diff --git a/composer.json b/composer.json
index eeccc53..9784154 100644
--- a/composer.json
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diff --git a/composer.lock b/composer.lock
index bf1fd1f..27f1829 100644
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@@ -148,39 +197,87 @@
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+            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
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@@ -1101,16 +1213,16 @@
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             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/0047c8366744a16de7516622c5b7355336afae96",
-                "reference": "0047c8366744a16de7516622c5b7355336afae96",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/f291ed25eb1435bddbe8a96caaef16469c2a092d",
+                "reference": "f291ed25eb1435bddbe8a96caaef16469c2a092d",
                 "shasum": ""
             },
             "require": {
@@ -1119,7 +1231,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.0-dev"
+                    "dev-master": "3.1-dev"
                 }
             },
             "autoload": {
@@ -1146,7 +1258,57 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2016-03-04 07:55:57"
+            "time": "2016-09-02 02:12:52"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "bb2d123231c095735130cc8f6d31385a44c7b308"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/bb2d123231c095735130cc8f6d31385a44c7b308",
+                "reference": "bb2d123231c095735130cc8f6d31385a44c7b308",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3|^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2016-08-09 15:02:57"
         }
     ],
     "aliases": [],
diff --git a/tests/Phpml/NeuralNetwork/Node/Neuron/SynapseTest.php b/tests/Phpml/NeuralNetwork/Node/Neuron/SynapseTest.php
index 9ad733d..82560f1 100644
--- a/tests/Phpml/NeuralNetwork/Node/Neuron/SynapseTest.php
+++ b/tests/Phpml/NeuralNetwork/Node/Neuron/SynapseTest.php
@@ -44,8 +44,8 @@ class SynapseTest extends \PHPUnit_Framework_TestCase
      */
     private function getNodeMock($output = 1)
     {
-        $node = $this->getMock(Neuron::class);
-        $node->method('getOutput')->willReturn($nodeOutput = 0.5);
+        $node = $this->getMockBuilder(Neuron::class)->getMock();
+        $node->method('getOutput')->willReturn($output);
 
         return $node;
     }
diff --git a/tests/Phpml/NeuralNetwork/Node/NeuronTest.php b/tests/Phpml/NeuralNetwork/Node/NeuronTest.php
index c416ffd..13bf6c5 100644
--- a/tests/Phpml/NeuralNetwork/Node/NeuronTest.php
+++ b/tests/Phpml/NeuralNetwork/Node/NeuronTest.php
@@ -20,7 +20,7 @@ class NeuronTest extends \PHPUnit_Framework_TestCase
 
     public function testNeuronActivationFunction()
     {
-        $activationFunction = $this->getMock(BinaryStep::class);
+        $activationFunction = $this->getMockBuilder(BinaryStep::class)->getMock();
         $activationFunction->method('compute')->with(0)->willReturn($output = 0.69);
 
         $neuron = new Neuron($activationFunction);
@@ -57,7 +57,7 @@ class NeuronTest extends \PHPUnit_Framework_TestCase
      */
     private function getSynapseMock($output = 2)
     {
-        $synapse = $this->getMock(Synapse::class, [], [], '', false);
+        $synapse = $this->getMockBuilder(Synapse::class)->disableOriginalConstructor()->getMock();
         $synapse->method('getOutput')->willReturn($output);
 
         return $synapse;