diff --git a/Math/Matrix/Matrix.php b/Math/Matrix/Matrix.php
index 7af90b442..465f12a3f 100755
--- a/Math/Matrix/Matrix.php
+++ b/Math/Matrix/Matrix.php
@@ -162,18 +162,6 @@ class Matrix implements \ArrayAccess, \Iterator
         return $matrix;
     }
 
-    /**
-     * Get matrix array.
-     *
-     * @return array<int, array<int, mixed>>
-     *
-     * @since 1.0.0
-     */
-    public function getMatrix() : array
-    {
-        return $this->matrix;
-    }
-
     /**
      * Get sub matrix array.
      *
@@ -451,7 +439,7 @@ class Matrix implements \ArrayAccess, \Iterator
             throw new InvalidDimensionException($matrix->getM() . 'x' . $matrix->getN());
         }
 
-        $matrixArr    = $matrix->getMatrix();
+        $matrixArr    = $matrix->toArray();
         $newMatrixArr = $this->matrix;
 
         foreach ($newMatrixArr as $i => $vector) {
@@ -553,9 +541,9 @@ class Matrix implements \ArrayAccess, \Iterator
             throw new InvalidDimensionException($mDim . 'x' . $nDim);
         }
 
-        $matrixArr    = $matrix->getMatrix();
+        $matrixArr    = $matrix->toArray();
         $newMatrix    = new self($this->m, $nDim);
-        $newMatrixArr = $newMatrix->getMatrix();
+        $newMatrixArr = $newMatrix->toArray();
 
         for ($i = 0; $i < $this->m; ++$i) { // Row of $this
             for ($c = 0; $c < $nDim; ++$c) { // Column of $matrix
@@ -723,7 +711,7 @@ class Matrix implements \ArrayAccess, \Iterator
     public function dot(self $B) : self
     {
         $value1 = $this->matrix;
-        $value2 = $B->getMatrix();
+        $value2 = $B->toArray();
 
         $m1 = \count($value1);
         $n1 = ($isMatrix1 = \is_array($value1[0])) ? \count($value1[0]) : 1;
diff --git a/Math/Statistic/Forecast/Regression/MultipleLinearRegression.php b/Math/Statistic/Forecast/Regression/MultipleLinearRegression.php
index d5303861a..d73f83bd2 100755
--- a/Math/Statistic/Forecast/Regression/MultipleLinearRegression.php
+++ b/Math/Statistic/Forecast/Regression/MultipleLinearRegression.php
@@ -47,7 +47,7 @@ final class MultipleLinearRegression extends RegressionAbstract
         $Y = new Matrix(\count($y));
         $Y->setMatrix($y);
 
-        return $XT->mult($X)->inverse()->mult($XT)->mult($Y)->getMatrix();
+        return $XT->mult($X)->inverse()->mult($XT)->mult($Y)->toArray();
     }
 
     /**
diff --git a/tests/Math/Matrix/MatrixTest.php b/tests/Math/Matrix/MatrixTest.php
index 560db1080..f6a0d66fa 100755
--- a/tests/Math/Matrix/MatrixTest.php
+++ b/tests/Math/Matrix/MatrixTest.php
@@ -69,7 +69,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
      */
     public function testMultMatrix() : void
     {
-        self::assertEquals([[0, -5], [-6, -7]], $this->C->getMatrix());
+        self::assertEquals([[0, -5], [-6, -7]], $this->C->toArray());
     }
 
     /**
@@ -79,7 +79,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
      */
     public function testMultMatrixScalar() : void
     {
-        self::assertEquals([[0, -10], [-12, -14]], $this->C->mult(2)->getMatrix());
+        self::assertEquals([[0, -10], [-12, -14]], $this->C->mult(2)->toArray());
     }
 
     /**
@@ -291,7 +291,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
      */
     public function testUpperTriangular() : void
     {
-        self::assertEquals([[-6, -7], [0, -5]], $this->C->upperTriangular()->getMatrix());
+        self::assertEquals([[-6, -7], [0, -5]], $this->C->upperTriangular()->toArray());
     }
 
     /**
@@ -301,8 +301,8 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
     public function testLowerTriangular() : void
     {
         self::markTestIncomplete();
-        //self::assertEquals([], $this->C->lowerTriangular()->getMatrix());
-        //self::assertEquals([], $this->C->diagonalize()->getMatrix());
+        //self::assertEquals([], $this->C->lowerTriangular()->toArray());
+        //self::assertEquals([], $this->C->diagonalize()->toArray());
     }
 
     /**
@@ -536,7 +536,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
                     [1, 5, 7],
                     [2, 6, 8],
                 ])
-            )->toArray()
+            )->toVectorArray()
         );
     }
 
@@ -552,7 +552,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
             [11, 39, 53],
             $m->dot(
                 Vector::fromArray([3, 4])
-            )->toArray()
+            )->toVectorArray()
         );
     }
 
diff --git a/tests/Module/ModuleAbstractTest.php b/tests/Module/ModuleAbstractTest.php
index c586e79bd..99cbdf223 100755
--- a/tests/Module/ModuleAbstractTest.php
+++ b/tests/Module/ModuleAbstractTest.php
@@ -285,21 +285,27 @@ final class ModuleAbstractTest extends \PHPUnit\Framework\TestCase
      */
     private function dbSetup() : void
     {
+        \phpOMS\Log\FileLogger::getInstance()->verbose = true;
+
         $GLOBALS['dbpool']->get()->con->prepare(
             'CREATE TABLE `test_base` (
                 `test_base_id` int(11) NOT NULL AUTO_INCREMENT,
                 `test_base_string` varchar(254) NOT NULL,
+                `test_base_compress` BLOB NOT NULL,
+                `test_base_pstring` varchar(254) NOT NULL,
                 `test_base_int` int(11) NOT NULL,
                 `test_base_bool` tinyint(1) DEFAULT NULL,
                 `test_base_null` int(11) DEFAULT NULL,
                 `test_base_float` decimal(5, 4) DEFAULT NULL,
                 `test_base_belongs_to_one` int(11) DEFAULT NULL,
+                `test_base_belongs_top_one` int(11) DEFAULT NULL,
                 `test_base_owns_one_self` int(11) DEFAULT NULL,
+                `test_base_owns_onep_self` int(11) DEFAULT NULL,
                 `test_base_json` varchar(254) DEFAULT NULL,
                 `test_base_json_serializable` varchar(254) DEFAULT NULL,
                 `test_base_serializable` varchar(254) DEFAULT NULL,
                 `test_base_datetime` datetime DEFAULT NULL,
-                `test_base_datetime_null` datetime DEFAULT NULL, /* There was a bug where it returned the current date because new \DateTime(null) === current date which is wrong, we want null as value! */
+                `test_base_datetime_null` datetime DEFAULT NULL,
                 PRIMARY KEY (`test_base_id`)
             )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
         )->execute();
@@ -355,6 +361,49 @@ final class ModuleAbstractTest extends \PHPUnit\Framework\TestCase
                 PRIMARY KEY (`test_has_many_rel_relations_id`)
             )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
         )->execute();
+
+        // private
+        $GLOBALS['dbpool']->get()->con->prepare(
+            'CREATE TABLE `test_has_many_directp` (
+                `test_has_many_directp_id` int(11) NOT NULL AUTO_INCREMENT,
+                `test_has_many_directp_string` varchar(254) NOT NULL,
+                `test_has_many_directp_to` int(11) NOT NULL,
+                PRIMARY KEY (`test_has_many_directp_id`)
+            )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
+        )->execute();
+
+        $GLOBALS['dbpool']->get()->con->prepare(
+            'CREATE TABLE `test_has_many_relp` (
+                `test_has_many_relp_id` int(11) NOT NULL AUTO_INCREMENT,
+                `test_has_many_relp_string` varchar(254) NOT NULL,
+                PRIMARY KEY (`test_has_many_relp_id`)
+            )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
+        )->execute();
+
+        $GLOBALS['dbpool']->get()->con->prepare(
+            'CREATE TABLE `test_has_many_rel_relationsp` (
+                `test_has_many_rel_relationsp_id` int(11) NOT NULL AUTO_INCREMENT,
+                `test_has_many_rel_relationsp_src` int(11) NOT NULL,
+                `test_has_many_rel_relationsp_dest` int(11) NOT NULL,
+                PRIMARY KEY (`test_has_many_rel_relationsp_id`)
+            )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
+        )->execute();
+
+        $GLOBALS['dbpool']->get()->con->prepare(
+            'CREATE TABLE `test_belongs_to_onep` (
+                `test_belongs_to_onep_id` int(11) NOT NULL AUTO_INCREMENT,
+                `test_belongs_to_onep_string` varchar(254) NOT NULL,
+                PRIMARY KEY (`test_belongs_to_onep_id`)
+            )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
+        )->execute();
+
+        $GLOBALS['dbpool']->get()->con->prepare(
+            'CREATE TABLE `test_owns_onep` (
+                `test_owns_onep_id` int(11) NOT NULL AUTO_INCREMENT,
+                `test_owns_onep_string` varchar(254) NOT NULL,
+                PRIMARY KEY (`test_owns_onep_id`)
+            )ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;'
+        )->execute();
     }
 
     /**
@@ -369,6 +418,14 @@ final class ModuleAbstractTest extends \PHPUnit\Framework\TestCase
         $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_has_many_direct')->execute();
         $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_has_many_rel')->execute();
         $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_has_many_rel_relations')->execute();
+
+        $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_has_many_directp')->execute();
+        $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_has_many_relp')->execute();
+        $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_has_many_rel_relationsp')->execute();
+        $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_belongs_to_onep')->execute();
+        $GLOBALS['dbpool']->get()->con->prepare('DROP TABLE test_owns_onep')->execute();
+
+        \phpOMS\Log\FileLogger::getInstance()->verbose = false;
     }
 
     /**