diff --git a/src/FuzeWorks/Core.php b/src/FuzeWorks/Core.php
index 5aef261..f9e89ac 100644
--- a/src/FuzeWorks/Core.php
+++ b/src/FuzeWorks/Core.php
@@ -86,6 +86,13 @@ class Core
      */
     protected static $errorHandlers = [];
 
+    /**
+     * Array of all classMaps which can be autoloaded.
+     *
+     * @var array
+     */
+    protected static $autoloadMap = [];
+
     /**
      * Initializes the core.
      *
@@ -251,8 +258,6 @@ class Core
         }
     }
 
-    protected static $autoloadMap = [];
-
     /**
      * @param string $nameSpacePrefix
      * @param string $filePath
@@ -292,6 +297,17 @@ class Core
         }
     }
 
+    /**
+     * Clears the autoloader to its original state.
+     *
+     * Not intended for use by developer. Only for use during testing
+     * @internal
+     */
+    public static function clearAutoloader()
+    {
+        self::$autoloadMap = [];
+    }
+
     /**
      * Tests for file writability
      *
diff --git a/src/FuzeWorks/Libraries.php b/src/FuzeWorks/Libraries.php
index 52fccda..0420808 100644
--- a/src/FuzeWorks/Libraries.php
+++ b/src/FuzeWorks/Libraries.php
@@ -37,7 +37,10 @@
 namespace FuzeWorks;
 
 use FuzeWorks\Exception\ConfigException;
+use FuzeWorks\Exception\CoreException;
 use FuzeWorks\Exception\LibraryException;
+use ReflectionClass;
+use ReflectionException;
 
 class Libraries
 {
@@ -196,12 +199,27 @@ class Libraries
         }
 
         // Load the class object
+        /** @var iLibrary $classObject */
         $classObject = new $libraryClass($parameters);
 
-        // @todo Check if library has all required methods (iLibrary)
-        // @todo Implement autoloading for libraries
+        // If not instance of iLibrary, refuse the library
+        if (!$classObject instanceof iLibrary)
+            throw new LibraryException("Could not initiate library. Library is not instance of iLibrary.");
 
-        // Check if the address is already reserved, if it is, we can presume that a new instance is requested.
+        // Add the library files to the autoloader
+        try {
+            $headerReflection = new ReflectionClass(get_class($classObject));
+            $filePath = dirname($headerReflection->getFileName()) . (!is_null($classObject->getSourceDirectory()) ? DS . $classObject->getSourceDirectory() : '' );
+            $prefix = $classObject->getClassesPrefix();
+            if (!is_null($filePath) && !is_null($prefix))
+                Core::addAutoloadMap($prefix, $filePath);
+        } catch (ReflectionException $e) {
+            throw new LibraryException("Could not initiate library. ReflectionClass threw exception.");
+        } catch (CoreException $e) {
+            throw new LibraryException("Could not initiate library. Failed to add to autoloader.");
+        }
+
+        // @todo Check if the address is already reserved, if it is, we can presume that a new instance is requested.
         // Otherwise this code would not be reached
 
         // Now load the class
diff --git a/src/FuzeWorks/iLibrary.php b/src/FuzeWorks/iLibrary.php
new file mode 100644
index 0000000..598c4f5
--- /dev/null
+++ b/src/FuzeWorks/iLibrary.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * FuzeWorks Framework Core.
+ *
+ * The FuzeWorks PHP FrameWork
+ *
+ * Copyright (C) 2013-2019 TechFuze
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * @author    TechFuze
+ * @copyright Copyright (c) 2013 - 2019, TechFuze. (http://techfuze.net)
+ * @license   https://opensource.org/licenses/MIT MIT License
+ *
+ * @link  http://techfuze.net/fuzeworks
+ * @since Version 0.0.1
+ *
+ * @version Version 1.2.0
+ */
+
+namespace FuzeWorks;
+
+
+interface iLibrary
+{
+    /**
+     * Should return the namespace prefix of the classes of this library.
+     *
+     * Used to autoload classes of this library.
+     * @see https://www.php-fig.org/psr/psr-4/
+     *
+     * Invoked upon `FuzeWorks\Libraries:get`. Autoloading library classes before that is not possible.
+     *
+     * @return string|null
+     */
+    public function getClassesPrefix(): ?string;
+
+    /**
+     * Should return the directory where the classes of this library can be found.
+     *
+     * Only the source directory within the library should be returned, e.g:
+     * If the source directory is 'src' within the library directory, return 'src'
+     *
+     * @return string|null
+     */
+    public function getSourceDirectory(): ?string;
+
+}
\ No newline at end of file
diff --git a/test/core/abstract.coreTestAbstract.php b/test/core/abstract.coreTestAbstract.php
index 3cd45d2..af4db16 100644
--- a/test/core/abstract.coreTestAbstract.php
+++ b/test/core/abstract.coreTestAbstract.php
@@ -48,22 +48,23 @@ use FuzeWorks\LoggerTracyBridge;
 abstract class CoreTestAbstract extends TestCase
 {
     /**
-     * Remove all listeners before the next test starts.
-     *
-     * Reset the layout manager
+     * Reset multiple components to their original state before running the next test
      */
     public function tearDown()
     {
         // Clear all events created by tests
-        Events::$listeners = array();
+        Events::$listeners = [];
 
         // Reset all config files
-        Factory::getInstance()->config->discardConfigFiles();
+        Factory::getInstance('config')->discardConfigFiles();
 
         // Re-enable events, in case they have been disabled
         Events::enable();
 
         // Remove Config overrides
         Config::$configOverrides = [];
+
+        // Remove autoloader
+        Core::clearAutoloader();
     }
 }
diff --git a/test/core/core_configuratorTest.php b/test/core/core_configuratorTest.php
index 1b52349..3ec6063 100644
--- a/test/core/core_configuratorTest.php
+++ b/test/core/core_configuratorTest.php
@@ -64,6 +64,8 @@ class configuratorTest extends CoreTestAbstract
 
     public function tearDown()
     {
+        parent::tearDown();
+
         Core::$tempDir = dirname(__DIR__) . '/temp';
         Core::$logDir = dirname(__DIR__) . '/temp';
     }
diff --git a/test/core/core_factoryTest.php b/test/core/core_factoryTest.php
index 680496a..df25b51 100644
--- a/test/core/core_factoryTest.php
+++ b/test/core/core_factoryTest.php
@@ -310,6 +310,8 @@ class factoryTest extends CoreTestAbstract
 
     public function tearDown()
     {
+        parent::tearDown();
+
         $factory = Factory::getInstance();
         if (isset($factory->mock))
            $factory->removeInstance('mock');
diff --git a/test/core/core_libraryTest.php b/test/core/core_libraryTest.php
index 256ed35..123513e 100644
--- a/test/core/core_libraryTest.php
+++ b/test/core/core_libraryTest.php
@@ -195,8 +195,36 @@ class libraryTest extends CoreTestAbstract
         $this->libraries->addLibraryClass('LibraryClassFail', '\Case\Not\Exist');
     }
 
+    /**
+     * @depends testAddLibraryClass
+     * @covers ::initLibrary
+     */
+    public function testAddLibraryWithAutoloader()
+    {
+        // First assert the extra class can't be autoloaded
+        $this->assertFalse(class_exists('FuzeWorks\Test\TestAddLibraryWithAutoloader\SomeExtraClass', true));
+
+        // Load the library and test the instance type
+        $this->assertInstanceOf('Application\Library\TestAddLibraryWithAutoloader', $this->libraries->get('TestAddLibraryWithAutoloader'));
+
+        // Afterwards test if the loader has been correctly added
+        $this->assertTrue(class_exists('FuzeWorks\Test\TestAddLibraryWithAutoloader\SomeExtraClass', true));
+    }
+
+    /**
+     * @depends testAddLibraryWithAutoloader
+     * @covers ::initLibrary
+     * @expectedException \FuzeWorks\Exception\LibraryException
+     */
+    public function testAddBadAutoloader()
+    {
+        $this->assertInstanceOf('Application\Library\TestAddBadAutoloader', $this->libraries->get('TestAddBadAutoloader'));
+    }
+
     public function tearDown()
     {
+        parent::tearDown();
+
         Factory::getInstance()->config->getConfig('error')->revert();
     }
 
diff --git a/test/core/core_loggerTest.php b/test/core/core_loggerTest.php
index 0a9bb51..69f9577 100644
--- a/test/core/core_loggerTest.php
+++ b/test/core/core_loggerTest.php
@@ -213,6 +213,8 @@ class loggerTest extends CoreTestAbstract
 
     public function tearDown()
     {
+        parent::tearDown();
+
         Logger::disable();
         Logger::$logs = array();
     }
diff --git a/test/core/core_pluginsTest.php b/test/core/core_pluginsTest.php
index 1793f43..29beb1a 100644
--- a/test/core/core_pluginsTest.php
+++ b/test/core/core_pluginsTest.php
@@ -198,6 +198,8 @@ class pluginTest extends CoreTestAbstract
 
     public function tearDown()
     {
+        parent::tearDown();
+
         $factory = Factory::getInstance();
         $factory->config->plugins->revert();
     }
diff --git a/test/libraries/TestAddBadAutoloader/TestAddBadAutoloader.php b/test/libraries/TestAddBadAutoloader/TestAddBadAutoloader.php
new file mode 100644
index 0000000..a647f52
--- /dev/null
+++ b/test/libraries/TestAddBadAutoloader/TestAddBadAutoloader.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * FuzeWorks Framework Core.
+ *
+ * The FuzeWorks PHP FrameWork
+ *
+ * Copyright (C) 2013-2019 TechFuze
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * @author    TechFuze
+ * @copyright Copyright (c) 2013 - 2019, TechFuze. (http://techfuze.net)
+ * @license   https://opensource.org/licenses/MIT MIT License
+ *
+ * @link  http://techfuze.net/fuzeworks
+ * @since Version 0.0.1
+ *
+ * @version Version 1.2.0
+ */
+
+namespace Application\Library;
+use FuzeWorks\iLibrary;
+
+class TestAddBadAutoloader implements iLibrary
+{
+
+    public function getClassesPrefix(): ?string
+    {
+        return "";
+    }
+
+    public function getSourceDirectory(): ?string
+    {
+        return "non_existent";
+    }
+}
\ No newline at end of file
diff --git a/test/libraries/TestAddLibraryClass/TestAddLibraryClass.php b/test/libraries/TestAddLibraryClass/TestAddLibraryClass.php
index 9df47aa..7d91b58 100644
--- a/test/libraries/TestAddLibraryClass/TestAddLibraryClass.php
+++ b/test/libraries/TestAddLibraryClass/TestAddLibraryClass.php
@@ -34,7 +34,16 @@
  * @version Version 1.2.0
  */
 namespace Custom\Spaces;
+use FuzeWorks\iLibrary;
 
-class TestAddLibraryClass {
+class TestAddLibraryClass implements iLibrary {
+    public function getClassesPrefix(): ?string
+    {
+        return null;
+    }
 
+    public function getSourceDirectory(): ?string
+    {
+        return null;
+    }
 }
\ No newline at end of file
diff --git a/test/libraries/TestAddLibraryWithAutoloader/SomeExtraClass.php b/test/libraries/TestAddLibraryWithAutoloader/SomeExtraClass.php
new file mode 100644
index 0000000..0ac892c
--- /dev/null
+++ b/test/libraries/TestAddLibraryWithAutoloader/SomeExtraClass.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * FuzeWorks Framework Core.
+ *
+ * The FuzeWorks PHP FrameWork
+ *
+ * Copyright (C) 2013-2019 TechFuze
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * @author    TechFuze
+ * @copyright Copyright (c) 2013 - 2019, TechFuze. (http://techfuze.net)
+ * @license   https://opensource.org/licenses/MIT MIT License
+ *
+ * @link  http://techfuze.net/fuzeworks
+ * @since Version 0.0.1
+ *
+ * @version Version 1.2.0
+ */
+
+namespace FuzeWorks\Test\TestAddLibraryWithAutoloader;
+
+
+class SomeExtraClass
+{
+
+}
\ No newline at end of file
diff --git a/test/libraries/TestAddLibraryWithAutoloader/TestAddLibraryWithAutoloader.php b/test/libraries/TestAddLibraryWithAutoloader/TestAddLibraryWithAutoloader.php
new file mode 100644
index 0000000..b8217d3
--- /dev/null
+++ b/test/libraries/TestAddLibraryWithAutoloader/TestAddLibraryWithAutoloader.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * FuzeWorks Framework Core.
+ *
+ * The FuzeWorks PHP FrameWork
+ *
+ * Copyright (C) 2013-2019 TechFuze
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * @author    TechFuze
+ * @copyright Copyright (c) 2013 - 2019, TechFuze. (http://techfuze.net)
+ * @license   https://opensource.org/licenses/MIT MIT License
+ *
+ * @link  http://techfuze.net/fuzeworks
+ * @since Version 0.0.1
+ *
+ * @version Version 1.2.0
+ */
+
+namespace Application\Library;
+use FuzeWorks\iLibrary;
+
+class TestAddLibraryWithAutoloader implements iLibrary
+{
+
+    public function getClassesPrefix(): ?string
+    {
+        return "FuzeWorks\Test\TestAddLibraryWithAutoloader";
+    }
+
+    public function getSourceDirectory(): ?string
+    {
+        return "";
+    }
+}
\ No newline at end of file
diff --git a/test/libraries/TestGetLibraryFromAltDirectory/TestGetLibraryFromAltDirectory.php b/test/libraries/TestGetLibraryFromAltDirectory/TestGetLibraryFromAltDirectory.php
index c3b58e2..711f9f7 100644
--- a/test/libraries/TestGetLibraryFromAltDirectory/TestGetLibraryFromAltDirectory.php
+++ b/test/libraries/TestGetLibraryFromAltDirectory/TestGetLibraryFromAltDirectory.php
@@ -34,7 +34,16 @@
  * @version Version 1.2.0
  */
 namespace Application\Library;
+use FuzeWorks\iLibrary;
 
-class TestGetLibraryFromAltDirectory {
+class TestGetLibraryFromAltDirectory implements iLibrary {
+    public function getClassesPrefix(): ?string
+    {
+        return null;
+    }
 
+    public function getSourceDirectory(): ?string
+    {
+        return null;
+    }
 }
\ No newline at end of file
diff --git a/test/libraries/TestGetLibraryFromDirectory/TestGetLibraryFromDirectory.php b/test/libraries/TestGetLibraryFromDirectory/TestGetLibraryFromDirectory.php
index 4a3d3ed..04f49bc 100644
--- a/test/libraries/TestGetLibraryFromDirectory/TestGetLibraryFromDirectory.php
+++ b/test/libraries/TestGetLibraryFromDirectory/TestGetLibraryFromDirectory.php
@@ -34,7 +34,17 @@
  * @version Version 1.2.0
  */
 namespace Application\Library;
+use FuzeWorks\iLibrary;
 
-class TestGetLibraryFromDirectory {
+class TestGetLibraryFromDirectory implements iLibrary {
 
+    public function getClassesPrefix(): ?string
+    {
+        return null;
+    }
+
+    public function getSourceDirectory(): ?string
+    {
+        return null;
+    }
 }
\ No newline at end of file
diff --git a/test/libraries/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory.php b/test/libraries/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory.php
index 8b7bf93..2170b3c 100644
--- a/test/libraries/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory.php
+++ b/test/libraries/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory/TestGetLibraryFromSubdirectory.php
@@ -34,7 +34,16 @@
  * @version Version 1.2.0
  */
 namespace Application\Library;
+use FuzeWorks\iLibrary;
 
-class TestGetLibraryFromSubdirectory {
+class TestGetLibraryFromSubdirectory implements iLibrary {
+    public function getClassesPrefix(): ?string
+    {
+        return null;
+    }
 
+    public function getSourceDirectory(): ?string
+    {
+        return null;
+    }
 }
\ No newline at end of file
diff --git a/test/libraries/TestGetLibraryParametersFromConfig/TestGetLibraryParametersFromConfig.php b/test/libraries/TestGetLibraryParametersFromConfig/TestGetLibraryParametersFromConfig.php
index 4e81d56..52c02de 100644
--- a/test/libraries/TestGetLibraryParametersFromConfig/TestGetLibraryParametersFromConfig.php
+++ b/test/libraries/TestGetLibraryParametersFromConfig/TestGetLibraryParametersFromConfig.php
@@ -34,8 +34,9 @@
  * @version Version 1.2.0
  */
 namespace Application\Library;
+use FuzeWorks\iLibrary;
 
-class TestGetLibraryParametersFromConfig {
+class TestGetLibraryParametersFromConfig implements iLibrary {
 
 	public $parameters;
 
@@ -44,4 +45,14 @@ class TestGetLibraryParametersFromConfig {
 		$this->parameters = $parameters;
 	}
 
+    public function getClassesPrefix(): ?string
+    {
+        return null;
+    }
+
+    public function getSourceDirectory(): ?string
+    {
+        return null;
+    }
+
 }
\ No newline at end of file