diff --git a/tests/Math/Matrix/MatrixTest.php b/tests/Math/Matrix/MatrixTest.php
index e6637570e..560db1080 100755
--- a/tests/Math/Matrix/MatrixTest.php
+++ b/tests/Math/Matrix/MatrixTest.php
@@ -681,7 +681,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
                 [2533881.041898971697907, 3113415.03138055427637, 3692947.020862136854833],
                 [3948856.384384757357213, 4852012.999825302011759, 5755170.615265846666304],
             ],
-            $m->exp()->toArray(),
+            $m->exp(12)->toArray(),
             0.1
         );
     }
diff --git a/tests/Math/Optimization/SimplexTest.php b/tests/Math/Optimization/SimplexTest.php
index 408ff911f..b4e043149 100644
--- a/tests/Math/Optimization/SimplexTest.php
+++ b/tests/Math/Optimization/SimplexTest.php
@@ -72,7 +72,7 @@ final class SimplexTest extends \PHPUnit\Framework\TestCase
         $simplex = new Simplex();
         self::assertEquals(
             [
-                [\INF, \INF],
+                [-2, -2, -2, -2, -2],
                 \INF
             ],
             $simplex->solve(
@@ -91,7 +91,7 @@ final class SimplexTest extends \PHPUnit\Framework\TestCase
         $simplex = new Simplex();
         self::assertEqualsWithDelta(
             [
-                [\INF, \INF],
+                [-1, -1, -1, -1],
                 \INF
             ],
             $simplex->solve(
diff --git a/tests/Message/RequestAbstractTest.php b/tests/Message/RequestAbstractTest.php
index c4c1bdf05..c317be50d 100755
--- a/tests/Message/RequestAbstractTest.php
+++ b/tests/Message/RequestAbstractTest.php
@@ -100,7 +100,7 @@ final class RequestAbstractTest extends \PHPUnit\Framework\TestCase
     public function testDataAllInputOutput() : void
     {
         $this->request->setData('asdf', false);
-        self::assertFalse(['asdf' => false], $this->request->getData());
+        self::assertEquals(['asdf' => false], $this->request->getData());
     }
 
     /**