diff --git a/src/pocketmine/item/ChorusFruit.php b/src/pocketmine/item/ChorusFruit.php
index d66192aa8..269bdcf30 100644
--- a/src/pocketmine/item/ChorusFruit.php
+++ b/src/pocketmine/item/ChorusFruit.php
@@ -27,7 +27,6 @@ use pocketmine\block\Liquid;
 use pocketmine\entity\Living;
 use pocketmine\level\sound\EndermanTeleportSound;
 use pocketmine\math\Vector3;
-use function assert;
 use function min;
 use function mt_rand;
 
diff --git a/src/pocketmine/level/Position.php b/src/pocketmine/level/Position.php
index 29832f54d..c0792559c 100644
--- a/src/pocketmine/level/Position.php
+++ b/src/pocketmine/level/Position.php
@@ -24,8 +24,8 @@ declare(strict_types=1);
 namespace pocketmine\level;
 
 use pocketmine\math\Vector3;
-use pocketmine\utils\MainLogger;
 use pocketmine\utils\AssumptionFailedError;
+use pocketmine\utils\MainLogger;
 use function assert;
 
 class Position extends Vector3{
diff --git a/src/pocketmine/scheduler/AsyncTask.php b/src/pocketmine/scheduler/AsyncTask.php
index 00b906526..21be7a736 100644
--- a/src/pocketmine/scheduler/AsyncTask.php
+++ b/src/pocketmine/scheduler/AsyncTask.php
@@ -27,6 +27,7 @@ use pocketmine\Collectable;
 use pocketmine\Server;
 use pocketmine\utils\AssumptionFailedError;
 use function is_scalar;
+use function is_string;
 use function serialize;
 use function unserialize;
 
diff --git a/src/pocketmine/scheduler/SendUsageTask.php b/src/pocketmine/scheduler/SendUsageTask.php
index 7a722b6d0..5b37520c3 100644
--- a/src/pocketmine/scheduler/SendUsageTask.php
+++ b/src/pocketmine/scheduler/SendUsageTask.php
@@ -34,6 +34,7 @@ use pocketmine\utils\VersionString;
 use function array_values;
 use function count;
 use function json_encode;
+use function json_last_error_msg;
 use function md5;
 use function microtime;
 use function php_uname;
diff --git a/src/pocketmine/utils/Internet.php b/src/pocketmine/utils/Internet.php
index 729e57718..271404d36 100644
--- a/src/pocketmine/utils/Internet.php
+++ b/src/pocketmine/utils/Internet.php
@@ -31,6 +31,7 @@ use function curl_getinfo;
 use function curl_init;
 use function curl_setopt_array;
 use function explode;
+use function is_string;
 use function preg_match;
 use function socket_close;
 use function socket_connect;
diff --git a/src/pocketmine/utils/TextFormat.php b/src/pocketmine/utils/TextFormat.php
index 6d106db1c..86662aa8e 100644
--- a/src/pocketmine/utils/TextFormat.php
+++ b/src/pocketmine/utils/TextFormat.php
@@ -25,7 +25,9 @@ namespace pocketmine\utils;
 
 use function is_array;
 use function json_encode;
+use function json_last_error_msg;
 use function mb_scrub;
+use function preg_last_error;
 use function preg_quote;
 use function preg_replace;
 use function preg_split;
diff --git a/src/pocketmine/utils/Timezone.php b/src/pocketmine/utils/Timezone.php
index d6ef2dc3c..02c1ab9d4 100644
--- a/src/pocketmine/utils/Timezone.php
+++ b/src/pocketmine/utils/Timezone.php
@@ -27,12 +27,10 @@ use function abs;
 use function date_default_timezone_set;
 use function date_parse;
 use function exec;
-use function file_exists;
 use function file_get_contents;
 use function implode;
 use function ini_get;
 use function ini_set;
-use function is_link;
 use function is_string;
 use function json_decode;
 use function parse_ini_file;
diff --git a/src/pocketmine/utils/Utils.php b/src/pocketmine/utils/Utils.php
index 0a37267c5..c5240b477 100644
--- a/src/pocketmine/utils/Utils.php
+++ b/src/pocketmine/utils/Utils.php
@@ -54,7 +54,6 @@ use function is_array;
 use function is_dir;
 use function is_file;
 use function is_object;
-use function is_readable;
 use function is_string;
 use function json_decode;
 use function ltrim;