PHP Unit testing very slow

Hello, Quick question: my Unit tests are working fine. But I needed to clear some stuff after tests. But I noticed that my tests became VERRRRRRRY long whenever I added the tearDown() method. I tried to simplify the tearDown() actions until I simply cleared out the method:

	public function tearDown():void {
		//Cashier::stripe()->customers->delete($this->user->stripe_id);
		//echo 'BYE';
	}

It seems that even empty the tearDown is slowing down tests : I waited 5 minutes to complete and I didn't go through when it usually takes 30/45s without tearDown. Has anyone noticed such behavior? Thanks