diff --git a/composer.json b/composer.json
index 552c15d2..5ac1e731 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,8 @@
         }
 
     ],
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "require": {
         "php": "^7.0",
         "ext-intl": "*",
@@ -36,7 +38,8 @@
         "phpdocumentor/phpdocumentor": "2.*",
         "friendsofphp/php-cs-fixer": "^2.2",
         "phing/phing": "^2.16",
-        "pear/archive_tar": "*"
+        "pear/archive_tar": "*",
+        "johnkary/phpunit-speedtrap": "^2.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
index 597efa59..d6e1294f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "1193e4106b6c84c545e6091560214ad5",
+    "content-hash": "2a8e077ce9d05d304c9041be28d1154e",
     "packages": [
         {
             "name": "docopt/docopt",
@@ -54,16 +54,16 @@
         },
         {
             "name": "fguillot/picofeed",
-            "version": "v0.1.35",
+            "version": "v0.1.37",
             "source": {
                 "type": "git",
                 "url": "https://github.com/miniflux/picoFeed.git",
-                "reference": "3a27b47de31eedec075c719f961783c5db7a7b08"
+                "reference": "402b7f07629577e7929625e78bc88d3d5831a22d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/miniflux/picoFeed/zipball/3a27b47de31eedec075c719f961783c5db7a7b08",
-                "reference": "3a27b47de31eedec075c719f961783c5db7a7b08",
+                "url": "https://api.github.com/repos/miniflux/picoFeed/zipball/402b7f07629577e7929625e78bc88d3d5831a22d",
+                "reference": "402b7f07629577e7929625e78bc88d3d5831a22d",
                 "shasum": ""
             },
             "require": {
@@ -103,7 +103,7 @@
             ],
             "description": "Modern library to handle RSS/Atom feeds",
             "homepage": "https://github.com/miniflux/picoFeed",
-            "time": "2017-06-20T22:54:47+00:00"
+            "time": "2017-11-02T03:20:36+00:00"
         },
         {
             "name": "hosteurope/password-generator",
@@ -192,16 +192,16 @@
         },
         {
             "name": "phpseclib/phpseclib",
-            "version": "2.0.6",
+            "version": "2.0.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpseclib/phpseclib.git",
-                "reference": "34a7699e6f31b1ef4035ee36444407cecf9f56aa"
+                "reference": "f4b6a522dfa1fd1e477c9cfe5909d5b31f098c0b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/34a7699e6f31b1ef4035ee36444407cecf9f56aa",
-                "reference": "34a7699e6f31b1ef4035ee36444407cecf9f56aa",
+                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/f4b6a522dfa1fd1e477c9cfe5909d5b31f098c0b",
+                "reference": "f4b6a522dfa1fd1e477c9cfe5909d5b31f098c0b",
                 "shasum": ""
             },
             "require": {
@@ -280,7 +280,7 @@
                 "x.509",
                 "x509"
             ],
-            "time": "2017-06-05T06:31:10+00:00"
+            "time": "2017-10-23T05:04:54+00:00"
         },
         {
             "name": "zendframework/zendxml",
@@ -760,16 +760,16 @@
         },
         {
             "name": "friendsofphp/php-cs-fixer",
-            "version": "v2.2.8",
+            "version": "v2.2.9",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfPHP/PHP-CS-Fixer.git",
-                "reference": "aca23e791784eade7b377d578d6dfc6fcf1398d2"
+                "reference": "eace538b022a2b7db59ef7b5460cb8c66cb20b50"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/aca23e791784eade7b377d578d6dfc6fcf1398d2",
-                "reference": "aca23e791784eade7b377d578d6dfc6fcf1398d2",
+                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/eace538b022a2b7db59ef7b5460cb8c66cb20b50",
+                "reference": "eace538b022a2b7db59ef7b5460cb8c66cb20b50",
                 "shasum": ""
             },
             "require": {
@@ -780,17 +780,17 @@
                 "gecko-packages/gecko-php-unit": "^2.0",
                 "php": "^5.3.6 || >=7.0 <7.3",
                 "sebastian/diff": "^1.4",
-                "symfony/console": "^2.4 || ^3.0",
-                "symfony/event-dispatcher": "^2.1 || ^3.0",
-                "symfony/filesystem": "^2.4 || ^3.0",
-                "symfony/finder": "^2.2 || ^3.0",
-                "symfony/options-resolver": "^2.6 || ^3.0",
+                "symfony/console": "^2.4 || ^3.0 || ^4.0",
+                "symfony/event-dispatcher": "^2.1 || ^3.0 || ^4.0",
+                "symfony/filesystem": "^2.4 || ^3.0 || ^4.0",
+                "symfony/finder": "^2.2 || ^3.0 || ^4.0",
+                "symfony/options-resolver": "^2.6 || ^3.0 || ^4.0",
                 "symfony/polyfill-php54": "^1.0",
                 "symfony/polyfill-php55": "^1.3",
                 "symfony/polyfill-php70": "^1.0",
                 "symfony/polyfill-php72": "^1.4",
-                "symfony/process": "^2.3 || ^3.0",
-                "symfony/stopwatch": "^2.5 || ^3.0"
+                "symfony/process": "^2.3 || ^3.0 || ^4.0",
+                "symfony/stopwatch": "^2.5 || ^3.0 || ^4.0"
             },
             "conflict": {
                 "hhvm": "<3.18"
@@ -798,9 +798,9 @@
             "require-dev": {
                 "johnkary/phpunit-speedtrap": "^1.0.1",
                 "justinrainbow/json-schema": "^5.0",
+                "php-coveralls/php-coveralls": "^1.0.2",
                 "phpunit/phpunit": "^4.8.35 || ^5.4.3",
-                "satooshi/php-coveralls": "^1.0",
-                "symfony/phpunit-bridge": "^3.2.2"
+                "symfony/phpunit-bridge": "^3.2.2 || ^4.0"
             },
             "suggest": {
                 "ext-mbstring": "For handling non-UTF8 characters in cache signature.",
@@ -841,7 +841,7 @@
                 }
             ],
             "description": "A tool to automatically fix PHP code style",
-            "time": "2017-09-29T15:07:49+00:00"
+            "time": "2017-11-02T12:46:49+00:00"
         },
         {
             "name": "gecko-packages/gecko-php-unit",
@@ -1136,16 +1136,16 @@
         },
         {
             "name": "jms/serializer",
-            "version": "1.9.0",
+            "version": "1.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/schmittjoh/serializer.git",
-                "reference": "f4683f41ebf21e60667447bb49939bee35807c3c"
+                "reference": "e708d6ef549044974b60a57fdcec2fa165436d57"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/f4683f41ebf21e60667447bb49939bee35807c3c",
-                "reference": "f4683f41ebf21e60667447bb49939bee35807c3c",
+                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/e708d6ef549044974b60a57fdcec2fa165436d57",
+                "reference": "e708d6ef549044974b60a57fdcec2fa165436d57",
                 "shasum": ""
             },
             "require": {
@@ -1215,7 +1215,55 @@
                 "serialization",
                 "xml"
             ],
-            "time": "2017-09-28T15:17:28+00:00"
+            "time": "2017-10-27T07:15:54+00:00"
+        },
+        {
+            "name": "johnkary/phpunit-speedtrap",
+            "version": "v2.0.0-BETA1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/johnkary/phpunit-speedtrap.git",
+                "reference": "cbd785f67116c581f71705342cb316631e5a2be9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/johnkary/phpunit-speedtrap/zipball/cbd785f67116c581f71705342cb316631e5a2be9",
+                "reference": "cbd785f67116c581f71705342cb316631e5a2be9",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "JohnKary\\PHPUnit\\Listener\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "John Kary",
+                    "email": "john@johnkary.net"
+                }
+            ],
+            "description": "Find slow tests in your PHPUnit test suite",
+            "homepage": "https://github.com/johnkary/phpunit-speedtrap",
+            "keywords": [
+                "phpunit",
+                "profile",
+                "slow"
+            ],
+            "time": "2017-03-17T12:23:15+00:00"
         },
         {
             "name": "justinrainbow/json-schema",
@@ -1452,37 +1500,40 @@
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.6.1",
+            "version": "1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "8e6e04167378abf1ddb4d3522d8755c5fd90d102"
+                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/8e6e04167378abf1ddb4d3522d8755c5fd90d102",
-                "reference": "8e6e04167378abf1ddb4d3522d8755c5fd90d102",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
+                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.0"
+                "php": "^5.6 || ^7.0"
             },
             "require-dev": {
-                "doctrine/collections": "1.*",
-                "phpunit/phpunit": "~4.1"
+                "doctrine/collections": "^1.0",
+                "doctrine/common": "^2.6",
+                "phpunit/phpunit": "^4.1"
             },
             "type": "library",
             "autoload": {
                 "psr-4": {
                     "DeepCopy\\": "src/DeepCopy/"
-                }
+                },
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
                 "MIT"
             ],
             "description": "Create deep copies (clones) of your objects",
-            "homepage": "https://github.com/myclabs/DeepCopy",
             "keywords": [
                 "clone",
                 "copy",
@@ -1490,7 +1541,7 @@
                 "object",
                 "object graph"
             ],
-            "time": "2017-04-12T18:52:22+00:00"
+            "time": "2017-10-19T19:58:43+00:00"
         },
         {
             "name": "nikic/php-parser",
@@ -2489,16 +2540,16 @@
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "5.2.2",
+            "version": "5.2.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "8ed1902a57849e117b5651fc1a5c48110946c06b"
+                "reference": "8e1d2397d8adf59a3f12b2878a3aaa66d1ab189d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/8ed1902a57849e117b5651fc1a5c48110946c06b",
-                "reference": "8ed1902a57849e117b5651fc1a5c48110946c06b",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/8e1d2397d8adf59a3f12b2878a3aaa66d1ab189d",
+                "reference": "8e1d2397d8adf59a3f12b2878a3aaa66d1ab189d",
                 "shasum": ""
             },
             "require": {
@@ -2507,7 +2558,7 @@
                 "php": "^7.0",
                 "phpunit/php-file-iterator": "^1.4.2",
                 "phpunit/php-text-template": "^1.2.1",
-                "phpunit/php-token-stream": "^1.4.11 || ^2.0",
+                "phpunit/php-token-stream": "^2.0",
                 "sebastian/code-unit-reverse-lookup": "^1.0.1",
                 "sebastian/environment": "^3.0",
                 "sebastian/version": "^2.0.1",
@@ -2549,7 +2600,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2017-08-03T12:40:43+00:00"
+            "time": "2017-11-03T13:47:33+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -5539,9 +5590,9 @@
         }
     ],
     "aliases": [],
-    "minimum-stability": "stable",
+    "minimum-stability": "dev",
     "stability-flags": [],
-    "prefer-stable": false,
+    "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
         "php": "^7.0",
diff --git a/tests/phpunit.xml b/tests/phpunit.xml
index 68213eb6..0cc5d78b 100644
--- a/tests/phpunit.xml
+++ b/tests/phpunit.xml
@@ -18,6 +18,14 @@
 <logging>
   <log type="coverage-html" target="coverage" showUncoveredFiles="true"/>
 </logging>
+<listeners>
+    <listener class="JohnKary\PHPUnit\Listener\SpeedTrapListener">
+        <arguments><array>
+            <element key="slowThreshold"><integer>1500</integer></element>
+            <element key="reportLength"><integer>1000</integer></element>
+        </array></arguments>
+    </listener>
+</listeners>
 
 <testsuites>
     <testsuite name="Exceptions">