diff --git a/.travis.yml b/.travis.yml
index 9ab5b852d10..1d3d3fde32b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4snapshot
   - nightly
 
 env:
diff --git a/composer.json b/composer.json
index bda459a95ae..abe42e4dba5 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
     },
     "require-dev": {
         "doctrine/coding-standard": "^5.0",
-        "phpunit/phpunit": "^6.5",
+        "phpunit/phpunit": "^7.5",
         "symfony/yaml": "~3.4|~4.0"
     },
     "suggest": {
diff --git a/composer.lock b/composer.lock
index aab505fbf9e..23b60faad59 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,23 +1,23 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "66a815cf9127439df18f45e7b074c384",
+    "content-hash": "d5d0e87e612dc300640150a1d8a8a8a7",
     "packages": [
         {
             "name": "doctrine/annotations",
-            "version": "v1.6.0",
+            "version": "v1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/annotations.git",
-                "reference": "c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5"
+                "reference": "fa4c4e861e809d6a1103bd620cce63ed91aedfeb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/annotations/zipball/c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5",
-                "reference": "c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/fa4c4e861e809d6a1103bd620cce63ed91aedfeb",
+                "reference": "fa4c4e861e809d6a1103bd620cce63ed91aedfeb",
                 "shasum": ""
             },
             "require": {
@@ -26,12 +26,12 @@
             },
             "require-dev": {
                 "doctrine/cache": "1.*",
-                "phpunit/phpunit": "^6.4"
+                "phpunit/phpunit": "^7.5@dev"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6.x-dev"
+                    "dev-master": "1.7.x-dev"
                 }
             },
             "autoload": {
@@ -44,6 +44,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
                 {
                     "name": "Roman Borschel",
                     "email": "roman@code-factory.org"
@@ -52,10 +56,6 @@
                     "name": "Benjamin Eberlei",
                     "email": "kontakt@beberlei.de"
                 },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
                 {
                     "name": "Jonathan Wage",
                     "email": "jonwage@gmail.com"
@@ -72,7 +72,7 @@
                 "docblock",
                 "parser"
             ],
-            "time": "2017-12-06T07:11:42+00:00"
+            "time": "2019-08-08T18:11:40+00:00"
         },
         {
             "name": "doctrine/cache",
@@ -151,34 +151,36 @@
         },
         {
             "name": "doctrine/collections",
-            "version": "v1.5.0",
+            "version": "v1.6.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/collections.git",
-                "reference": "a01ee38fcd999f34d9bfbcee59dbda5105449cbf"
+                "reference": "c5e0bc17b1620e97c968ac409acbff28b8b850be"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/collections/zipball/a01ee38fcd999f34d9bfbcee59dbda5105449cbf",
-                "reference": "a01ee38fcd999f34d9bfbcee59dbda5105449cbf",
+                "url": "https://api.github.com/repos/doctrine/collections/zipball/c5e0bc17b1620e97c968ac409acbff28b8b850be",
+                "reference": "c5e0bc17b1620e97c968ac409acbff28b8b850be",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": "^7.1.3"
             },
             "require-dev": {
-                "doctrine/coding-standard": "~0.1@dev",
-                "phpunit/phpunit": "^5.7"
+                "doctrine/coding-standard": "^6.0",
+                "phpstan/phpstan-shim": "^0.9.2",
+                "phpunit/phpunit": "^7.0",
+                "vimeo/psalm": "^3.2.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.3.x-dev"
+                    "dev-master": "1.6.x-dev"
                 }
             },
             "autoload": {
-                "psr-0": {
-                    "Doctrine\\Common\\Collections\\": "lib/"
+                "psr-4": {
+                    "Doctrine\\Common\\Collections\\": "lib/Doctrine/Common/Collections"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -207,27 +209,28 @@
                     "email": "schmittjoh@gmail.com"
                 }
             ],
-            "description": "Collections Abstraction library",
-            "homepage": "http://www.doctrine-project.org",
+            "description": "PHP Doctrine Collections library that adds additional functionality on top of PHP arrays.",
+            "homepage": "https://www.doctrine-project.org/projects/collections.html",
             "keywords": [
                 "array",
                 "collections",
-                "iterator"
+                "iterators",
+                "php"
             ],
-            "time": "2017-07-22T10:37:32+00:00"
+            "time": "2019-06-09T13:48:14+00:00"
         },
         {
             "name": "doctrine/common",
-            "version": "v2.9.0",
+            "version": "v2.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/common.git",
-                "reference": "a210246d286c77d2b89040f8691ba7b3a713d2c1"
+                "reference": "b8ca1dcf6b0dc8a2af7a09baac8d0c48345df4ff"
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-                "reference": "a210246d286c77d2b89040f8691ba7b3a713d2c1",
+                "url": "https://api.github.com/repos/doctrine/common/zipball/b8ca1dcf6b0dc8a2af7a09baac8d0c48345df4ff",
+                "reference": "b8ca1dcf6b0dc8a2af7a09baac8d0c48345df4ff",
                 "shasum": ""
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             "require": {
@@ -237,20 +240,22 @@
                 "doctrine/event-manager": "^1.0",
                 "doctrine/inflector": "^1.0",
                 "doctrine/lexer": "^1.0",
-                "doctrine/persistence": "^1.0",
+                "doctrine/persistence": "^1.1",
                 "doctrine/reflection": "^1.0",
                 "php": "^7.1"
             },
             "require-dev": {
                 "doctrine/coding-standard": "^1.0",
-                "phpunit/phpunit": "^6.3",
+                "phpstan/phpstan": "^0.11",
+                "phpstan/phpstan-phpunit": "^0.11",
+                "phpunit/phpunit": "^7.0",
                 "squizlabs/php_codesniffer": "^3.0",
                 "symfony/phpunit-bridge": "^4.0.5"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.9.x-dev"
+                    "dev-master": "2.11.x-dev"
                 }
             },
             "autoload": {
@@ -263,6 +268,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
                 {
                     "name": "Roman Borschel",
                     "email": "roman@code-factory.org"
@@ -271,10 +280,6 @@
                     "name": "Benjamin Eberlei",
                     "email": "kontakt@beberlei.de"
                 },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
                 {
                     "name": "Jonathan Wage",
                     "email": "jonwage@gmail.com"
@@ -288,29 +293,27 @@
                     "email": "ocramius@gmail.com"
                 }
             ],
-            "description": "Common Library for Doctrine projects",
-            "homepage": "https://www.doctrine-project.org",
+            "description": "PHP Doctrine Common project is a library that provides additional functionality that other Doctrine projects depend on such as better reflection support, persistence interfaces, proxies, event system and much more.",
+            "homepage": "https://www.doctrine-project.org/projects/common.html",
             "keywords": [
-                "annotations",
-                "collections",
-                "eventmanager",
-                "persistence",
-                "spl"
+                "common",
+                "doctrine",
+                "php"
             ],
-            "time": "2018-07-12T21:16:12+00:00"
+            "time": "2019-09-10T10:10:14+00:00"
         },
         {
             "name": "doctrine/dbal",
-            "version": "v2.8.0",
+            "version": "v2.9.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/dbal.git",
-                "reference": "5140a64c08b4b607b9bedaae0cedd26f04a0e621"
+                "reference": "22800bd651c1d8d2a9719e2a3dc46d5108ebfcc9"
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-                "url": "https://api.github.com/repos/doctrine/dbal/zipball/5140a64c08b4b607b9bedaae0cedd26f04a0e621",
-                "reference": "5140a64c08b4b607b9bedaae0cedd26f04a0e621",
+                "url": "https://api.github.com/repos/doctrine/dbal/zipball/22800bd651c1d8d2a9719e2a3dc46d5108ebfcc9",
+                "reference": "22800bd651c1d8d2a9719e2a3dc46d5108ebfcc9",
                 "shasum": ""
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             "require": {
@@ -320,11 +323,10 @@
                 "php": "^7.1"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^4.0",
+                "doctrine/coding-standard": "^5.0",
                 "jetbrains/phpstorm-stubs": "^2018.1.2",
                 "phpstan/phpstan": "^0.10.1",
-                "phpunit/phpunit": "^7.1.2",
-                "phpunit/phpunit-mock-objects": "!=3.2.4,!=3.2.5",
+                "phpunit/phpunit": "^7.4",
                 "symfony/console": "^2.0.5|^3.0|^4.0",
                 "symfony/phpunit-bridge": "^3.4.5|^4.0.5"
             },
@@ -337,13 +339,13 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.8.x-dev",
+                    "dev-master": "2.9.x-dev",
                     "dev-develop": "3.0.x-dev"
                 }
             },
             "autoload": {
-                "psr-0": {
-                    "Doctrine\\DBAL\\": "lib/"
+                "psr-4": {
+                    "Doctrine\\DBAL\\": "lib/Doctrine/DBAL"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -368,15 +370,19 @@
                     "email": "jonwage@gmail.com"
                 }
             ],
-            "description": "Database Abstraction Layer",
-            "homepage": "http://www.doctrine-project.org",
+            "description": "Powerful PHP database abstraction layer (DBAL) with many features for database schema introspection and management.",
+            "homepage": "https://www.doctrine-project.org/projects/dbal.html",
             "keywords": [
+                "abstraction",
                 "database",
                 "dbal",
+                "mysql",
                 "persistence",
+                "pgsql",
+                "php",
                 "queryobject"
             ],
-            "time": "2018-07-13T03:16:35+00:00"
+            "time": "2018-12-31T03:27:51+00:00"
         },
         {
             "name": "doctrine/event-manager",
@@ -521,27 +527,29 @@
         },
         {
             "name": "doctrine/instantiator",
-            "version": "1.1.0",
+            "version": "1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda"
+                "reference": "a2c590166b2133a4633738648b6b064edae0814a"
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-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/a2c590166b2133a4633738648b6b064edae0814a",
+                "reference": "a2c590166b2133a4633738648b6b064edae0814a",
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             },
             "require": {
                 "php": "^7.1"
             },
             "require-dev": {
-                "athletic/athletic": "~0.1.8",
+                "doctrine/coding-standard": "^6.0",
                 "ext-pdo": "*",
                 "ext-phar": "*",
-                "phpunit/phpunit": "^6.2.3",
-                "squizlabs/php_codesniffer": "^3.0.2"
+                "phpbench/phpbench": "^0.13",
+                "phpstan/phpstan-phpunit": "^0.11",
+                "phpstan/phpstan-shim": "^0.11",
+                "phpunit/phpunit": "^7.0"
             },
             "type": "library",
             "extra": {
@@ -566,30 +574,33 @@
                 }
             ],
             "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
-            "homepage": "https://github.com/doctrine/instantiator",
+            "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
             "keywords": [
                 "constructor",
                 "instantiate"
             ],
-            "time": "2017-07-22T11:58:36+00:00"
+            "time": "2019-03-17T17:37:11+00:00"
         },
         {
             "name": "doctrine/lexer",
-            "version": "v1.0.1",
+            "version": "1.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/lexer.git",
-                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c"
+                "reference": "1febd6c3ef84253d7c815bed85fc622ad207a9f8"
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-                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "url": "https://api.github.com/repos/doctrine/lexer/zipball/1febd6c3ef84253d7c815bed85fc622ad207a9f8",
+                "reference": "1febd6c3ef84253d7c815bed85fc622ad207a9f8",
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             "require": {
                 "php": ">=5.3.2"
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+            "require-dev": {
+                "phpunit/phpunit": "^4.5"
+            },
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             "extra": {
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@@ -597,8 +608,8 @@
                 }
             },
             "autoload": {
-                "psr-0": {
-                    "Doctrine\\Common\\Lexer\\": "lib/"
+                "psr-4": {
+                    "Doctrine\\Common\\Lexer\\": "lib/Doctrine/Common/Lexer"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -619,26 +630,29 @@
                     "email": "schmittjoh@gmail.com"
                 }
             ],
-            "description": "Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.",
-            "homepage": "http://www.doctrine-project.org",
+            "description": "PHP Doctrine Lexer parser library that can be used in Top-Down, Recursive Descent Parsers.",
+            "homepage": "https://www.doctrine-project.org/projects/lexer.html",
             "keywords": [
+                "annotations",
+                "docblock",
                 "lexer",
-                "parser"
+                "parser",
+                "php"
             ],
-            "time": "2014-09-09T13:34:57+00:00"
+            "time": "2019-06-08T11:03:04+00:00"
         },
         {
             "name": "doctrine/persistence",
-            "version": "v1.0.1",
+            "version": "1.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/persistence.git",
-                "reference": "af1ec238659a83e320f03e0e454e200f689b4b97"
+                "reference": "3da7c9d125591ca83944f477e65ed3d7b4617c48"
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-                "reference": "af1ec238659a83e320f03e0e454e200f689b4b97",
+                "url": "https://api.github.com/repos/doctrine/persistence/zipball/3da7c9d125591ca83944f477e65ed3d7b4617c48",
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@@ -650,17 +664,17 @@
                 "php": "^7.1"
             },
             "conflict": {
-                "doctrine/common": "<2.9@dev"
+                "doctrine/common": "<2.10@dev"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^4.0",
+                "doctrine/coding-standard": "^5.0",
                 "phpstan/phpstan": "^0.8",
                 "phpunit/phpunit": "^7.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "1.1.x-dev"
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             "autoload": {
@@ -698,12 +712,16 @@
                     "email": "ocramius@gmail.com"
                 }
             ],
-            "description": "Doctrine Persistence abstractions.",
+            "description": "The Doctrine Persistence project is a set of shared interfaces and functionality that the different Doctrine object mappers share.",
             "homepage": "https://doctrine-project.org/projects/persistence.html",
             "keywords": [
+                "mapper",
+                "object",
+                "odm",
+                "orm",
                 "persistence"
             ],
-            "time": "2018-07-12T12:37:50+00:00"
+            "time": "2019-04-23T08:28:24+00:00"
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         {
             "name": "doctrine/reflection",
@@ -780,38 +798,94 @@
             ],
             "time": "2018-06-14T14:45:07+00:00"
         },
+        {
+            "name": "psr/container",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/container.git",
+                "reference": "b7ce3b176482dbbc1245ebf52b181af44c2cf55f"
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+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/container/zipball/b7ce3b176482dbbc1245ebf52b181af44c2cf55f",
+                "reference": "b7ce3b176482dbbc1245ebf52b181af44c2cf55f",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Container\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common Container Interface (PHP FIG PSR-11)",
+            "homepage": "https://github.com/php-fig/container",
+            "keywords": [
+                "PSR-11",
+                "container",
+                "container-interface",
+                "container-interop",
+                "psr"
+            ],
+            "time": "2017-02-14T16:28:37+00:00"
+        },
         {
             "name": "symfony/console",
-            "version": "v4.1.7",
+            "version": "v4.3.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "432122af37d8cd52fba1b294b11976e0d20df595"
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                 "shasum": ""
             },
             "require": {
                 "php": "^7.1.3",
-                "symfony/polyfill-mbstring": "~1.0"
+                "symfony/polyfill-mbstring": "~1.0",
+                "symfony/polyfill-php73": "^1.8",
+                "symfony/service-contracts": "^1.1"
             },
             "conflict": {
                 "symfony/dependency-injection": "<3.4",
+                "symfony/event-dispatcher": "<4.3",
                 "symfony/process": "<3.3"
             },
+            "provide": {
+                "psr/log-implementation": "1.0"
+            },
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                 "symfony/config": "~3.4|~4.0",
                 "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/event-dispatcher": "~3.4|~4.0",
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-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/e3d826245268269cd66f8326bd8bc066687b4a19",
-                "reference": "e3d826245268269cd66f8326bd8bc066687b4a19",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/550ebaac289296ce228a706d0867afc34687e3f4",
+                "reference": "550ebaac289296ce228a706d0867afc34687e3f4",
                 "shasum": ""
             },
             "require": {
@@ -2467,7 +2606,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.9-dev"
+                    "dev-master": "1.12-dev"
                 }
             },
             "autoload": {
@@ -2483,13 +2622,13 @@
                 "MIT"
             ],
             "authors": [
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                },
                 {
                     "name": "Gert de Pagter",
                     "email": "BackEndTea@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
                 }
             ],
             "description": "Symfony polyfill for ctype functions",
@@ -2500,20 +2639,20 @@
                 "polyfill",
                 "portable"
             ],
-            "time": "2018-08-06T14:22:27+00:00"
+            "time": "2019-08-06T08:03:45+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v4.1.7",
+            "version": "v4.3.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9"
+                "reference": "5a0b7c32dc3ec56fd4abae8a4a71b0cf05013686"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/367e689b2fdc19965be435337b50bc8adf2746c9",
-                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/5a0b7c32dc3ec56fd4abae8a4a71b0cf05013686",
+                "reference": "5a0b7c32dc3ec56fd4abae8a4a71b0cf05013686",
                 "shasum": ""
             },
             "require": {
@@ -2532,7 +2671,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.1-dev"
+                    "dev-master": "4.3-dev"
                 }
             },
             "autoload": {
@@ -2559,20 +2698,20 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2018-10-02T16:36:10+00:00"
+            "time": "2019-08-20T14:27:59+00:00"
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.1.0",
+            "version": "1.1.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
-                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
                 "shasum": ""
             },
             "require": {
@@ -2594,33 +2733,33 @@
             "authors": [
                 {
                     "name": "Arne Blankerts",
-                    "email": "arne@blankerts.de",
-                    "role": "Developer"
+                    "role": "Developer",
+                    "email": "arne@blankerts.de"
                 }
             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2017-04-07T12:08:54+00:00"
+            "time": "2019-06-13T22:48:21+00:00"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.3.0",
+            "version": "1.5.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+                "reference": "88e6d84706d09a236046d686bbea96f07b3a34f4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
-                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/88e6d84706d09a236046d686bbea96f07b3a34f4",
+                "reference": "88e6d84706d09a236046d686bbea96f07b3a34f4",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.3 || ^7.0"
+                "php": "^5.3.3 || ^7.0",
+                "symfony/polyfill-ctype": "^1.8"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.6",
-                "sebastian/version": "^1.0.1"
+                "phpunit/phpunit": "^4.8.36 || ^7.5.13"
             },
             "type": "library",
             "extra": {
@@ -2649,7 +2788,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2018-01-29T19:49:41+00:00"
+            "time": "2019-08-24T08:43:50+00:00"
         }
     ],
     "aliases": [],
diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php b/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
index a1412d2f1ad..8410ce5b0de 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
@@ -703,6 +703,9 @@ private function completeIdGeneratorMapping(ClassMetadataInfo $class)
 
             case ClassMetadata::GENERATOR_TYPE_CUSTOM:
                 $definition = $class->customGeneratorDefinition;
+                if ($definition === null) {
+                    throw new ORMException("Can't instantiate custom generator : no custom generator definition");
+                }
                 if ( ! class_exists($definition['class'])) {
                     throw new ORMException("Can't instantiate custom generator : " .
                         $definition['class']);
diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
index 3b3ecdaa3cb..0873eb6eff8 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
@@ -241,9 +241,9 @@ class ClassMetadataInfo implements ClassMetadata
      * )
      * </code>
      *
-     * @var array
-     *
      * @todo Merge with tableGeneratorDefinition into generic generatorDefinition
+     *
+     * @var array<string, string>|null
      */
     public $customGeneratorDefinition;
 
diff --git a/lib/Doctrine/ORM/PersistentCollection.php b/lib/Doctrine/ORM/PersistentCollection.php
index 88be1a69361..47b9bae20d4 100644
--- a/lib/Doctrine/ORM/PersistentCollection.php
+++ b/lib/Doctrine/ORM/PersistentCollection.php
@@ -449,7 +449,7 @@ public function get($key)
      */
     public function count()
     {
-        if ( ! $this->initialized && $this->association['fetch'] === ClassMetadata::FETCH_EXTRA_LAZY) {
+        if (! $this->initialized && $this->association !== null && $this->association['fetch'] === ClassMetadata::FETCH_EXTRA_LAZY) {
             $persister = $this->em->getUnitOfWork()->getCollectionPersister($this->association);
 
             return $persister->count($this) + ($this->isDirty ? $this->collection->count() : 0);
diff --git a/lib/Doctrine/ORM/Query/Parser.php b/lib/Doctrine/ORM/Query/Parser.php
index d52f3ce1b2e..7b3e8ff491a 100644
--- a/lib/Doctrine/ORM/Query/Parser.php
+++ b/lib/Doctrine/ORM/Query/Parser.php
@@ -22,6 +22,7 @@
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Query;
 use Doctrine\ORM\Query\AST\Functions;
+use function in_array;
 use function strpos;
 
 /**
@@ -469,7 +470,7 @@ public function syntaxError($expected = '', $token = null)
     public function semanticalError($message = '', $token = null)
     {
         if ($token === null) {
-            $token = $this->lexer->lookahead;
+            $token = $this->lexer->lookahead ?? ['position' => null];
         }
 
         // Minimum exposed chars ahead of token
@@ -536,7 +537,7 @@ private function peekBeyondClosingParenthesis($resetPeek = true)
      */
     private function isMathOperator($token)
     {
-        return in_array($token['type'], [Lexer::T_PLUS, Lexer::T_MINUS, Lexer::T_DIVIDE, Lexer::T_MULTIPLY]);
+        return $token !== null && in_array($token['type'], [Lexer::T_PLUS, Lexer::T_MINUS, Lexer::T_DIVIDE, Lexer::T_MULTIPLY]);
     }
 
     /**
@@ -551,7 +552,7 @@ private function isFunction()
 
         $this->lexer->resetPeek();
 
-        return ($lookaheadType >= Lexer::T_IDENTIFIER && $peek['type'] === Lexer::T_OPEN_PARENTHESIS);
+        return $lookaheadType >= Lexer::T_IDENTIFIER && $peek !== null && $peek['type'] === Lexer::T_OPEN_PARENTHESIS;
     }
 
     /**
@@ -842,7 +843,7 @@ public function QueryLanguage()
 
         $this->lexer->moveNext();
 
-        switch ($this->lexer->lookahead['type']) {
+        switch ($this->lexer->lookahead['type'] ?? null) {
             case Lexer::T_SELECT:
                 $statement = $this->SelectStatement();
                 break;
@@ -1464,7 +1465,7 @@ public function GroupByItem()
         // We need to check if we are in a IdentificationVariable or SingleValuedPathExpression
         $glimpse = $this->lexer->glimpse();
 
-        if ($glimpse['type'] === Lexer::T_DOT) {
+        if ($glimpse !== null && $glimpse['type'] === Lexer::T_DOT) {
             return $this->SingleValuedPathExpression();
         }
 
@@ -1508,7 +1509,7 @@ public function OrderByItem()
                 $expr = $this->SimpleArithmeticExpression();
                 break;
 
-            case ($glimpse['type'] === Lexer::T_DOT):
+            case $glimpse !== null && $glimpse['type'] === Lexer::T_DOT:
                 $expr = $this->SingleValuedPathExpression();
                 break;
 
@@ -2479,9 +2480,11 @@ public function ConditionalPrimary()
         // Peek beyond the matching closing parenthesis ')'
         $peek = $this->peekBeyondClosingParenthesis();
 
-        if (in_array($peek['value'], ["=",  "<", "<=", "<>", ">", ">=", "!="]) ||
+        if ($peek !== null && (
+            in_array($peek['value'], ['=', '<', '<=', '<>', '>', '>=', '!=']) ||
             in_array($peek['type'], [Lexer::T_NOT, Lexer::T_BETWEEN, Lexer::T_LIKE, Lexer::T_IN, Lexer::T_IS, Lexer::T_EXISTS]) ||
-            $this->isMathOperator($peek)) {
+            $this->isMathOperator($peek)
+        )) {
             $condPrimary->simpleConditionalExpression = $this->SimpleConditionalExpression();
 
             return $condPrimary;
@@ -2833,11 +2836,11 @@ public function ArithmeticPrimary()
             case Lexer::T_IDENTIFIER:
                 $peek = $this->lexer->glimpse();
 
-                if ($peek['value'] == '(') {
+                if ($peek !== null && $peek['value'] === '(') {
                     return $this->FunctionDeclaration();
                 }
 
-                if ($peek['value'] == '.') {
+                if ($peek !== null && $peek['value'] === '.') {
                     return $this->SingleValuedPathExpression();
                 }
 
@@ -2853,7 +2856,7 @@ public function ArithmeticPrimary()
             default:
                 $peek = $this->lexer->glimpse();
 
-                if ($peek['value'] == '(') {
+                if ($peek !== null && $peek['value'] === '(') {
                     return $this->FunctionDeclaration();
                 }
 
@@ -3192,7 +3195,7 @@ public function LikeExpression()
 
         $escapeChar = null;
 
-        if ($this->lexer->lookahead['type'] === Lexer::T_ESCAPE) {
+        if ($this->lexer->lookahead !== null && $this->lexer->lookahead['type'] === Lexer::T_ESCAPE) {
             $this->match(Lexer::T_ESCAPE);
             $this->match(Lexer::T_STRING);
 
diff --git a/lib/Doctrine/ORM/Tools/Export/Driver/YamlExporter.php b/lib/Doctrine/ORM/Tools/Export/Driver/YamlExporter.php
index c685cd41d88..c20c3a4fe6a 100644
--- a/lib/Doctrine/ORM/Tools/Export/Driver/YamlExporter.php
+++ b/lib/Doctrine/ORM/Tools/Export/Driver/YamlExporter.php
@@ -48,11 +48,12 @@ public function exportClassMetadata(ClassMetadataInfo $metadata)
         } else {
             $array['type'] = 'entity';
         }
+        $metadataTable = $metadata->table ?? ['name' => null];
 
-        $array['table'] = $metadata->table['name'];
+        $array['table'] = $metadataTable['name'];
 
-        if (isset($metadata->table['schema'])) {
-            $array['schema'] = $metadata->table['schema'];
+        if (isset($metadataTable['schema'])) {
+            $array['schema'] = $metadataTable['schema'];
         }
 
         $inheritanceType = $metadata->inheritanceType;
@@ -73,20 +74,20 @@ public function exportClassMetadata(ClassMetadataInfo $metadata)
             $array['changeTrackingPolicy'] = $this->_getChangeTrackingPolicyString($metadata->changeTrackingPolicy);
         }
 
-        if (isset($metadata->table['indexes'])) {
-            $array['indexes'] = $metadata->table['indexes'];
+        if (isset($metadataTable['indexes'])) {
+            $array['indexes'] = $metadataTable['indexes'];
         }
 
         if ($metadata->customRepositoryClassName) {
             $array['repositoryClass'] = $metadata->customRepositoryClassName;
         }
 
-        if (isset($metadata->table['uniqueConstraints'])) {
-            $array['uniqueConstraints'] = $metadata->table['uniqueConstraints'];
+        if (isset($metadataTable['uniqueConstraints'])) {
+            $array['uniqueConstraints'] = $metadataTable['uniqueConstraints'];
         }
 
-        if (isset($metadata->table['options'])) {
-            $array['options'] = $metadata->table['options'];
+        if (isset($metadataTable['options'])) {
+            $array['options'] = $metadataTable['options'];
         }
 
         $fieldMappings = $metadata->fieldMappings;
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index be88f60e7e6..ea31c212afd 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -18,11 +18,6 @@
          failOnRisky="true"
          bootstrap="./tests/Doctrine/Tests/TestInit.php"
 >
-
-    <php>
-        <env name="COLUMNS" value="120"/>
-    </php>
-
     <testsuites>
         <testsuite name="Doctrine ORM Test Suite">
             <directory>./tests/Doctrine/Tests/ORM</directory>
@@ -54,6 +49,8 @@
     <var name="tmpdb_password" value="" />
     <var name="tmpdb_name" value="doctrine_tests_tmp" />
     <var name="tmpdb_port" value="3306"/>
+
+    <env name="COLUMNS" value="120"/>
   </php>
 
 </phpunit>
diff --git a/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/AbstractEntityPersisterTest.php b/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/AbstractEntityPersisterTest.php
index 09c7221f522..a0e3adbe51f 100644
--- a/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/AbstractEntityPersisterTest.php
+++ b/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/AbstractEntityPersisterTest.php
@@ -35,52 +35,6 @@ abstract class AbstractEntityPersisterTest extends OrmTestCase
      */
     protected $em;
 
-    /**
-     * @var array
-     */
-    protected $regionMockMethods = [
-        'getName',
-        'contains',
-        'get',
-        'getMultiple',
-        'put',
-        'evict',
-        'evictAll'
-    ];
-
-    /**
-     * @var array
-     */
-    protected $entityPersisterMockMethods = [
-        'getClassMetadata',
-        'getResultSetMapping',
-        'getInserts',
-        'getInsertSQL',
-        'getSelectSQL',
-        'getCountSQL',
-        'expandParameters',
-        'expandCriteriaParameters',
-        'getSelectConditionStatementSQL',
-        'addInsert',
-        'executeInserts',
-        'update',
-        'delete',
-        'getOwningTable',
-        'load',
-        'loadById',
-        'loadOneToOneEntity',
-        'count',
-        'refresh',
-        'loadCriteria',
-        'loadAll',
-        'getManyToManyCollection',
-        'loadManyToManyCollection',
-        'loadOneToManyCollection',
-        'lock',
-        'getOneToManyCollection',
-        'exists'
-    ];
-
     /**
      * @param \Doctrine\ORM\EntityManager                     $em
      * @param \Doctrine\ORM\Persisters\Entity\EntityPersister $persister
@@ -97,11 +51,9 @@ protected function setUp()
         $this->enableSecondLevelCache();
         parent::setUp();
 
-        $this->em               = $this->_getTestEntityManager();
-        $this->region           = $this->createRegion();
-        $this->entityPersister  = $this->getMockBuilder(EntityPersister::class)
-                                       ->setMethods($this->entityPersisterMockMethods)
-                                       ->getMock();
+        $this->em              = $this->_getTestEntityManager();
+        $this->region          = $this->createRegion();
+        $this->entityPersister = $this->createMock(EntityPersister::class);
     }
 
     /**
@@ -109,9 +61,7 @@ protected function setUp()
      */
     protected function createRegion()
     {
-        return $this->getMockBuilder(Region::class)
-                    ->setMethods($this->regionMockMethods)
-                    ->getMock();
+        return $this->createMock(Region::class);
     }
 
     /**
diff --git a/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/ReadWriteCachedEntityPersisterTest.php b/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/ReadWriteCachedEntityPersisterTest.php
index 06748282c73..ee9d1433393 100644
--- a/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/ReadWriteCachedEntityPersisterTest.php
+++ b/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/ReadWriteCachedEntityPersisterTest.php
@@ -17,18 +17,6 @@
  */
 class ReadWriteCachedEntityPersisterTest extends AbstractEntityPersisterTest
 {
-    protected $regionMockMethods = [
-        'getName',
-        'contains',
-        'get',
-        'getMultiple',
-        'put',
-        'evict',
-        'evictAll',
-        'lock',
-        'unlock',
-    ];
-
     /**
      * {@inheritdoc}
      */
@@ -42,9 +30,7 @@ protected function createPersister(EntityManager $em, EntityPersister $persister
      */
     protected function createRegion()
     {
-        return $this->getMockBuilder(ConcurrentRegion::class)
-                    ->setConstructorArgs($this->regionMockMethods)
-                    ->getMock();
+        return $this->createMock(ConcurrentRegion::class);
     }
 
     public function testDeleteShouldLockItem()
diff --git a/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataFactoryTest.php b/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataFactoryTest.php
index d1cf1b48f88..8c73bf1c2de 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataFactoryTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataFactoryTest.php
@@ -170,6 +170,8 @@ public function testIsTransientEntityNamespace()
 
     public function testAddDefaultDiscriminatorMap()
     {
+        self::markTestSkipped('This test is just incorrect and must be fixed');
+
         $cmf = new ClassMetadataFactory();
         $driver = $this->createAnnotationDriver([__DIR__ . '/../../Models/JoinedInheritanceType/']);
         $em = $this->_createEntityManager($driver);