diff --git a/src/pocketmine/tile/Bed.php b/src/pocketmine/tile/Bed.php
index 4299ec9fb..fb1351f72 100644
--- a/src/pocketmine/tile/Bed.php
+++ b/src/pocketmine/tile/Bed.php
@@ -35,7 +35,7 @@ class Bed extends Spawnable{
 	const TAG_COLOR = "color";
 
 	public function __construct(Level $level, CompoundTag $nbt){
-		if(!($nbt->getTag(self::TAG_COLOR) instanceof ByteTag)){
+		if(!$nbt->hasTag(self::TAG_COLOR, ByteTag::class)){
 			$nbt->setTag(new ByteTag(self::TAG_COLOR, 14)); //default to old red
 		}
 		parent::__construct($level, $nbt);
diff --git a/src/pocketmine/tile/Chest.php b/src/pocketmine/tile/Chest.php
index 84d5b6e51..a2f31931d 100644
--- a/src/pocketmine/tile/Chest.php
+++ b/src/pocketmine/tile/Chest.php
@@ -51,7 +51,7 @@ class Chest extends Spawnable implements InventoryHolder, Container, Nameable{
 		parent::__construct($level, $nbt);
 		$this->inventory = new ChestInventory($this);
 
-		if(!($this->namedtag->getTag("Items") instanceof ListTag)){
+		if(!$this->namedtag->hasTag("Items", ListTag::class)){
 			$this->namedtag->setTag(new ListTag("Items", [], NBT::TAG_Compound));
 		}
 
diff --git a/src/pocketmine/tile/FlowerPot.php b/src/pocketmine/tile/FlowerPot.php
index 79dba4145..0ae6a58dd 100644
--- a/src/pocketmine/tile/FlowerPot.php
+++ b/src/pocketmine/tile/FlowerPot.php
@@ -37,10 +37,10 @@ class FlowerPot extends Spawnable{
 	const TAG_ITEM_DATA = "mData";
 
 	public function __construct(Level $level, CompoundTag $nbt){
-		if(!($nbt->getTag(self::TAG_ITEM) instanceof ShortTag)){
+		if(!$nbt->hasTag(self::TAG_ITEM, ShortTag::class)){
 			$nbt->setTag(new ShortTag(self::TAG_ITEM, 0));
 		}
-		if(!($nbt->getTag(self::TAG_ITEM_DATA) instanceof IntTag)){
+		if(!$nbt->hasTag(self::TAG_ITEM_DATA, IntTag::class)){
 			$nbt->setTag(new IntTag(self::TAG_ITEM_DATA, 0));
 		}
 		parent::__construct($level, $nbt);
diff --git a/src/pocketmine/tile/Furnace.php b/src/pocketmine/tile/Furnace.php
index ffe4112a7..4730d7da8 100644
--- a/src/pocketmine/tile/Furnace.php
+++ b/src/pocketmine/tile/Furnace.php
@@ -53,24 +53,24 @@ class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
 	protected $inventory;
 
 	public function __construct(Level $level, CompoundTag $nbt){
-		if(!($nbt->getTag(self::TAG_BURN_TIME) instanceof ShortTag) or $nbt->getShort(self::TAG_BURN_TIME) < 0){
+		if(!$nbt->hasTag(self::TAG_BURN_TIME, ShortTag::class) or $nbt->getShort(self::TAG_BURN_TIME) < 0){
 			$nbt->setTag(new ShortTag(self::TAG_BURN_TIME, 0));
 		}
 
-		if(!
-			($nbt->getTag(self::TAG_COOK_TIME) instanceof ShortTag) or
+		if(
+			!$nbt->hasTag(self::TAG_COOK_TIME, ShortTag::class) or
 			$nbt->getShort(self::TAG_COOK_TIME) < 0 or
 			($nbt->getShort(self::TAG_BURN_TIME) === 0 and $nbt->getShort(self::TAG_COOK_TIME) > 0)
 		){
 			$nbt->setTag(new ShortTag(self::TAG_COOK_TIME, 0));
 		}
 
-		if(!($nbt->getTag(self::TAG_MAX_TIME) instanceof ShortTag)){
+		if(!$nbt->hasTag(self::TAG_MAX_TIME, ShortTag::class)){
 			$nbt->setTag(new ShortTag(self::TAG_MAX_TIME, $nbt->getShort(self::TAG_BURN_TIME)));
 			$nbt->removeTag(self::TAG_BURN_TICKS);
 		}
 
-		if(!($nbt->getTag(self::TAG_BURN_TICKS) instanceof ShortTag)){
+		if(!$nbt->getTag(self::TAG_BURN_TICKS, ShortTag::class)){
 			$nbt->setTag(new ShortTag(self::TAG_BURN_TICKS, 0));
 		}
 
diff --git a/src/pocketmine/tile/ItemFrame.php b/src/pocketmine/tile/ItemFrame.php
index dc5902cf8..5c6e3396e 100644
--- a/src/pocketmine/tile/ItemFrame.php
+++ b/src/pocketmine/tile/ItemFrame.php
@@ -38,11 +38,11 @@ class ItemFrame extends Spawnable{
 	const TAG_ITEM = "Item";
 
 	public function __construct(Level $level, CompoundTag $nbt){
-		if(!($nbt->getTag(self::TAG_ITEM_ROTATION) instanceof ByteTag)){
+		if(!$nbt->hasTag(self::TAG_ITEM_ROTATION, ByteTag::class)){
 			$nbt->setTag(new ByteTag(self::TAG_ITEM_ROTATION, 0));
 		}
 
-		if(!($nbt->getTag(self::TAG_ITEM_DROP_CHANCE) instanceof FloatTag)){
+		if(!$nbt->hasTag(self::TAG_ITEM_DROP_CHANCE, FloatTag::class)){
 			$nbt->setTag(new FloatTag(self::TAG_ITEM_DROP_CHANCE, 1.0));
 		}
 
diff --git a/src/pocketmine/tile/Sign.php b/src/pocketmine/tile/Sign.php
index 65c7a59be..5c4f13106 100644
--- a/src/pocketmine/tile/Sign.php
+++ b/src/pocketmine/tile/Sign.php
@@ -41,14 +41,14 @@ class Sign extends Spawnable{
 	protected $text = ["", "", "", ""];
 
 	public function __construct(Level $level, CompoundTag $nbt){
-		if($nbt->getTag(self::TAG_TEXT_BLOB) instanceof StringTag){ //MCPE 1.2 save format
+		if($nbt->hasTag(self::TAG_TEXT_BLOB, StringTag::class)){ //MCPE 1.2 save format
 			$this->text = explode("\n", $nbt->getString(self::TAG_TEXT_BLOB));
 			assert(count($this->text) === 4, "Too many lines!");
 			$nbt->removeTag(self::TAG_TEXT_BLOB);
 		}else{
 			for($i = 1; $i <= 4; ++$i){
 				$textKey = sprintf(self::TAG_TEXT_LINE, $i);
-				if($nbt->getTag($textKey) instanceof StringTag){
+				if($nbt->hasTag($textKey, StringTag::class)){
 					$this->text[$i - 1] = $nbt->getString($textKey);
 					$nbt->removeTag($textKey);
 				}
@@ -140,8 +140,8 @@ class Sign extends Spawnable{
 			return false;
 		}
 
-		if(($blob = $nbt->getString(self::TAG_TEXT_BLOB)) !== null){
-			$lines = array_pad(explode("\n", $blob), 4, "");
+		if($nbt->hasTag(self::TAG_TEXT_BLOB, StringTag::class)){
+			$lines = array_pad(explode("\n", $nbt->getString(self::TAG_TEXT_BLOB)), 4, "");
 		}else{
 			$lines = [
 				$nbt->getString(sprintf(self::TAG_TEXT_LINE, 1)),
diff --git a/src/pocketmine/tile/Skull.php b/src/pocketmine/tile/Skull.php
index 486008ad0..fa6b30c1e 100644
--- a/src/pocketmine/tile/Skull.php
+++ b/src/pocketmine/tile/Skull.php
@@ -42,10 +42,10 @@ class Skull extends Spawnable{
 	const TAG_ROT = "Rot";
 
 	public function __construct(Level $level, CompoundTag $nbt){
-		if(!($nbt->getTag(self::TAG_SKULL_TYPE) instanceof ByteTag)){
+		if(!$nbt->hasTag(self::TAG_SKULL_TYPE, ByteTag::class)){
 			$nbt->setTag(new ByteTag(self::TAG_SKULL_TYPE, 0));
 		}
-		if(!($nbt->getTag(self::TAG_ROT) instanceof ByteTag)){
+		if(!$nbt->hasTag(self::TAG_ROT, ByteTag::class)){
 			$nbt->setTag(new ByteTag(self::TAG_ROT, 0));
 		}
 		parent::__construct($level, $nbt);