diff --git a/src/event/HandlerList.php b/src/event/HandlerList.php
index b135a53cd..71b159ca5 100644
--- a/src/event/HandlerList.php
+++ b/src/event/HandlerList.php
@@ -65,11 +65,11 @@ class HandlerList{
 	 * @param RegisteredListener|Listener|Plugin $object
 	 */
 	public function unregister($object) : void{
-		if($object instanceof Plugin or $object instanceof Listener){
+		if($object instanceof Plugin || $object instanceof Listener){
 			foreach($this->handlerSlots as $priority => $list){
 				foreach($list as $hash => $listener){
-					if(($object instanceof Plugin and $listener->getPlugin() === $object)
-						or ($object instanceof Listener and (new \ReflectionFunction($listener->getHandler()))->getClosureThis() === $object) //this doesn't even need to be a listener :D
+					if(($object instanceof Plugin && $listener->getPlugin() === $object)
+						|| ($object instanceof Listener && (new \ReflectionFunction($listener->getHandler()))->getClosureThis() === $object) //this doesn't even need to be a listener :D
 					){
 						unset($this->handlerSlots[$priority][$hash]);
 					}
diff --git a/src/event/HandlerListManager.php b/src/event/HandlerListManager.php
index 0859b1e5e..864b639d7 100644
--- a/src/event/HandlerListManager.php
+++ b/src/event/HandlerListManager.php
@@ -45,7 +45,7 @@ class HandlerListManager{
 	 * @param Plugin|Listener|RegisteredListener|null $object
 	 */
 	public function unregisterAll($object = null) : void{
-		if($object instanceof Listener or $object instanceof Plugin or $object instanceof RegisteredListener){
+		if($object instanceof Listener || $object instanceof Plugin || $object instanceof RegisteredListener){
 			foreach($this->allLists as $h){
 				$h->unregister($object);
 			}
diff --git a/src/event/RegisteredListener.php b/src/event/RegisteredListener.php
index cc22a0511..d0732bc99 100644
--- a/src/event/RegisteredListener.php
+++ b/src/event/RegisteredListener.php
@@ -68,7 +68,7 @@ class RegisteredListener{
 	}
 
 	public function callEvent(Event $event) : void{
-		if($event instanceof Cancellable and $event->isCancelled() and !$this->isHandlingCancelled()){
+		if($event instanceof Cancellable && $event->isCancelled() && !$this->isHandlingCancelled()){
 			return;
 		}
 		$this->timings->startTiming();