diff --git a/.gitmodules b/.gitmodules
index 2a18da0ae..cf20af141 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,9 +7,6 @@
 [submodule "tests/plugins/PocketMine-DevTools"]
 	path = tests/plugins/PocketMine-DevTools
 	url = https://github.com/pmmp/PocketMine-DevTools.git
-[submodule "tests/plugins/PocketMine-TesterPlugin"]
-	path = tests/plugins/PocketMine-TesterPlugin
-	url = https://github.com/pmmp/PocketMine-TesterPlugin.git
 [submodule "src/pocketmine/resources/vanilla"]
 	path = src/pocketmine/resources/vanilla
 	url = https://github.com/pmmp/BedrockData.git
diff --git a/tests/plugins/PocketMine-TesterPlugin b/tests/plugins/PocketMine-TesterPlugin
deleted file mode 160000
index 5fd76d571..000000000
--- a/tests/plugins/PocketMine-TesterPlugin
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 5fd76d57187baa0e80325f268ec2fd3ead405ce2
diff --git a/tests/plugins/TesterPlugin/plugin.yml b/tests/plugins/TesterPlugin/plugin.yml
new file mode 100644
index 000000000..48a9dd2e3
--- /dev/null
+++ b/tests/plugins/TesterPlugin/plugin.yml
@@ -0,0 +1,7 @@
+name: TesterPlugin
+main: pmmp\TesterPlugin\Main
+version: 0.1.0
+api: [3.0.0]
+load: POSTWORLD
+author: pmmp
+description: Plugin used to run tests on PocketMine-MP
diff --git a/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/CheckTestCompletionTask.php b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/CheckTestCompletionTask.php
new file mode 100644
index 000000000..dc65a9a72
--- /dev/null
+++ b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/CheckTestCompletionTask.php
@@ -0,0 +1,50 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pmmp\TesterPlugin;
+
+use pocketmine\scheduler\Task;
+
+class CheckTestCompletionTask extends Task{
+
+	/** @var Main */
+	private $plugin;
+
+	public function __construct(Main $plugin){
+		$this->plugin = $plugin;
+	}
+
+	public function onRun(int $currentTick){
+		$test = $this->plugin->getCurrentTest();
+		if($test === null){
+			if(!$this->plugin->startNextTest()){
+				$this->plugin->getScheduler()->cancelTask($this->getHandler()->getTaskId());
+				$this->plugin->onAllTestsCompleted();
+			}
+		}elseif($test->isFinished() or $test->isTimedOut()){
+			$this->plugin->onTestCompleted($test);
+		}else{
+			$test->tick();
+		}
+	}
+}
diff --git a/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/Main.php b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/Main.php
new file mode 100644
index 000000000..7ef0bcee6
--- /dev/null
+++ b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/Main.php
@@ -0,0 +1,109 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pmmp\TesterPlugin;
+
+use pocketmine\event\Listener;
+use pocketmine\event\server\ServerCommandEvent;
+use pocketmine\plugin\PluginBase;
+
+class Main extends PluginBase implements Listener{
+
+	/** @var Test[] */
+	protected $waitingTests = [];
+	/** @var Test|null */
+	protected $currentTest = null;
+	/** @var Test[] */
+	protected $completedTests = [];
+	/** @var int */
+	protected $currentTestNumber = 0;
+
+	public function onEnable(){
+		$this->getServer()->getPluginManager()->registerEvents($this, $this);
+		$this->getScheduler()->scheduleRepeatingTask(new CheckTestCompletionTask($this), 10);
+
+		$this->waitingTests = [
+			new tests\AsyncTaskMemoryLeakTest($this),
+			new tests\AsyncTaskMainLoggerTest($this)
+		];
+	}
+
+	public function onServerCommand(ServerCommandEvent $event){
+		//The CI will send this command as a failsafe to prevent the build from hanging if the tester plugin failed to
+		//run. However, if the plugin loaded successfully we don't want to allow this to stop the server as there may
+		//be asynchronous tests running. Instead we cancel this and stop the server of our own accord once all tests
+		//have completed.
+		if($event->getCommand() === "stop"){
+			$event->setCancelled();
+		}
+	}
+
+	/**
+	 * @return Test|null
+	 */
+	public function getCurrentTest(){
+		return $this->currentTest;
+	}
+
+	public function startNextTest() : bool{
+		$this->currentTest = array_shift($this->waitingTests);
+		if($this->currentTest !== null){
+			$this->getLogger()->notice("Running test #" . (++$this->currentTestNumber) . " (" . $this->currentTest->getName() . ")");
+			$this->currentTest->start();
+			return true;
+		}
+
+		return false;
+	}
+
+	public function onTestCompleted(Test $test){
+		$message = "Finished test #" . $this->currentTestNumber . " (" . $test->getName() . "): ";
+		switch($test->getResult()){
+			case Test::RESULT_OK:
+				$message .= "PASS";
+				break;
+			case Test::RESULT_FAILED:
+				$message .= "FAIL";
+				break;
+			case Test::RESULT_ERROR:
+				$message .= "ERROR";
+				break;
+			case Test::RESULT_WAITING:
+				$message .= "TIMEOUT";
+				break;
+			default:
+				$message .= "UNKNOWN";
+				break;
+		}
+
+		$this->getLogger()->notice($message);
+
+		$this->completedTests[$this->currentTestNumber] = $test;
+		$this->currentTest = null;
+	}
+
+	public function onAllTestsCompleted(){
+		$this->getLogger()->notice("All tests finished, stopping the server");
+		$this->getServer()->shutdown();
+	}
+}
diff --git a/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/Test.php b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/Test.php
new file mode 100644
index 000000000..5ddb3d8a6
--- /dev/null
+++ b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/Test.php
@@ -0,0 +1,87 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pmmp\TesterPlugin;
+
+abstract class Test{
+	const RESULT_WAITING = -1;
+	const RESULT_OK = 0;
+	const RESULT_FAILED = 1;
+	const RESULT_ERROR = 2;
+
+	private $plugin;
+	private $result = Test::RESULT_WAITING;
+	private $startTime;
+	private $timeout = 60; //seconds
+
+	public function __construct(Main $plugin){
+		$this->plugin = $plugin;
+	}
+
+	public function getPlugin() : Main{
+		return $this->plugin;
+	}
+
+	final public function start(){
+		$this->startTime = time();
+		try{
+			$this->run();
+		}catch(TestFailedException $e){
+			$this->getPlugin()->getLogger()->error($e->getMessage());
+			$this->setResult(Test::RESULT_FAILED);
+		}catch(\Throwable $e){
+			$this->getPlugin()->getLogger()->logException($e);
+			$this->setResult(Test::RESULT_ERROR);
+		}
+	}
+
+	public function tick(){
+
+	}
+
+	abstract public function run();
+
+	public function isFinished() : bool{
+		return $this->result !== Test::RESULT_WAITING;
+	}
+
+	public function isTimedOut() : bool{
+		return !$this->isFinished() and time() - $this->timeout > $this->startTime;
+	}
+
+	protected function setTimeout(int $timeout){
+		$this->timeout = $timeout;
+	}
+
+	public function getResult() : int{
+		return $this->result;
+	}
+
+	public function setResult(int $result){
+		$this->result = $result;
+	}
+
+	abstract public function getName() : string;
+
+	abstract public function getDescription() : string;
+}
diff --git a/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/TestFailedException.php b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/TestFailedException.php
new file mode 100644
index 000000000..c90751806
--- /dev/null
+++ b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/TestFailedException.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pmmp\TesterPlugin;
+
+class TestFailedException extends \Exception{
+
+}
diff --git a/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/tests/AsyncTaskMainLoggerTest.php b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/tests/AsyncTaskMainLoggerTest.php
new file mode 100644
index 000000000..27d3bdc49
--- /dev/null
+++ b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/tests/AsyncTaskMainLoggerTest.php
@@ -0,0 +1,69 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pmmp\TesterPlugin\tests;
+
+use pmmp\TesterPlugin\Test;
+use pocketmine\scheduler\AsyncTask;
+use pocketmine\Server;
+use pocketmine\utils\MainLogger;
+
+class AsyncTaskMainLoggerTest extends Test{
+
+	public function run(){
+		$this->getPlugin()->getServer()->getAsyncPool()->submitTask(new class($this) extends AsyncTask{
+
+			/** @var bool */
+			protected $success = false;
+
+			public function __construct(AsyncTaskMainLoggerTest $testObject){
+				$this->storeLocal($testObject);
+			}
+
+			public function onRun(){
+				ob_start();
+				MainLogger::getLogger()->info("Testing");
+				if(strpos(ob_get_contents(), "Testing") !== false){
+					$this->success = true;
+				}
+				ob_end_flush();
+			}
+
+			public function onCompletion(Server $server){
+				/** @var AsyncTaskMainLoggerTest $test */
+				$test = $this->fetchLocal();
+				$test->setResult($this->success ? Test::RESULT_OK : Test::RESULT_FAILED);
+			}
+		});
+	}
+
+	public function getName() : string{
+		return "MainLogger::getLogger() works in AsyncTasks";
+	}
+
+	public function getDescription() : string{
+		return "Verifies that the MainLogger is accessible by MainLogger::getLogger() in an AsyncTask";
+	}
+
+
+}
diff --git a/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/tests/AsyncTaskMemoryLeakTest.php b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/tests/AsyncTaskMemoryLeakTest.php
new file mode 100644
index 000000000..2b7fd4eab
--- /dev/null
+++ b/tests/plugins/TesterPlugin/src/pmmp/TesterPlugin/tests/AsyncTaskMemoryLeakTest.php
@@ -0,0 +1,60 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pmmp\TesterPlugin\tests;
+
+use pmmp\TesterPlugin\Test;
+use pocketmine\scheduler\AsyncTask;
+
+class AsyncTaskMemoryLeakTest extends Test{
+
+	public function run(){
+		$this->getPlugin()->getServer()->getAsyncPool()->submitTask(new TestAsyncTask());
+	}
+
+	public function tick(){
+		if(TestAsyncTask::$destroyed === true){
+			$this->setResult(Test::RESULT_OK);
+		}
+	}
+
+	public function getName() : string{
+		return "AsyncTask memory leak after completion";
+	}
+
+	public function getDescription() : string{
+		return "Regression test for AsyncTasks objects not being destroyed after completion";
+	}
+}
+
+class TestAsyncTask extends AsyncTask{
+	public static $destroyed = false;
+
+	public function onRun(){
+		usleep(50 * 1000); //1 server tick
+	}
+
+	public function __destruct(){
+		self::$destroyed = true;
+	}
+}
diff --git a/tests/travis.sh b/tests/travis.sh
index 8a590c844..d975014a1 100755
--- a/tests/travis.sh
+++ b/tests/travis.sh
@@ -47,7 +47,7 @@ fi
 mkdir "$DATA_DIR"
 mkdir "$PLUGINS_DIR"
 mv DevTools.phar "$PLUGINS_DIR"
-cp -r tests/plugins/PocketMine-TesterPlugin "$PLUGINS_DIR"
+cp -r tests/plugins/TesterPlugin "$PLUGINS_DIR"
 echo -e "stop\n" | "$PHP_BINARY" PocketMine-MP.phar --no-wizard --disable-ansi --disable-readline --debug.level=2 --data="$DATA_DIR" --plugins="$PLUGINS_DIR" --anonymous-statistics.enabled=0 --settings.async-workers="$PM_WORKERS" --settings.enable-dev-builds=1
 
 output=$(grep '\[TesterPlugin\]' "$DATA_DIR/server.log")