diff --git a/Algorithm/PathFinding/JumpPointSearch.php b/Algorithm/PathFinding/JumpPointSearch.php
index f8ce3f9d8..239c50e19 100644
--- a/Algorithm/PathFinding/JumpPointSearch.php
+++ b/Algorithm/PathFinding/JumpPointSearch.php
@@ -537,7 +537,7 @@ final class JumpPointSearch implements PathFinderInterface
                 return $node;
             }
         } else {
-            throw new \Exception('invalid movement');
+            throw new \Exception('invalid movement'); // @codeCoverageIgnore
         }
 
         return self::jumpStraight($grid->getNode($x + $dx, $y + $dy), $node, $endNode, $grid);
diff --git a/Algorithm/PathFinding/Path.php b/Algorithm/PathFinding/Path.php
index c3ced26b7..732f9666b 100644
--- a/Algorithm/PathFinding/Path.php
+++ b/Algorithm/PathFinding/Path.php
@@ -209,7 +209,7 @@ class Path
             $node = $this->grid->getNode($x0, $y0);
 
             if ($node === null) {
-                break;
+                break; // @codeCoverageIgnore
             }
         }
 
diff --git a/Autoloader.php b/Autoloader.php
index 4b4da968c..f98f5275a 100644
--- a/Autoloader.php
+++ b/Autoloader.php
@@ -127,8 +127,9 @@ final class Autoloader
      */
     public static function invalidate(string $class) : bool
     {
-        if (!\extension_loaded('opcache')
+        if (!\extension_loaded('zend opcache')
             || !\opcache_is_script_cached($class)
+            || \opcache_get_status() === false
         ) {
             return false;
         }
diff --git a/Dispatcher/Dispatcher.php b/Dispatcher/Dispatcher.php
index f28a78223..f98e011cf 100644
--- a/Dispatcher/Dispatcher.php
+++ b/Dispatcher/Dispatcher.php
@@ -68,8 +68,11 @@ final class Dispatcher implements DispatcherInterface
 
         if (\is_array($controller)) {
             if (isset($controller['dest'])) {
-                if (!empty($data) && !empty($controller['data'])) {
-                    $data = \array_merge($data, $controller['data']);
+                if (!empty($controller['data'])) {
+                    $data = \array_merge(
+                        empty($data) ? [] : $data,
+                        \is_array($controller['data']) ? $controller['data'] : [$controller['data']]
+                    );
                 }
 
                 $controller = $controller['dest'];
diff --git a/Math/Matrix/CholeskyDecomposition.php b/Math/Matrix/CholeskyDecomposition.php
index f6f5c2919..deb25f092 100644
--- a/Math/Matrix/CholeskyDecomposition.php
+++ b/Math/Matrix/CholeskyDecomposition.php
@@ -7,6 +7,7 @@
  * @package   phpOMS\Math\Matrix
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
+ * @license   JAMA - https://math.nist.gov/javanumerics/jama/
  * @version   1.0.0
  * @link      https://orange-management.org
  */
@@ -23,6 +24,7 @@ use phpOMS\Math\Matrix\Exception\InvalidDimensionException;
  *
  * @package phpOMS\Math\Matrix
  * @license OMS License 1.0
+ * @license JAMA - https://math.nist.gov/javanumerics/jama/
  * @link    https://orange-management.org
  * @since   1.0.0
  */
diff --git a/Math/Matrix/EigenvalueDecomposition.php b/Math/Matrix/EigenvalueDecomposition.php
index 95d02f53e..32124a6c1 100644
--- a/Math/Matrix/EigenvalueDecomposition.php
+++ b/Math/Matrix/EigenvalueDecomposition.php
@@ -7,6 +7,7 @@
  * @package   phpOMS\Math\Matrix
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
+ * @license   JAMA - https://math.nist.gov/javanumerics/jama/
  * @version   1.0.0
  * @link      https://orange-management.org
  */
@@ -24,6 +25,7 @@ use phpOMS\Math\Geometry\Shape\D2\Triangle;
  *
  * @package phpOMS\Math\Matrix
  * @license OMS License 1.0
+ * @license JAMA - https://math.nist.gov/javanumerics/jama/
  * @link    https://orange-management.org
  * @since   1.0.0
  */
diff --git a/Math/Matrix/LUDecomposition.php b/Math/Matrix/LUDecomposition.php
index 4c9b06530..4944a57f0 100644
--- a/Math/Matrix/LUDecomposition.php
+++ b/Math/Matrix/LUDecomposition.php
@@ -7,6 +7,7 @@
  * @package   phpOMS\Math\Matrix
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
+ * @license   JAMA - https://math.nist.gov/javanumerics/jama/
  * @version   1.0.0
  * @link      https://orange-management.org
  */
@@ -23,6 +24,7 @@ use phpOMS\Math\Matrix\Exception\InvalidDimensionException;
  *
  * @package phpOMS\Math\Matrix
  * @license OMS License 1.0
+ * @license JAMA - https://math.nist.gov/javanumerics/jama/
  * @link    https://orange-management.org
  * @since   1.0.0
  */
diff --git a/Math/Matrix/QRDecomposition.php b/Math/Matrix/QRDecomposition.php
index dd0add4d5..8f7e592fc 100644
--- a/Math/Matrix/QRDecomposition.php
+++ b/Math/Matrix/QRDecomposition.php
@@ -7,6 +7,7 @@
  * @package   phpOMS\Math\Matrix
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
+ * @license   JAMA - https://math.nist.gov/javanumerics/jama/
  * @version   1.0.0
  * @link      https://orange-management.org
  */
@@ -24,6 +25,7 @@ use phpOMS\Math\Matrix\Exception\InvalidDimensionException;
  *
  * @package phpOMS\Math\Matrix
  * @license OMS License 1.0
+ * @license JAMA - https://math.nist.gov/javanumerics/jama/
  * @link    https://orange-management.org
  * @since   1.0.0
  */
diff --git a/Math/Parser/Evaluator.php b/Math/Parser/Evaluator.php
index 4544ad6f1..f8cf2ef3a 100644
--- a/Math/Parser/Evaluator.php
+++ b/Math/Parser/Evaluator.php
@@ -109,7 +109,7 @@ final class Evaluator
         $equation = \preg_split('/([\+\-\*\/\^\(\)])/', $equation, -1, \PREG_SPLIT_NO_EMPTY | \PREG_SPLIT_DELIM_CAPTURE);
 
         if ($equation === false) {
-            return [];
+            return []; // @codeCoverageIgnore
         }
 
         $equation = \array_filter($equation, function($n) {
diff --git a/Message/HeaderAbstract.php b/Message/HeaderAbstract.php
index 6457343cb..551ccbcb5 100644
--- a/Message/HeaderAbstract.php
+++ b/Message/HeaderAbstract.php
@@ -156,7 +156,6 @@ abstract class HeaderAbstract
     public function setStatusCode(int $status) : void
     {
         $this->status = $status;
-        $this->generate($status);
     }
 
     /**
diff --git a/Stdlib/Queue/PriorityQueue.php b/Stdlib/Queue/PriorityQueue.php
index 2153ec1c9..c1088d35e 100644
--- a/Stdlib/Queue/PriorityQueue.php
+++ b/Stdlib/Queue/PriorityQueue.php
@@ -122,7 +122,7 @@ class PriorityQueue implements \Countable, \Serializable
             case PriorityMode::LOWEST:
                 return $this->getInsertLowest($priority);
             default:
-                throw new InvalidEnumValue($this->type);
+                throw new InvalidEnumValue($this->type); // @codeCoverageIgnore
         }
     }
 
diff --git a/System/File/Local/File.php b/System/File/Local/File.php
index 17465bd5d..e6e4e1959 100644
--- a/System/File/Local/File.php
+++ b/System/File/Local/File.php
@@ -444,7 +444,7 @@ final class File extends FileAbstract implements FileInterface, LocalContainerIn
             }
 
             if (!\is_writable(\dirname($path))) {
-                return false;
+                return false; // @codeCoverageIgnore
             }
 
            \touch($path);
diff --git a/System/SystemUtils.php b/System/SystemUtils.php
index 366cdf90f..dcb310888 100644
--- a/System/SystemUtils.php
+++ b/System/SystemUtils.php
@@ -54,7 +54,7 @@ final class SystemUtils
             $fh = \fopen('/proc/meminfo', 'r');
 
             if ($fh === false) {
-                return $mem;
+                return $mem; // @codeCoverageIgnore
             }
 
             while ($line = \fgets($fh)) {
@@ -86,7 +86,7 @@ final class SystemUtils
             $free = \shell_exec('free');
 
             if ($free === null) {
-                return $memUsage;
+                return $memUsage; // @codeCoverageIgnore
             }
 
             $free     = \trim($free);
diff --git a/Uri/HttpUri.php b/Uri/HttpUri.php
index 7f23e1300..21d28b1f6 100644
--- a/Uri/HttpUri.php
+++ b/Uri/HttpUri.php
@@ -214,6 +214,7 @@ final class HttpUri implements UriInterface
      * @return string Returns the current uri
      *
      * @since 1.0.0
+     * @codeCoverageIgnore
      */
     public static function getCurrent() : string
     {
@@ -230,6 +231,7 @@ final class HttpUri implements UriInterface
      * @return HttpUri Returns the current uri
      *
      * @since 1.0.0
+     * @codeCoverageIgnore
      */
     public static function fromCurrent() : self
     {
diff --git a/Uri/UriFactory.php b/Uri/UriFactory.php
index ff27ce57e..0169470ca 100644
--- a/Uri/UriFactory.php
+++ b/Uri/UriFactory.php
@@ -201,9 +201,8 @@ final class UriFactory
 
         /** @var array $urlStructure */
         $urlStructure = \parse_url($url);
-
         if ($urlStructure === false) {
-            return $url;
+            return $url; // @codeCoverageIgnore
         }
 
         if (isset($urlStructure['query'])) {
diff --git a/Utils/Barcode/C128Abstract.php b/Utils/Barcode/C128Abstract.php
index 4ae70e499..5d42f695b 100644
--- a/Utils/Barcode/C128Abstract.php
+++ b/Utils/Barcode/C128Abstract.php
@@ -327,7 +327,7 @@ abstract class C128Abstract
         $image      = \imagecreate($dimensions['width'], $dimensions['height']);
 
         if ($image === false) {
-            throw new \Exception();
+            throw new \Exception(); // @codeCoverageIgnore
         }
 
         $black    = \imagecolorallocate($image, 0, 0, 0);
diff --git a/Utils/Encoding/Huffman/Huffman.php b/Utils/Encoding/Huffman/Huffman.php
index 22a996b6d..5af4a5b1b 100644
--- a/Utils/Encoding/Huffman/Huffman.php
+++ b/Utils/Encoding/Huffman/Huffman.php
@@ -86,7 +86,7 @@ final class Huffman
         $binary               = '';
 
         if ($splittedBinaryString === false) {
-            return $binary;
+            return $binary; // @codeCoverageIgnore
         }
 
         foreach ($splittedBinaryString as $i => $c) {
diff --git a/Utils/IO/Zip/Gz.php b/Utils/IO/Zip/Gz.php
index 8a6462363..113ca159b 100644
--- a/Utils/IO/Zip/Gz.php
+++ b/Utils/IO/Zip/Gz.php
@@ -32,14 +32,14 @@ class Gz implements ArchiveInterface
     public static function pack($source, string $destination, bool $overwrite = false) : bool
     {
         $destination = \str_replace('\\', '/', $destination);
-        if (!$overwrite && \file_exists($destination)) {
+        if (!$overwrite && \file_exists($destination) || !\file_exists($source)) {
             return false;
         }
 
         $gz  = \gzopen($destination, 'w');
         $src = \fopen($source, 'r');
         if ($gz === false || $src === false) {
-            return false;
+            return false; // @codeCoverageIgnore
         }
 
         while (!\feof($src)) {
@@ -65,7 +65,7 @@ class Gz implements ArchiveInterface
         $gz   = \gzopen($source, 'r');
         $dest = \fopen($destination, 'w');
         if ($gz === false || $dest === false) {
-            return false;
+            return false; // @codeCoverageIgnore
         }
 
         while (!\gzeof($gz)) {
diff --git a/Utils/IO/Zip/TarGz.php b/Utils/IO/Zip/TarGz.php
index cfaf3ab43..fe0da5e4e 100644
--- a/Utils/IO/Zip/TarGz.php
+++ b/Utils/IO/Zip/TarGz.php
@@ -33,7 +33,8 @@ class TarGz implements ArchiveInterface
      */
     public static function pack($source, string $destination, bool $overwrite = false) : bool
     {
-        if (!$overwrite && \file_exists($destination)) {
+        $destination = \str_replace('\\', '/', $destination);
+        if (!$overwrite && \file_exists($destination) || !\file_exists($source)) {
             return false;
         }
 
@@ -52,7 +53,8 @@ class TarGz implements ArchiveInterface
      */
     public static function unpack(string $source, string $destination) : bool
     {
-        if (!\file_exists($source)) {
+        $destination = \str_replace('\\', '/', $destination);
+        if (\file_exists($destination) || !\file_exists($source)) {
             return false;
         }
 
diff --git a/Utils/MbStringUtils.php b/Utils/MbStringUtils.php
index 008d3ffe6..f3d3b09ad 100644
--- a/Utils/MbStringUtils.php
+++ b/Utils/MbStringUtils.php
@@ -299,7 +299,7 @@ final class MbStringUtils
             $encodedPos = \strpos($lastChunk, '=');
 
             if ($encodedPos === false) {
-                break;
+                break; // @codeCoverageIgnore
             }
 
             $hex = \substr($text, $length - $reset + $encodedPos + 1, 2);
diff --git a/Utils/StringCompare.php b/Utils/StringCompare.php
index a6a437ae5..f17ee1b9b 100644
--- a/Utils/StringCompare.php
+++ b/Utils/StringCompare.php
@@ -105,7 +105,7 @@ final class StringCompare
         $total  = 0;
 
         if ($words1 === false || $words2 === false) {
-            return \PHP_INT_MAX;
+            return \PHP_INT_MAX; // @codeCoverageIgnore
         }
 
         foreach ($words1 as $word1) {
diff --git a/Views/View.php b/Views/View.php
index 3e961124d..2f572aaa3 100644
--- a/Views/View.php
+++ b/Views/View.php
@@ -246,7 +246,7 @@ class View extends ViewAbstract
         $this->module = \substr($this->template, $start, $end - $start);
 
         if ($this->module === false) {
-            $this->module = '0';
+            $this->module = '0'; // @codeCoverageIgnore
         }
     }
 
@@ -274,7 +274,7 @@ class View extends ViewAbstract
         $this->theme = \substr($this->template, $start, $end - $start);
 
         if ($this->theme === false) {
-            $this->theme = '0';
+            $this->theme = '0'; // @codeCoverageIgnore
         }
     }
 
diff --git a/tests/AutoloaderTest.php b/tests/AutoloaderTest.php
index 47f56355e..22aa82015 100644
--- a/tests/AutoloaderTest.php
+++ b/tests/AutoloaderTest.php
@@ -54,14 +54,20 @@ class AutoloaderTest extends \PHPUnit\Framework\TestCase
 
     public function testOpcodeCacheInvalidation() : void
     {
-        if (!\extension_loaded('opcache')) {
+        if (!\extension_loaded('zend opcache')
+            || \ini_get('opcache.enable') !== '1'
+            || \ini_get('opcache.enable_cli') !== '1'
+            || \ini_get('opcache.file_cache_only') !== '0'
+            || \opcache_get_status() === false
+        ) {
             $this->markTestSkipped(
               'The opcache extension is not available.'
             );
         }
 
+        self::assertFalse(\opcache_is_script_cached(__DIR__ . '/TestLoad3.php'));
         Autoloader::defaultAutoloader('\phpOMS\tests\TestLoad3');
-        Autoloader::invalidate(__DIR__ . '/TestLoad3.php');
+        self::assertTrue(Autoloader::invalidate(__DIR__ . '/TestLoad3.php'));
         self::assertTrue(\opcache_is_script_cached(__DIR__ . '/TestLoad3.php'));
     }
 
diff --git a/tests/Dispatcher/DispatcherTest.php b/tests/Dispatcher/DispatcherTest.php
index c7642bb5d..dbbfca987 100644
--- a/tests/Dispatcher/DispatcherTest.php
+++ b/tests/Dispatcher/DispatcherTest.php
@@ -161,7 +161,7 @@ class DispatcherTest extends \PHPUnit\Framework\TestCase
             !empty(
                 $this->app->dispatcher->dispatch(
                     [
-                        function($req, $resp, $data = null) { return true; },
+                        function($app, $req, $resp, $data = null) { return true; },
                         'phpOMS\tests\Dispatcher\TestController:testFunction',
                         'phpOMS\tests\Dispatcher\TestController::testFunctionStatic',
                     ],
@@ -172,6 +172,22 @@ class DispatcherTest extends \PHPUnit\Framework\TestCase
         );
     }
 
+    public function testArrayWithData() : void
+    {
+        $localization = new Localization();
+
+        self::assertEquals([2],
+            $this->app->dispatcher->dispatch(
+                [
+                    'dest' => function($app, $req, $resp, $data = null) { return $data; },
+                    'data' => 2
+                ],
+                new HttpRequest(new HttpUri(''), $localization),
+                new HttpResponse($localization)
+            )
+        );
+    }
+
     /**
      * @testdox A invalid destination type throws UnexpectedValueException
      * @covers phpOMS\Dispatcher\Dispatcher
diff --git a/tests/Math/Matrix/EigenvalueDecompositionTest.php b/tests/Math/Matrix/EigenvalueDecompositionTest.php
index 8681e5324..b7c92567c 100644
--- a/tests/Math/Matrix/EigenvalueDecompositionTest.php
+++ b/tests/Math/Matrix/EigenvalueDecompositionTest.php
@@ -254,4 +254,44 @@ class EigenvalueDecompositionTest extends \PHPUnit\Framework\TestCase
         self::assertEqualsWithDelta([1, 1], $eig->getRealEigenvalues()->toArray(), 0.1);
         self::assertEqualsWithDelta([2, -2], $eig->getImagEigenvalues()->toArray(), 0.1);
     }
+
+    public function testComplexDivision() : void
+    {
+        $A = new Matrix();
+        $A->setMatrix([
+            [-2, -4, 2],
+            [3, 1, -4],
+            [4, 5, 5],
+        ]);
+
+        $eig = new EigenvalueDecomposition($A);
+        self::assertEqualsWithDelta([
+            [-0.3569, 4.49865, 0.0],
+            [-4.49865, -0.3569, 0],
+            [0.0, 0.0, 4.7139],
+        ], $eig->getD()->toArray(), 0.1);
+
+        self::assertEqualsWithDelta([-0.35695, -0.35695, 4.7139], $eig->getRealEigenvalues()->toArray(), 0.1);
+        self::assertEqualsWithDelta([4.49865, -4.49865, 0.0], $eig->getImagEigenvalues()->toArray(), 0.1);
+    }
+
+    public function testComplexDivision2() : void
+    {
+        $A = new Matrix();
+        $A->setMatrix([
+            [-2, 3, 2],
+            [-4, 1, -4],
+            [4, 5, 5],
+        ]);
+
+        $eig = new EigenvalueDecomposition($A);
+        self::assertEqualsWithDelta([
+            [-2.5510, 0.0, 0.0],
+            [0.0, 3.27552, 4.79404],
+            [0.0, -4.7940, 3.27552],
+        ], $eig->getD()->toArray(), 0.1);
+
+        self::assertEqualsWithDelta([-2.5510, 3.27552, 3.27552], $eig->getRealEigenvalues()->toArray(), 0.1);
+        self::assertEqualsWithDelta([0.0, 4.7940, -4.7940], $eig->getImagEigenvalues()->toArray(), 0.1);
+    }
 }
diff --git a/tests/Math/Statistic/MeasureOfDispersionTest.php b/tests/Math/Statistic/MeasureOfDispersionTest.php
index 30eb25369..311a95d96 100644
--- a/tests/Math/Statistic/MeasureOfDispersionTest.php
+++ b/tests/Math/Statistic/MeasureOfDispersionTest.php
@@ -198,4 +198,11 @@ class MeasureOfDispersionTest extends \PHPUnit\Framework\TestCase
 
         MeasureOfDispersion::empiricalVariance([]);
     }
+
+    public function testInvalidSampleCovarianceDimension() : void
+    {
+        $this->expectException(\phpOMS\Math\Exception\ZeroDivisionException::class);
+
+        MeasureOfDispersion::sampleCovariance([], []);
+    }
 }
diff --git a/tests/Utils/Git/TagTest.php b/tests/Utils/Git/TagTest.php
index cb942aeab..0fd42e98e 100644
--- a/tests/Utils/Git/TagTest.php
+++ b/tests/Utils/Git/TagTest.php
@@ -25,7 +25,7 @@ class TagTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The tag has the expected default values after initialization
-     * @covers phpOMS\Utils\Git\Repository
+     * @covers phpOMS\Utils\Git\Tag
      * @group framework
      */
     public function testDefault() : void
@@ -37,7 +37,7 @@ class TagTest extends \PHPUnit\Framework\TestCase
 
     /**
      * @testdox The tag name can be set during initialization and returned
-     * @covers phpOMS\Utils\Git\Repository
+     * @covers phpOMS\Utils\Git\Tag
      * @group framework
      */
     public function testConstructorInputOutput() : void
@@ -48,7 +48,7 @@ class TagTest extends \PHPUnit\Framework\TestCase
 
     /**
      * @testdox The message can be set and returned
-     * @covers phpOMS\Utils\Git\Repository
+     * @covers phpOMS\Utils\Git\Tag
      * @group framework
      */
     public function testMessageInputOutput() : void
diff --git a/tests/Utils/IO/Zip/TarTest.php b/tests/Utils/IO/Zip/TarTest.php
index 786a3c6b5..d54b81eb2 100644
--- a/tests/Utils/IO/Zip/TarTest.php
+++ b/tests/Utils/IO/Zip/TarTest.php
@@ -44,6 +44,7 @@ class TarTest extends \PHPUnit\Framework\TestCase
                 __DIR__ . '/test a.txt' => 'test a.txt',
                 __DIR__ . '/test b.md'  => 'test b.md',
                 __DIR__ . '/test'       => 'test',
+                __DIR__ . '/invalid.txt',
             ],
             __DIR__ . '/test.tar'
         ));
diff --git a/tests/Utils/IO/Zip/ZipTest.php b/tests/Utils/IO/Zip/ZipTest.php
index 937d9b6d9..1657c9c90 100644
--- a/tests/Utils/IO/Zip/ZipTest.php
+++ b/tests/Utils/IO/Zip/ZipTest.php
@@ -45,6 +45,7 @@ class ZipTest extends \PHPUnit\Framework\TestCase
                 __DIR__ . '/test b.md'  => 'test b.md',
                 __DIR__ . '/invalid.so' => 'invalid.so',
                 __DIR__ . '/test'       => 'test',
+                __DIR__ . '/invalid.txt',
             ],
             __DIR__ . '/test.zip'
         ));