diff --git a/tests/ColumnVectorTest.php b/tests/ColumnVectorTest.php
index b98c7d5..659fd45 100644
--- a/tests/ColumnVectorTest.php
+++ b/tests/ColumnVectorTest.php
@@ -3,7 +3,6 @@
 namespace Tensor\Tests;
 
 use Tensor\Tensor;
-use Tensor\Vector;
 use Tensor\Matrix;
 use Tensor\Special;
 use Tensor\ArrayLike;
diff --git a/tests/MatrixTest.php b/tests/MatrixTest.php
index 1bf635d..3eede24 100644
--- a/tests/MatrixTest.php
+++ b/tests/MatrixTest.php
@@ -735,11 +735,10 @@ public function cholesky() : void
      * @requires extension tensor
      * @dataProvider eigProvider
      *
-     * @param \Tensor\Matrix $a
-     * @param \Tensor\Tensor|float $b
-     * @param \Tensor\Tensor|float $expected
+     * @param \Tensor\Matrix $matrix
+     * @param \Tensor\Decompositions\Eigen $expected
      */
-    public function eig(Matrix $matrix, $expected) : void
+    public function eig(Matrix $matrix, Eigen $expected) : void
     {
         $eig = $matrix->eig(false);
 
@@ -757,9 +756,11 @@ public function eigProvider() : Generator
                 [4.0, 11.0, -2.0],
                 [20.0, -6.0, -9.0],
             ]),
-            new Eigen([
+            new Eigen(
+                [
                     -15.096331148319537, 25.108706520450326, 13.9876246278692,
-                ], Matrix::quick([
+                ],
+                Matrix::quick([
                     [0.25848694820886425, -0.11314537870318066, -0.9593657388523845],
                     [-0.8622719261400653, -0.17721179605718698, -0.47442924101375483],
                     [-0.6684472200177011, -0.6126879076802705, -0.42165369894378907],
@@ -994,7 +995,7 @@ public function multiplyProvider() : Generator
     /**
      * @test
      * @dataProvider divideProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1075,7 +1076,7 @@ public function divideProvider() : Generator
     /**
      * @test
      * @dataProvider addProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1156,7 +1157,7 @@ public function addProvider() : Generator
     /**
      * @test
      * @dataProvider subtractProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1237,7 +1238,7 @@ public function subtractProvider() : Generator
     /**
      * @test
      * @dataProvider powProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1304,7 +1305,7 @@ public function powProvider() : Generator
     /**
      * @test
      * @dataProvider modProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1385,7 +1386,7 @@ public function modProvider() : Generator
     /**
      * @test
      * @dataProvider equalProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1466,7 +1467,7 @@ public function equalProvider() : Generator
     /**
      * @test
      * @dataProvider notEqualProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1547,7 +1548,7 @@ public function notEqualProvider() : Generator
     /**
      * @test
      * @dataProvider greaterProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1628,7 +1629,7 @@ public function greaterProvider() : Generator
     /**
      * @test
      * @dataProvider greaterEqualProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1709,7 +1710,7 @@ public function greaterEqualProvider() : Generator
     /**
      * @test
      * @dataProvider lessProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1790,7 +1791,7 @@ public function lessProvider() : Generator
     /**
      * @test
      * @dataProvider lessEqualProvider
-     * 
+     *
      * @param \Tensor\Matrix $a
      * @param \Tensor\Tensor|float $b
      * @param \Tensor\Tensor|float $expected
@@ -1953,7 +1954,6 @@ public function exp() : void
             [8103.08392757538],
         ]);
 
-
         $this->assertEqualsWithDelta($expected, $b, 1e-8);
     }
 
@@ -2099,7 +2099,7 @@ public function acos() : void
             [-0.5],
             [0.01],
         ]);
-        
+
         $b = $a->acos();
 
         $expected = Matrix::quick([
diff --git a/tests/VectorTest.php b/tests/VectorTest.php
index f17ef5f..4237335 100644
--- a/tests/VectorTest.php
+++ b/tests/VectorTest.php
@@ -147,7 +147,7 @@ public function linspace() : void
      * @dataProvider shapeProvider
      *
      * @param \Tensor\Vector $vector
-     * @param array $expected
+     * @param array<int> $expected
      */
     public function shape(Vector $vector, array $expected) : void
     {
@@ -545,7 +545,7 @@ public function addProvider() : Generator
 
         yield [
             Vector::quick([-15.0, 25.0, 35.0, -36.0, -72.0, 89.0, 106.0, 45.0]),
-            10.0,    
+            10.0,
             Vector::quick([-5.0, 35.0, 45.0, -26.0, -62.0, 99.0, 116.0, 55.0]),
         ];
     }
@@ -913,7 +913,7 @@ public function lessEqualProvider() : Generator
                 [0, 0, 0, 1, 0, 0],
                 [0, 0, 0, 1, 0, 1],
             ]),
-    
+
         ];
 
         yield [
@@ -982,7 +982,7 @@ public function abs() : void
     public function square() : void
     {
         $a = Vector::quick([-15.0, 25.0, 35.0, -36.0, -72.0, 89.0, 106.0, 45.0]);
-        
+
         $b = $a->square();
 
         $expected = Vector::quick([225, 625, 1225, 1296, 5184, 7921, 11236, 2025]);