve();
+        });
+      });
+
+      const repeatableJob = await queue.upsertJobScheduler('test', repeatOpts);
+      const delayedCount = await queue.getDelayedCount();
+      expect(delayedCount).to.be.equal(1);
+
+      await repeatableJob!.promote();
+      await failing;
+
+      const failedCount = await queue.getFailedCount();
+      expect(failedCount).to.be.equal(1);
+
+      // Retry the failed job
+      this.clock.tick(1143);
+      await queue.retryJobs({ state: 'failed' });
+      const failedCountAfterRetry = await queue.getFailedCount();
+      expect(failedCountAfterRetry).to.be.equal(0);
+
+      const delayedCount2 = await queue.getDelayedCount();
+      expect(delayedCount2).to.be.equal(1);
+    });
+
+    it('should not create a new delayed job if the failed job is retried with Job.retry()', async function () {
+      const repeatOpts = {
+        every: 477,
+      };
+
+      const worker = new Worker(
+        queueName,
+        async () => {
+          this.clock.tick(177);
+          throw new Error('failed');
+        },
+        {
+          connection,
+          prefix,
+        },
+      );
+
+      const failing = new Promise<void>(resolve => {
+        worker.on('failed', async () => {
+          resolve();
+        });
+      });
+
+      const repeatableJob = await queue.upsertJobScheduler('test', repeatOpts);
+      const delayedCount = await queue.getDelayedCount();
+      expect(delayedCount).to.be.equal(1);
+
+      await repeatableJob!.promote();
+
+      this.clock.tick(177);
+
+      await failing;
+
+      this.clock.tick(177);
+
+      const failedJobs = await queue.getFailed();
+      expect(failedJobs.length).to.be.equal(1);
+
+      // Retry the failed job
+      const failedJob = await queue.getJob(failedJobs[0].id);
+      await failedJob!.retry();
+      const failedCountAfterRetry = await queue.getFailedCount();
+      expect(failedCountAfterRetry).to.be.equal(0);
+
+      const delayedCount2 = await queue.getDelayedCount();
+      expect(delayedCount2).to.be.equal(1);
+    });
+
+    it('should not create a new delayed job if the failed job is stalled and moved back to wait', async function () {
+      // Note, this test is expected to throw an exception like this:
+      // "Error: Missing lock for job repeat:test:1486455840000. moveToFinished"
+      const date = new Date('2017-02-07 9:24:00');
+      this.clock.setSystemTime(date);
+
+      const repeatOpts = {
+        every: 2000,
+      };
+
+      const repeatableJob = await queue.upsertJobScheduler('test', repeatOpts);
+      expect(repeatableJob).to.be.ok;
+
+      const delayedCount = await queue.getDelayedCount();
+      expect(delayedCount).to.be.equal(1);
+
+      await repeatableJob!.promote();
+
+      let resolveCompleting: () => void;
+      const complettingJob = new Promise<void>(resolve => {
+        resolveCompleting = resolve;
+      });
+
+      let worker: Worker;
+      const processing = new Promise<void>(resolve => {
+        worker = new Worker(
+          queueName,
+          async () => {
+            resolve();
+            return complettingJob;
+          },
+          {
+            connection,
+            prefix,
+            skipLockRenewal: true,
+            skipStalledCheck: true,
+          },
+        );
+      });
+
+      await processing;
+
+      // force remove the lock
+      const client = await queue.client;
+      const lockKey = `bull:${queueName}:${repeatableJob!.id}:lock`;
+      await client.del(lockKey);
+
+      const stalledCheckerKey = `bull:${queueName}:stalled-check`;
+      await client.del(stalledCheckerKey);
+
+      const scripts = (<any>worker!).scripts;
+      let [failed, stalled] = await scripts.moveStalledJobsToWait();
+
+      await client.del(stalledCheckerKey);
+
+      [failed, stalled] = await scripts.moveStalledJobsToWait();
+
+      const waitingJobs = await queue.getWaiting();
+      expect(waitingJobs.length).to.be.equal(1);
+
+      await this.clock.tick(500);
+
+      resolveCompleting!();
+      await worker!.close();
+
+      await this.clock.tick(500);
+
+      const delayedCount2 = await queue.getDelayedCount();
+      expect(delayedCount2).to.be.equal(1);
+
+      let completedJobs = await queue.getCompleted();
+      expect(completedJobs.length).to.be.equal(0);
+
+      const processing2 = new Promise<void>(resolve => {
+        worker = new Worker(
+          queueName,
+          async () => {
+            resolve();
+          },
+          {
+            connection,
+            prefix,
+            skipLockRenewal: true,
+            skipStalledCheck: true,
+          },
+        );
+      });
+
+      await processing2;
+
+      await worker!.close();
+
+      completedJobs = await queue.getCompleted();
+      expect(completedJobs.length).to.be.equal(1);
+
+      const waitingJobs2 = await queue.getWaiting();
+      expect(waitingJobs2.length).to.be.equal(0);
+
+      const delayedCount3 = await queue.getDelayedCount();
+      expect(delayedCount3).to.be.equal(1);
+    });
+  });
+
   it('should keep only one delayed job if adding a new repeatable job with the same id', async function () {
     const date = new Date('2017-02-07 9:24:00');
     const key = 'mykey';
diff --git a/tests/test_queue.ts b/tests/test_queue.ts
index 80bd41a92d..8b5ca6c3e7 100644
--- a/tests/test_queue.ts
+++ b/tests/test_queue.ts
@@ -37,6 +37,19 @@ describe('queues', function () {
     await connection.quit();
   });
 
+  describe('use generics', function () {
+    it('should be able to use generics', async function () {
+      const queue = new Queue<{ foo: string; bar: number }>('test', {
+        connection,
+      });
+      const job = await queue.add('test', { foo: 'bar', bar: 1 });
+      const job2 = await queue.getJob(job.id!);
+      expect(job2?.data.foo).to.be.eql('bar');
+      expect(job2?.data.bar).to.be.eql(1);
+      await queue.close();
+    });
+  });
+
   it('should return the queue version', async () => {
     const queue = new Queue(queueName, { connection });
     const version = await queue.getVersion();