diff --git a/modules/openapi-generator/src/main/resources/php-slim-server/README.mustache b/modules/openapi-generator/src/main/resources/php-slim-server/README.mustache
index dfb808782b05..5a25a65f2342 100644
--- a/modules/openapi-generator/src/main/resources/php-slim-server/README.mustache
+++ b/modules/openapi-generator/src/main/resources/php-slim-server/README.mustache
@@ -5,7 +5,7 @@
 ## Requirements
 
 * Web server with URL rewriting
-* PHP 5.5.9 or newer
+* PHP 7.0 or newer
 
 This package contains `.htaccess` for Apache configuration.
 If you use another server(Nginx, HHVM, IIS, lighttpd) check out [Web Servers](https://www.slimframework.com/docs/v3/start/web-servers.html) doc.
@@ -30,9 +30,9 @@ $ php -S localhost:8888 -t php-slim-server
 
 ## Run tests
 
-This package uses PHPUnit 4.8 for unit testing and PHP Codesniffer to check source code against user defined coding standard(`phpcsStandard` generator config option).
+This package uses PHPUnit 6 or 7(depends from your PHP version) for unit testing and PHP Codesniffer to check source code against user defined coding standard(`phpcsStandard` generator config option).
 [Test folder]({{testBasePath}}) contains templates which you can fill with real test assertions.
-How to write tests read at [PHPUnit Manual - Chapter 2. Writing Tests for PHPUnit](https://phpunit.de/manual/4.8/en/writing-tests-for-phpunit.html).
+How to write tests read at [PHPUnit Manual - Chapter 2. Writing Tests for PHPUnit](https://phpunit.de/manual/6.5/en/writing-tests-for-phpunit.html).
 How to configure PHP CodeSniffer read at [PHP CodeSniffer Documentation](https://github.com/squizlabs/PHP_CodeSniffer/wiki).
 There is [phplint](https://github.com/overtrue/phplint) tool to check php syntax automatically.
 
diff --git a/modules/openapi-generator/src/main/resources/php-slim-server/api_test.mustache b/modules/openapi-generator/src/main/resources/php-slim-server/api_test.mustache
index 234cbb5a636b..204d183b48c4 100644
--- a/modules/openapi-generator/src/main/resources/php-slim-server/api_test.mustache
+++ b/modules/openapi-generator/src/main/resources/php-slim-server/api_test.mustache
@@ -33,6 +33,7 @@
  */
 namespace {{apiPackage}};
 
+use PHPUnit\Framework\TestCase;
 use {{apiPackage}}\{{classname}};
 
 /**
@@ -45,7 +46,7 @@ use {{apiPackage}}\{{classname}};
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \{{modelPackage}}\{{classname}}
  */
-{{#operations}}class {{classname}}Test extends \PHPUnit_Framework_TestCase
+{{#operations}}class {{classname}}Test extends TestCase
 {
 
     /**
diff --git a/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache b/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache
index 90e61d50f0f3..23fea6c578fa 100644
--- a/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache
+++ b/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache
@@ -1,12 +1,12 @@
 {
   "minimum-stability": "RC",
   "require": {
-    "php": ">=5.5.9",
+    "php": "^7.0",
     "slim/slim": "3.*",
-    "tuupola/slim-basic-auth": "^3.0.0"
+    "tuupola/slim-basic-auth": "^2.0 || ^3.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8",
+    "phpunit/phpunit": "^6.0 || ^7.0",
     "overtrue/phplint": "^1.0",
     "squizlabs/php_codesniffer": "^3.0"
   },
diff --git a/modules/openapi-generator/src/main/resources/php-slim-server/model_test.mustache b/modules/openapi-generator/src/main/resources/php-slim-server/model_test.mustache
index ea2518ef7426..17d1176f2d58 100644
--- a/modules/openapi-generator/src/main/resources/php-slim-server/model_test.mustache
+++ b/modules/openapi-generator/src/main/resources/php-slim-server/model_test.mustache
@@ -35,6 +35,7 @@
  */
 namespace {{modelPackage}};
 
+use PHPUnit\Framework\TestCase;
 use {{modelPackage}}\{{classname}};
 
 /**
@@ -47,7 +48,7 @@ use {{modelPackage}}\{{classname}};
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \{{modelPackage}}\{{classname}}
  */
-class {{classname}}Test extends \PHPUnit_Framework_TestCase
+class {{classname}}Test extends TestCase
 {
 
     /**
diff --git a/modules/openapi-generator/src/main/resources/php-slim-server/phpunit.xml.mustache b/modules/openapi-generator/src/main/resources/php-slim-server/phpunit.xml.mustache
index fb488481dd27..dbddf2737da5 100644
--- a/modules/openapi-generator/src/main/resources/php-slim-server/phpunit.xml.mustache
+++ b/modules/openapi-generator/src/main/resources/php-slim-server/phpunit.xml.mustache
@@ -7,7 +7,8 @@
     convertErrorsToExceptions="true"
     convertNoticesToExceptions="true"
     convertWarningsToExceptions="true"
-    stopOnFailure="false">
+    beStrictAboutTestsThatDoNotTestAnything="false"
+    stopOnFailure="false"
 >
     <testsuites>
         <testsuite name="Apis">
diff --git a/samples/server/petstore-security-test/php-slim/.openapi-generator/VERSION b/samples/server/petstore-security-test/php-slim/.openapi-generator/VERSION
index 6d94c9c2e12a..a65271290834 100644
--- a/samples/server/petstore-security-test/php-slim/.openapi-generator/VERSION
+++ b/samples/server/petstore-security-test/php-slim/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.0-SNAPSHOT
\ No newline at end of file
+3.3.2-SNAPSHOT
\ No newline at end of file
diff --git a/samples/server/petstore-security-test/php-slim/README.md b/samples/server/petstore-security-test/php-slim/README.md
index 20eb0877e193..51b6a30715c7 100644
--- a/samples/server/petstore-security-test/php-slim/README.md
+++ b/samples/server/petstore-security-test/php-slim/README.md
@@ -5,7 +5,7 @@
 ## Requirements
 
 * Web server with URL rewriting
-* PHP 5.5.9 or newer
+* PHP 7.0 or newer
 
 This package contains `.htaccess` for Apache configuration.
 If you use another server(Nginx, HHVM, IIS, lighttpd) check out [Web Servers](https://www.slimframework.com/docs/v3/start/web-servers.html) doc.
@@ -30,9 +30,9 @@ $ php -S localhost:8888 -t php-slim-server
 
 ## Run tests
 
-This package uses PHPUnit 4.8 for unit testing and PHP Codesniffer to check source code against user defined coding standard(`phpcsStandard` generator config option).
+This package uses PHPUnit 6 or 7(depends from your PHP version) for unit testing and PHP Codesniffer to check source code against user defined coding standard(`phpcsStandard` generator config option).
 [Test folder](test) contains templates which you can fill with real test assertions.
-How to write tests read at [PHPUnit Manual - Chapter 2. Writing Tests for PHPUnit](https://phpunit.de/manual/4.8/en/writing-tests-for-phpunit.html).
+How to write tests read at [PHPUnit Manual - Chapter 2. Writing Tests for PHPUnit](https://phpunit.de/manual/6.5/en/writing-tests-for-phpunit.html).
 How to configure PHP CodeSniffer read at [PHP CodeSniffer Documentation](https://github.com/squizlabs/PHP_CodeSniffer/wiki).
 There is [phplint](https://github.com/overtrue/phplint) tool to check php syntax automatically.
 
diff --git a/samples/server/petstore-security-test/php-slim/composer.json b/samples/server/petstore-security-test/php-slim/composer.json
index 1c4e6a790f8e..ee30a8814056 100644
--- a/samples/server/petstore-security-test/php-slim/composer.json
+++ b/samples/server/petstore-security-test/php-slim/composer.json
@@ -1,12 +1,12 @@
 {
   "minimum-stability": "RC",
   "require": {
-    "php": ">=5.5.9",
+    "php": "^7.0",
     "slim/slim": "3.*",
-    "tuupola/slim-basic-auth": "^3.0.0"
+    "tuupola/slim-basic-auth": "^2.0 || ^3.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8",
+    "phpunit/phpunit": "^6.0 || ^7.0",
     "overtrue/phplint": "^1.0",
     "squizlabs/php_codesniffer": "^3.0"
   },
diff --git a/samples/server/petstore-security-test/php-slim/composer.lock b/samples/server/petstore-security-test/php-slim/composer.lock
index 91f98b9ed53c..d0509f8107f9 100644
--- a/samples/server/petstore-security-test/php-slim/composer.lock
+++ b/samples/server/petstore-security-test/php-slim/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": "df189d30a7ab9ec76b4d8994a6cfaec9",
+    "content-hash": "c277335d4b16a38bf6e8c508449533e6",
     "packages": [
         {
             "name": "container-interop/container-interop",
@@ -392,16 +392,16 @@
         },
         {
             "name": "slim/slim",
-            "version": "3.10.0",
+            "version": "3.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/slimphp/Slim.git",
-                "reference": "d8aabeacc3688b25e2f2dd2db91df91ec6fdd748"
+                "reference": "d378e70431e78ee92ee32ddde61ecc72edf5dc0a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/slimphp/Slim/zipball/d8aabeacc3688b25e2f2dd2db91df91ec6fdd748",
-                "reference": "d8aabeacc3688b25e2f2dd2db91df91ec6fdd748",
+                "url": "https://api.github.com/repos/slimphp/Slim/zipball/d378e70431e78ee92ee32ddde61ecc72edf5dc0a",
+                "reference": "d378e70431e78ee92ee32ddde61ecc72edf5dc0a",
                 "shasum": ""
             },
             "require": {
@@ -459,20 +459,20 @@
                 "micro",
                 "router"
             ],
-            "time": "2018-04-19T19:29:08+00:00"
+            "time": "2018-09-16T10:54:21+00:00"
         },
         {
             "name": "tuupola/callable-handler",
-            "version": "0.4.0",
+            "version": "1.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tuupola/callable-handler.git",
-                "reference": "662744a6a4a52235be5bd73ac04de4375eff3fc9"
+                "reference": "8b9d87f88056d4234af317d65612d7b6307a747a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tuupola/callable-handler/zipball/662744a6a4a52235be5bd73ac04de4375eff3fc9",
-                "reference": "662744a6a4a52235be5bd73ac04de4375eff3fc9",
+                "url": "https://api.github.com/repos/tuupola/callable-handler/zipball/8b9d87f88056d4234af317d65612d7b6307a747a",
+                "reference": "8b9d87f88056d4234af317d65612d7b6307a747a",
                 "shasum": ""
             },
             "require": {
@@ -484,8 +484,8 @@
                 "overtrue/phplint": "^1.0",
                 "phpunit/phpunit": "^6.5",
                 "squizlabs/php_codesniffer": "^3.2",
-                "tuupola/http-factory": "^0.4.0",
-                "zendframework/zend-diactoros": "^1.6"
+                "tuupola/http-factory": "^0.4.0|^1.0",
+                "zendframework/zend-diactoros": "^1.6.0|^2.0"
             },
             "type": "library",
             "autoload": {
@@ -512,26 +512,29 @@
                 "psr-15",
                 "psr-7"
             ],
-            "time": "2018-08-02T11:15:40+00:00"
+            "time": "2018-10-12T09:59:35+00:00"
         },
         {
             "name": "tuupola/http-factory",
-            "version": "0.4.2",
+            "version": "1.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tuupola/http-factory.git",
-                "reference": "c7e2712d5c4f49ddae704ae1f42854f437ddb028"
+                "reference": "dd38c41facebdec20b5b4a120cd6380e30720ce8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tuupola/http-factory/zipball/c7e2712d5c4f49ddae704ae1f42854f437ddb028",
-                "reference": "c7e2712d5c4f49ddae704ae1f42854f437ddb028",
+                "url": "https://api.github.com/repos/tuupola/http-factory/zipball/dd38c41facebdec20b5b4a120cd6380e30720ce8",
+                "reference": "dd38c41facebdec20b5b4a120cd6380e30720ce8",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1",
                 "psr/http-factory": "^1.0"
             },
+            "conflict": {
+                "nyholm/psr7": "<1.0"
+            },
             "require-dev": {
                 "http-interop/http-factory-tests": "^0.5.0",
                 "overtrue/phplint": "^1.0",
@@ -552,7 +555,7 @@
                 {
                     "name": "Mika Tuupola",
                     "email": "tuupola@appelsiini.net",
-                    "homepage": "http://www.appelsiini.net/",
+                    "homepage": "https://appelsiini.net/",
                     "role": "Developer"
                 }
             ],
@@ -563,37 +566,37 @@
                 "psr-17",
                 "psr-7"
             ],
-            "time": "2018-08-09T09:02:33+00:00"
+            "time": "2018-10-12T09:32:20+00:00"
         },
         {
             "name": "tuupola/slim-basic-auth",
-            "version": "3.2.0",
+            "version": "3.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tuupola/slim-basic-auth.git",
-                "reference": "e4bbd5e9f609cb6e83264e56f79289fea48c8bbc"
+                "reference": "40f5efe991ac4e2441ee05b830375c02432ff3f8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tuupola/slim-basic-auth/zipball/e4bbd5e9f609cb6e83264e56f79289fea48c8bbc",
-                "reference": "e4bbd5e9f609cb6e83264e56f79289fea48c8bbc",
+                "url": "https://api.github.com/repos/tuupola/slim-basic-auth/zipball/40f5efe991ac4e2441ee05b830375c02432ff3f8",
+                "reference": "40f5efe991ac4e2441ee05b830375c02432ff3f8",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1",
-                "psr/http-message": "^1.0",
+                "psr/http-message": "^1.0.1",
                 "psr/http-server-middleware": "^1.0",
-                "tuupola/callable-handler": "^0.3.0|^0.4.0",
-                "tuupola/http-factory": "^0.4.0"
+                "tuupola/callable-handler": "^0.3.0|^0.4.0|^1.0",
+                "tuupola/http-factory": "^0.4.0|^1.0"
             },
             "require-dev": {
-                "codedungeon/phpunit-result-printer": "^0.6.0",
+                "codedungeon/phpunit-result-printer": "^0.19.14",
                 "equip/dispatch": "^2.0",
-                "overtrue/phplint": "^0.2.4",
+                "overtrue/phplint": "^1.1",
                 "phpstan/phpstan": "^0.9.2",
                 "phpunit/phpunit": "^7.0",
                 "squizlabs/php_codesniffer": "^3.2",
-                "zendframework/zend-diactoros": "^1.3"
+                "zendframework/zend-diactoros": "^1.3|^2.0"
             },
             "type": "library",
             "autoload": {
@@ -620,7 +623,7 @@
                 "psr-15",
                 "psr-7"
             ],
-            "time": "2018-08-07T08:09:49+00:00"
+            "time": "2018-10-15T12:48:00+00:00"
         }
     ],
     "packages-dev": [
@@ -678,6 +681,54 @@
             ],
             "time": "2017-07-22T11:58:36+00:00"
         },
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.8.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8",
+                "reference": "3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "replace": {
+                "myclabs/deep-copy": "self.version"
+            },
+            "require-dev": {
+                "doctrine/collections": "^1.0",
+                "doctrine/common": "^2.6",
+                "phpunit/phpunit": "^7.1"
+            },
+            "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",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "time": "2018-06-11T23:09:50+00:00"
+        },
         {
             "name": "overtrue/phplint",
             "version": "1.1.3",
@@ -731,6 +782,108 @@
             ],
             "time": "2018-06-19T06:30:45+00:00"
         },
+        {
+            "name": "phar-io/manifest",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
+                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-phar": "*",
+                "phar-io/version": "^2.0",
+                "php": "^5.6 || ^7.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "time": "2018-07-08T19:23:20+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/version.git",
+                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/45a2ec53a73c70ce41d55cedef9063630abaf1b6",
+                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.6 || ^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "time": "2018-07-08T19:19:57+00:00"
+        },
         {
             "name": "phpdocumentor/reflection-common",
             "version": "1.0.1",
@@ -948,39 +1101,40 @@
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "2.2.4",
+            "version": "6.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "eabf68b476ac7d0f73793aada060f1c1a9bf8979"
+                "reference": "0685fb6a43aed1b2e09804d1aaf17144c82861f8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/eabf68b476ac7d0f73793aada060f1c1a9bf8979",
-                "reference": "eabf68b476ac7d0f73793aada060f1c1a9bf8979",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/0685fb6a43aed1b2e09804d1aaf17144c82861f8",
+                "reference": "0685fb6a43aed1b2e09804d1aaf17144c82861f8",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3",
-                "phpunit/php-file-iterator": "~1.3",
-                "phpunit/php-text-template": "~1.2",
-                "phpunit/php-token-stream": "~1.3",
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             "suggest": {
                 "ext-uopz": "*"
@@ -1581,7 +1743,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0-dev"
+                    "dev-master": "2.0-dev"
                 }
             },
             "autoload": {
@@ -1604,32 +1766,124 @@
             "keywords": [
                 "global state"
             ],
-            "time": "2015-10-12T03:26:01+00:00"
+            "time": "2017-04-27T15:39:26+00:00"
+        },
+        {
+            "name": "sebastian/object-enumerator",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "sebastian/object-reflector": "^1.1.1",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "time": "2017-08-03T12:35:26+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/773f97c67f28de00d397be301821b06708fca0be",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2017-03-29T09:07:27+00:00"
         },
         {
             "name": "sebastian/recursion-context",
-            "version": "1.0.5",
+            "version": "3.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "b19cc3298482a335a95f3016d2f8a6950f0fbcd7"
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/b19cc3298482a335a95f3016d2f8a6950f0fbcd7",
-                "reference": "b19cc3298482a335a95f3016d2f8a6950f0fbcd7",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.4"
+                "phpunit/phpunit": "^6.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "3.0.x-dev"
                 }
             },
             "autoload": {
@@ -1657,23 +1911,73 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2016-10-03T07:41:43+00:00"
+            "time": "2017-03-03T06:23:57+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
+                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2018-10-04T04:07:39+00:00"
         },
         {
             "name": "sebastian/version",
-            "version": "1.0.6",
+            "version": "2.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/version.git",
-                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6"
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
-                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
                 "shasum": ""
             },
+            "require": {
+                "php": ">=5.6"
+            },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
             "autoload": {
                 "classmap": [
                     "src/"
@@ -1692,20 +1996,71 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21T13:59:46+00:00"
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "squizlabs/php_codesniffer",
+            "version": "3.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
+                "reference": "6ad28354c04b364c3c71a34e4a18b629cc3b231e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/6ad28354c04b364c3c71a34e4a18b629cc3b231e",
+                "reference": "6ad28354c04b364c3c71a34e4a18b629cc3b231e",
+                "shasum": ""
+            },
+            "require": {
+                "ext-simplexml": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+            },
+            "bin": [
+                "bin/phpcs",
+                "bin/phpcbf"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Greg Sherwood",
+                    "role": "lead"
+                }
+            ],
+            "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
+            "homepage": "http://www.squizlabs.com/php-codesniffer",
+            "keywords": [
+                "phpcs",
+                "standards"
+            ],
+            "time": "2018-09-23T23:08:17+00:00"
         },
         {
             "name": "symfony/console",
-            "version": "v4.1.3",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "ca80b8ced97cf07390078b29773dc384c39eee1f"
+                "reference": "dc7122fe5f6113cfaba3b3de575d31112c9aa60b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/ca80b8ced97cf07390078b29773dc384c39eee1f",
-                "reference": "ca80b8ced97cf07390078b29773dc384c39eee1f",
+                "url": "https://api.github.com/repos/symfony/console/zipball/dc7122fe5f6113cfaba3b3de575d31112c9aa60b",
+                "reference": "dc7122fe5f6113cfaba3b3de575d31112c9aa60b",
                 "shasum": ""
             },
             "require": {
@@ -1760,20 +2115,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:24:31+00:00"
+            "time": "2018-10-03T08:15:46+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.1.3",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "e162f1df3102d0b7472805a5a9d5db9fcf0a8068"
+                "reference": "1f17195b44543017a9c9b2d437c670627e96ad06"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/e162f1df3102d0b7472805a5a9d5db9fcf0a8068",
-                "reference": "e162f1df3102d0b7472805a5a9d5db9fcf0a8068",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/1f17195b44543017a9c9b2d437c670627e96ad06",
+                "reference": "1f17195b44543017a9c9b2d437c670627e96ad06",
                 "shasum": ""
             },
             "require": {
@@ -1809,7 +2164,7 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:24:31+00:00"
+            "time": "2018-10-03T08:47:56+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -1930,16 +2285,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v4.1.3",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "f01fc7a4493572f7f506c49dcb50ad01fb3a2f56"
+                "reference": "ee33c0322a8fee0855afcc11fff81e6b1011b529"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/f01fc7a4493572f7f506c49dcb50ad01fb3a2f56",
-                "reference": "f01fc7a4493572f7f506c49dcb50ad01fb3a2f56",
+                "url": "https://api.github.com/repos/symfony/process/zipball/ee33c0322a8fee0855afcc11fff81e6b1011b529",
+                "reference": "ee33c0322a8fee0855afcc11fff81e6b1011b529",
                 "shasum": ""
             },
             "require": {
@@ -1975,24 +2330,24 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:24:31+00:00"
+            "time": "2018-10-02T12:40:59+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.4.14",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "810af2d35fc72b6cf5c01116806d2b65ccaaf2e2"
+                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/810af2d35fc72b6cf5c01116806d2b65ccaaf2e2",
-                "reference": "810af2d35fc72b6cf5c01116806d2b65ccaaf2e2",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/367e689b2fdc19965be435337b50bc8adf2746c9",
+                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8",
+                "php": "^7.1.3",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "conflict": {
@@ -2007,7 +2362,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -2034,7 +2389,47 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:36:10+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -2093,7 +2488,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.5.9"
+        "php": "^7.0"
     },
     "platform-dev": []
 }
diff --git a/samples/server/petstore-security-test/php-slim/lib/Api/FakeApi.php b/samples/server/petstore-security-test/php-slim/lib/Api/FakeApi.php
index e5f473ac0a36..f707f1ffd8e6 100644
--- a/samples/server/petstore-security-test/php-slim/lib/Api/FakeApi.php
+++ b/samples/server/petstore-security-test/php-slim/lib/Api/FakeApi.php
@@ -40,7 +40,7 @@
  */
 class FakeApi extends AbstractApiController
 {
-    
+
     /**
      * PUT testCodeInjectEndRnNR
      * Summary: To test code injection *_/ &#39; \&quot; &#x3D;end -- \\r\\n \\n \\r
diff --git a/samples/server/petstore-security-test/php-slim/phpunit.xml.dist b/samples/server/petstore-security-test/php-slim/phpunit.xml.dist
index 4a44f5ac1462..7a4a5fedbcf1 100644
--- a/samples/server/petstore-security-test/php-slim/phpunit.xml.dist
+++ b/samples/server/petstore-security-test/php-slim/phpunit.xml.dist
@@ -7,7 +7,8 @@
     convertErrorsToExceptions="true"
     convertNoticesToExceptions="true"
     convertWarningsToExceptions="true"
-    stopOnFailure="false">
+    beStrictAboutTestsThatDoNotTestAnything="false"
+    stopOnFailure="false"
 >
     <testsuites>
         <testsuite name="Apis">
@@ -19,8 +20,8 @@
     </testsuites>
     <filter>
         <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">./lib/Api</directory>
-            <directory suffix=".php">./lib/Model</directory>
+            <directory suffix=".php">./lib//Api</directory>
+            <directory suffix=".php">./lib//Model</directory>
         </whitelist>
     </filter>
 </phpunit>
\ No newline at end of file
diff --git a/samples/server/petstore-security-test/php-slim/test/Api/FakeApiTest.php b/samples/server/petstore-security-test/php-slim/test/Api/FakeApiTest.php
index de4df30629fb..5e631afe49e4 100644
--- a/samples/server/petstore-security-test/php-slim/test/Api/FakeApiTest.php
+++ b/samples/server/petstore-security-test/php-slim/test/Api/FakeApiTest.php
@@ -25,6 +25,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\FakeApi;
 
 /**
@@ -37,7 +38,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\FakeApi
  */
-class FakeApiTest extends \PHPUnit_Framework_TestCase
+class FakeApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore-security-test/php-slim/test/Model/ModelReturnTest.php b/samples/server/petstore-security-test/php-slim/test/Model/ModelReturnTest.php
index 036a63c111d9..04cb05e146a3 100644
--- a/samples/server/petstore-security-test/php-slim/test/Model/ModelReturnTest.php
+++ b/samples/server/petstore-security-test/php-slim/test/Model/ModelReturnTest.php
@@ -25,6 +25,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ModelReturn;
 
 /**
@@ -37,7 +38,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ModelReturn
  */
-class ModelReturnTest extends \PHPUnit_Framework_TestCase
+class ModelReturnTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/composer.json b/samples/server/petstore/php-slim/composer.json
index 1c4e6a790f8e..ee30a8814056 100644
--- a/samples/server/petstore/php-slim/composer.json
+++ b/samples/server/petstore/php-slim/composer.json
@@ -1,12 +1,12 @@
 {
   "minimum-stability": "RC",
   "require": {
-    "php": ">=5.5.9",
+    "php": "^7.0",
     "slim/slim": "3.*",
-    "tuupola/slim-basic-auth": "^3.0.0"
+    "tuupola/slim-basic-auth": "^2.0 || ^3.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8",
+    "phpunit/phpunit": "^6.0 || ^7.0",
     "overtrue/phplint": "^1.0",
     "squizlabs/php_codesniffer": "^3.0"
   },
diff --git a/samples/server/petstore/php-slim/composer.lock b/samples/server/petstore/php-slim/composer.lock
index 91f98b9ed53c..d0509f8107f9 100644
--- a/samples/server/petstore/php-slim/composer.lock
+++ b/samples/server/petstore/php-slim/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": "df189d30a7ab9ec76b4d8994a6cfaec9",
+    "content-hash": "c277335d4b16a38bf6e8c508449533e6",
     "packages": [
         {
             "name": "container-interop/container-interop",
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             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21T13:59:46+00:00"
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "squizlabs/php_codesniffer",
+            "version": "3.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
+                "reference": "6ad28354c04b364c3c71a34e4a18b629cc3b231e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/6ad28354c04b364c3c71a34e4a18b629cc3b231e",
+                "reference": "6ad28354c04b364c3c71a34e4a18b629cc3b231e",
+                "shasum": ""
+            },
+            "require": {
+                "ext-simplexml": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+            },
+            "bin": [
+                "bin/phpcs",
+                "bin/phpcbf"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Greg Sherwood",
+                    "role": "lead"
+                }
+            ],
+            "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
+            "homepage": "http://www.squizlabs.com/php-codesniffer",
+            "keywords": [
+                "phpcs",
+                "standards"
+            ],
+            "time": "2018-09-23T23:08:17+00:00"
         },
         {
             "name": "symfony/console",
-            "version": "v4.1.3",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "ca80b8ced97cf07390078b29773dc384c39eee1f"
+                "reference": "dc7122fe5f6113cfaba3b3de575d31112c9aa60b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/ca80b8ced97cf07390078b29773dc384c39eee1f",
-                "reference": "ca80b8ced97cf07390078b29773dc384c39eee1f",
+                "url": "https://api.github.com/repos/symfony/console/zipball/dc7122fe5f6113cfaba3b3de575d31112c9aa60b",
+                "reference": "dc7122fe5f6113cfaba3b3de575d31112c9aa60b",
                 "shasum": ""
             },
             "require": {
@@ -1760,20 +2115,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:24:31+00:00"
+            "time": "2018-10-03T08:15:46+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.1.3",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "e162f1df3102d0b7472805a5a9d5db9fcf0a8068"
+                "reference": "1f17195b44543017a9c9b2d437c670627e96ad06"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/e162f1df3102d0b7472805a5a9d5db9fcf0a8068",
-                "reference": "e162f1df3102d0b7472805a5a9d5db9fcf0a8068",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/1f17195b44543017a9c9b2d437c670627e96ad06",
+                "reference": "1f17195b44543017a9c9b2d437c670627e96ad06",
                 "shasum": ""
             },
             "require": {
@@ -1809,7 +2164,7 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:24:31+00:00"
+            "time": "2018-10-03T08:47:56+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -1930,16 +2285,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v4.1.3",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "f01fc7a4493572f7f506c49dcb50ad01fb3a2f56"
+                "reference": "ee33c0322a8fee0855afcc11fff81e6b1011b529"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/f01fc7a4493572f7f506c49dcb50ad01fb3a2f56",
-                "reference": "f01fc7a4493572f7f506c49dcb50ad01fb3a2f56",
+                "url": "https://api.github.com/repos/symfony/process/zipball/ee33c0322a8fee0855afcc11fff81e6b1011b529",
+                "reference": "ee33c0322a8fee0855afcc11fff81e6b1011b529",
                 "shasum": ""
             },
             "require": {
@@ -1975,24 +2330,24 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:24:31+00:00"
+            "time": "2018-10-02T12:40:59+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.4.14",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "810af2d35fc72b6cf5c01116806d2b65ccaaf2e2"
+                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/810af2d35fc72b6cf5c01116806d2b65ccaaf2e2",
-                "reference": "810af2d35fc72b6cf5c01116806d2b65ccaaf2e2",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/367e689b2fdc19965be435337b50bc8adf2746c9",
+                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8",
+                "php": "^7.1.3",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "conflict": {
@@ -2007,7 +2362,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -2034,7 +2389,47 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:36:10+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -2093,7 +2488,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.5.9"
+        "php": "^7.0"
     },
     "platform-dev": []
 }
diff --git a/samples/server/petstore/php-slim/phpunit.xml.dist b/samples/server/petstore/php-slim/phpunit.xml.dist
index 4a44f5ac1462..7a4a5fedbcf1 100644
--- a/samples/server/petstore/php-slim/phpunit.xml.dist
+++ b/samples/server/petstore/php-slim/phpunit.xml.dist
@@ -7,7 +7,8 @@
     convertErrorsToExceptions="true"
     convertNoticesToExceptions="true"
     convertWarningsToExceptions="true"
-    stopOnFailure="false">
+    beStrictAboutTestsThatDoNotTestAnything="false"
+    stopOnFailure="false"
 >
     <testsuites>
         <testsuite name="Apis">
@@ -19,8 +20,8 @@
     </testsuites>
     <filter>
         <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">./lib/Api</directory>
-            <directory suffix=".php">./lib/Model</directory>
+            <directory suffix=".php">./lib//Api</directory>
+            <directory suffix=".php">./lib//Model</directory>
         </whitelist>
     </filter>
 </phpunit>
\ No newline at end of file
diff --git a/samples/server/petstore/php-slim/test/Api/AnotherFakeApiTest.php b/samples/server/petstore/php-slim/test/Api/AnotherFakeApiTest.php
index fc78f599d529..a41b3878aa88 100644
--- a/samples/server/petstore/php-slim/test/Api/AnotherFakeApiTest.php
+++ b/samples/server/petstore/php-slim/test/Api/AnotherFakeApiTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\AnotherFakeApi;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\AnotherFakeApi
  */
-class AnotherFakeApiTest extends \PHPUnit_Framework_TestCase
+class AnotherFakeApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Api/FakeApiTest.php b/samples/server/petstore/php-slim/test/Api/FakeApiTest.php
index c5f07d79f4c0..76347875b336 100644
--- a/samples/server/petstore/php-slim/test/Api/FakeApiTest.php
+++ b/samples/server/petstore/php-slim/test/Api/FakeApiTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\FakeApi;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\FakeApi
  */
-class FakeApiTest extends \PHPUnit_Framework_TestCase
+class FakeApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Api/FakeClassnameTags123ApiTest.php b/samples/server/petstore/php-slim/test/Api/FakeClassnameTags123ApiTest.php
index e06689f42893..5fce14937ef4 100644
--- a/samples/server/petstore/php-slim/test/Api/FakeClassnameTags123ApiTest.php
+++ b/samples/server/petstore/php-slim/test/Api/FakeClassnameTags123ApiTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\FakeClassnameTags123Api;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\FakeClassnameTags123Api
  */
-class FakeClassnameTags123ApiTest extends \PHPUnit_Framework_TestCase
+class FakeClassnameTags123ApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Api/PetApiTest.php b/samples/server/petstore/php-slim/test/Api/PetApiTest.php
index 9959ad609dda..b6849de70b37 100644
--- a/samples/server/petstore/php-slim/test/Api/PetApiTest.php
+++ b/samples/server/petstore/php-slim/test/Api/PetApiTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\PetApi;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\PetApi
  */
-class PetApiTest extends \PHPUnit_Framework_TestCase
+class PetApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Api/StoreApiTest.php b/samples/server/petstore/php-slim/test/Api/StoreApiTest.php
index f7c02fa1ba09..edc3c6a0e758 100644
--- a/samples/server/petstore/php-slim/test/Api/StoreApiTest.php
+++ b/samples/server/petstore/php-slim/test/Api/StoreApiTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\StoreApi;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\StoreApi
  */
-class StoreApiTest extends \PHPUnit_Framework_TestCase
+class StoreApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Api/UserApiTest.php b/samples/server/petstore/php-slim/test/Api/UserApiTest.php
index 519c10cd0830..a1d09015bb06 100644
--- a/samples/server/petstore/php-slim/test/Api/UserApiTest.php
+++ b/samples/server/petstore/php-slim/test/Api/UserApiTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Api;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Api\UserApi;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\UserApi
  */
-class UserApiTest extends \PHPUnit_Framework_TestCase
+class UserApiTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/AdditionalPropertiesClassTest.php b/samples/server/petstore/php-slim/test/Model/AdditionalPropertiesClassTest.php
index 14d94718ead5..1bfd011e58a5 100644
--- a/samples/server/petstore/php-slim/test/Model/AdditionalPropertiesClassTest.php
+++ b/samples/server/petstore/php-slim/test/Model/AdditionalPropertiesClassTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\AdditionalPropertiesClass;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\AdditionalPropertiesClass
  */
-class AdditionalPropertiesClassTest extends \PHPUnit_Framework_TestCase
+class AdditionalPropertiesClassTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/AnimalFarmTest.php b/samples/server/petstore/php-slim/test/Model/AnimalFarmTest.php
index 93e748a8c6e7..7177a6d1a0ea 100644
--- a/samples/server/petstore/php-slim/test/Model/AnimalFarmTest.php
+++ b/samples/server/petstore/php-slim/test/Model/AnimalFarmTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\AnimalFarm;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\AnimalFarm
  */
-class AnimalFarmTest extends \PHPUnit_Framework_TestCase
+class AnimalFarmTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/AnimalTest.php b/samples/server/petstore/php-slim/test/Model/AnimalTest.php
index bd6e2f4b9763..aef196754b3e 100644
--- a/samples/server/petstore/php-slim/test/Model/AnimalTest.php
+++ b/samples/server/petstore/php-slim/test/Model/AnimalTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Animal;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Animal
  */
-class AnimalTest extends \PHPUnit_Framework_TestCase
+class AnimalTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ApiResponseTest.php b/samples/server/petstore/php-slim/test/Model/ApiResponseTest.php
index ac3378cc3bdb..50520e7a894c 100644
--- a/samples/server/petstore/php-slim/test/Model/ApiResponseTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ApiResponseTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ApiResponse;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ApiResponse
  */
-class ApiResponseTest extends \PHPUnit_Framework_TestCase
+class ApiResponseTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ArrayOfArrayOfNumberOnlyTest.php b/samples/server/petstore/php-slim/test/Model/ArrayOfArrayOfNumberOnlyTest.php
index bbc5077b1ca5..5f1d132bd2ae 100644
--- a/samples/server/petstore/php-slim/test/Model/ArrayOfArrayOfNumberOnlyTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ArrayOfArrayOfNumberOnlyTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ArrayOfArrayOfNumberOnly;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ArrayOfArrayOfNumberOnly
  */
-class ArrayOfArrayOfNumberOnlyTest extends \PHPUnit_Framework_TestCase
+class ArrayOfArrayOfNumberOnlyTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ArrayOfNumberOnlyTest.php b/samples/server/petstore/php-slim/test/Model/ArrayOfNumberOnlyTest.php
index ce575e4b9267..2326fe8647f4 100644
--- a/samples/server/petstore/php-slim/test/Model/ArrayOfNumberOnlyTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ArrayOfNumberOnlyTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ArrayOfNumberOnly;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ArrayOfNumberOnly
  */
-class ArrayOfNumberOnlyTest extends \PHPUnit_Framework_TestCase
+class ArrayOfNumberOnlyTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ArrayTestTest.php b/samples/server/petstore/php-slim/test/Model/ArrayTestTest.php
index 236b83b3a851..b3d91609e89d 100644
--- a/samples/server/petstore/php-slim/test/Model/ArrayTestTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ArrayTestTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ArrayTest;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ArrayTest
  */
-class ArrayTestTest extends \PHPUnit_Framework_TestCase
+class ArrayTestTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/CapitalizationTest.php b/samples/server/petstore/php-slim/test/Model/CapitalizationTest.php
index bbd0bf6a8274..8da2965e3d55 100644
--- a/samples/server/petstore/php-slim/test/Model/CapitalizationTest.php
+++ b/samples/server/petstore/php-slim/test/Model/CapitalizationTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Capitalization;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Capitalization
  */
-class CapitalizationTest extends \PHPUnit_Framework_TestCase
+class CapitalizationTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/CatTest.php b/samples/server/petstore/php-slim/test/Model/CatTest.php
index b534aecf0259..012bbd85483c 100644
--- a/samples/server/petstore/php-slim/test/Model/CatTest.php
+++ b/samples/server/petstore/php-slim/test/Model/CatTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Cat;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Cat
  */
-class CatTest extends \PHPUnit_Framework_TestCase
+class CatTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/CategoryTest.php b/samples/server/petstore/php-slim/test/Model/CategoryTest.php
index 0fb026473842..aa98a1a76c0e 100644
--- a/samples/server/petstore/php-slim/test/Model/CategoryTest.php
+++ b/samples/server/petstore/php-slim/test/Model/CategoryTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Category;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Category
  */
-class CategoryTest extends \PHPUnit_Framework_TestCase
+class CategoryTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ClassModelTest.php b/samples/server/petstore/php-slim/test/Model/ClassModelTest.php
index 74a06642eb4a..da094de92630 100644
--- a/samples/server/petstore/php-slim/test/Model/ClassModelTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ClassModelTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ClassModel;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ClassModel
  */
-class ClassModelTest extends \PHPUnit_Framework_TestCase
+class ClassModelTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ClientTest.php b/samples/server/petstore/php-slim/test/Model/ClientTest.php
index 56c29cc683f7..e0277948fe25 100644
--- a/samples/server/petstore/php-slim/test/Model/ClientTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ClientTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Client;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Client
  */
-class ClientTest extends \PHPUnit_Framework_TestCase
+class ClientTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/DogTest.php b/samples/server/petstore/php-slim/test/Model/DogTest.php
index 93654a68641e..b0842ad51717 100644
--- a/samples/server/petstore/php-slim/test/Model/DogTest.php
+++ b/samples/server/petstore/php-slim/test/Model/DogTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Dog;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Dog
  */
-class DogTest extends \PHPUnit_Framework_TestCase
+class DogTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/EnumArraysTest.php b/samples/server/petstore/php-slim/test/Model/EnumArraysTest.php
index 467139153a2b..270e7173a163 100644
--- a/samples/server/petstore/php-slim/test/Model/EnumArraysTest.php
+++ b/samples/server/petstore/php-slim/test/Model/EnumArraysTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\EnumArrays;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\EnumArrays
  */
-class EnumArraysTest extends \PHPUnit_Framework_TestCase
+class EnumArraysTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/EnumClassTest.php b/samples/server/petstore/php-slim/test/Model/EnumClassTest.php
index 95784e82aedc..29cc1883ec20 100644
--- a/samples/server/petstore/php-slim/test/Model/EnumClassTest.php
+++ b/samples/server/petstore/php-slim/test/Model/EnumClassTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\EnumClass;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\EnumClass
  */
-class EnumClassTest extends \PHPUnit_Framework_TestCase
+class EnumClassTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/EnumTestTest.php b/samples/server/petstore/php-slim/test/Model/EnumTestTest.php
index dc8ae6432805..4ffeb6d34efe 100644
--- a/samples/server/petstore/php-slim/test/Model/EnumTestTest.php
+++ b/samples/server/petstore/php-slim/test/Model/EnumTestTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\EnumTest;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\EnumTest
  */
-class EnumTestTest extends \PHPUnit_Framework_TestCase
+class EnumTestTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/FileSchemaTestClassTest.php b/samples/server/petstore/php-slim/test/Model/FileSchemaTestClassTest.php
index 38bc7db08688..d1ea6dccdf8c 100644
--- a/samples/server/petstore/php-slim/test/Model/FileSchemaTestClassTest.php
+++ b/samples/server/petstore/php-slim/test/Model/FileSchemaTestClassTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\FileSchemaTestClass;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\FileSchemaTestClass
  */
-class FileSchemaTestClassTest extends \PHPUnit_Framework_TestCase
+class FileSchemaTestClassTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/FileTest.php b/samples/server/petstore/php-slim/test/Model/FileTest.php
index 57129a8c54cc..c30c1f5069e9 100644
--- a/samples/server/petstore/php-slim/test/Model/FileTest.php
+++ b/samples/server/petstore/php-slim/test/Model/FileTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\File;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\File
  */
-class FileTest extends \PHPUnit_Framework_TestCase
+class FileTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/FormatTestTest.php b/samples/server/petstore/php-slim/test/Model/FormatTestTest.php
index 90cb8475b1bd..b00d93005562 100644
--- a/samples/server/petstore/php-slim/test/Model/FormatTestTest.php
+++ b/samples/server/petstore/php-slim/test/Model/FormatTestTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\FormatTest;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\FormatTest
  */
-class FormatTestTest extends \PHPUnit_Framework_TestCase
+class FormatTestTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/HasOnlyReadOnlyTest.php b/samples/server/petstore/php-slim/test/Model/HasOnlyReadOnlyTest.php
index d886b0c9643c..72ad8c677dce 100644
--- a/samples/server/petstore/php-slim/test/Model/HasOnlyReadOnlyTest.php
+++ b/samples/server/petstore/php-slim/test/Model/HasOnlyReadOnlyTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\HasOnlyReadOnly;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\HasOnlyReadOnly
  */
-class HasOnlyReadOnlyTest extends \PHPUnit_Framework_TestCase
+class HasOnlyReadOnlyTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/MapTestTest.php b/samples/server/petstore/php-slim/test/Model/MapTestTest.php
index d3c0b8e13610..1ec0b62f1114 100644
--- a/samples/server/petstore/php-slim/test/Model/MapTestTest.php
+++ b/samples/server/petstore/php-slim/test/Model/MapTestTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\MapTest;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\MapTest
  */
-class MapTestTest extends \PHPUnit_Framework_TestCase
+class MapTestTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/MixedPropertiesAndAdditionalPropertiesClassTest.php b/samples/server/petstore/php-slim/test/Model/MixedPropertiesAndAdditionalPropertiesClassTest.php
index 5ee64f596d45..ece54524604a 100644
--- a/samples/server/petstore/php-slim/test/Model/MixedPropertiesAndAdditionalPropertiesClassTest.php
+++ b/samples/server/petstore/php-slim/test/Model/MixedPropertiesAndAdditionalPropertiesClassTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\MixedPropertiesAndAdditionalPropertiesClass;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\MixedPropertiesAndAdditionalPropertiesClass
  */
-class MixedPropertiesAndAdditionalPropertiesClassTest extends \PHPUnit_Framework_TestCase
+class MixedPropertiesAndAdditionalPropertiesClassTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/Model200ResponseTest.php b/samples/server/petstore/php-slim/test/Model/Model200ResponseTest.php
index 36706cf0c2a1..5e7c8e885041 100644
--- a/samples/server/petstore/php-slim/test/Model/Model200ResponseTest.php
+++ b/samples/server/petstore/php-slim/test/Model/Model200ResponseTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Model200Response;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Model200Response
  */
-class Model200ResponseTest extends \PHPUnit_Framework_TestCase
+class Model200ResponseTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ModelListTest.php b/samples/server/petstore/php-slim/test/Model/ModelListTest.php
index c73f1a80e9e3..853b9fe68b88 100644
--- a/samples/server/petstore/php-slim/test/Model/ModelListTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ModelListTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ModelList;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ModelList
  */
-class ModelListTest extends \PHPUnit_Framework_TestCase
+class ModelListTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ModelReturnTest.php b/samples/server/petstore/php-slim/test/Model/ModelReturnTest.php
index 1ba2a4eba69a..cabd691ad495 100644
--- a/samples/server/petstore/php-slim/test/Model/ModelReturnTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ModelReturnTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ModelReturn;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ModelReturn
  */
-class ModelReturnTest extends \PHPUnit_Framework_TestCase
+class ModelReturnTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/NameTest.php b/samples/server/petstore/php-slim/test/Model/NameTest.php
index 70558568c0e2..0c5f54955833 100644
--- a/samples/server/petstore/php-slim/test/Model/NameTest.php
+++ b/samples/server/petstore/php-slim/test/Model/NameTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Name;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Name
  */
-class NameTest extends \PHPUnit_Framework_TestCase
+class NameTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/NumberOnlyTest.php b/samples/server/petstore/php-slim/test/Model/NumberOnlyTest.php
index 38f105510230..2f8b34b4c86e 100644
--- a/samples/server/petstore/php-slim/test/Model/NumberOnlyTest.php
+++ b/samples/server/petstore/php-slim/test/Model/NumberOnlyTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\NumberOnly;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\NumberOnly
  */
-class NumberOnlyTest extends \PHPUnit_Framework_TestCase
+class NumberOnlyTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/OrderTest.php b/samples/server/petstore/php-slim/test/Model/OrderTest.php
index 7542b27a8c6f..d1dd1fe0eea6 100644
--- a/samples/server/petstore/php-slim/test/Model/OrderTest.php
+++ b/samples/server/petstore/php-slim/test/Model/OrderTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Order;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Order
  */
-class OrderTest extends \PHPUnit_Framework_TestCase
+class OrderTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/OuterCompositeTest.php b/samples/server/petstore/php-slim/test/Model/OuterCompositeTest.php
index 4afa5838af27..1ff9ac71c5d3 100644
--- a/samples/server/petstore/php-slim/test/Model/OuterCompositeTest.php
+++ b/samples/server/petstore/php-slim/test/Model/OuterCompositeTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\OuterComposite;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\OuterComposite
  */
-class OuterCompositeTest extends \PHPUnit_Framework_TestCase
+class OuterCompositeTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/OuterEnumTest.php b/samples/server/petstore/php-slim/test/Model/OuterEnumTest.php
index 45e7df7fbed7..3c06e23399e1 100644
--- a/samples/server/petstore/php-slim/test/Model/OuterEnumTest.php
+++ b/samples/server/petstore/php-slim/test/Model/OuterEnumTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\OuterEnum;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\OuterEnum
  */
-class OuterEnumTest extends \PHPUnit_Framework_TestCase
+class OuterEnumTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/PetTest.php b/samples/server/petstore/php-slim/test/Model/PetTest.php
index 0bf28bb70402..c4781db4ff58 100644
--- a/samples/server/petstore/php-slim/test/Model/PetTest.php
+++ b/samples/server/petstore/php-slim/test/Model/PetTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Pet;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Pet
  */
-class PetTest extends \PHPUnit_Framework_TestCase
+class PetTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/ReadOnlyFirstTest.php b/samples/server/petstore/php-slim/test/Model/ReadOnlyFirstTest.php
index d47f78d8bb5a..518f72522096 100644
--- a/samples/server/petstore/php-slim/test/Model/ReadOnlyFirstTest.php
+++ b/samples/server/petstore/php-slim/test/Model/ReadOnlyFirstTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\ReadOnlyFirst;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\ReadOnlyFirst
  */
-class ReadOnlyFirstTest extends \PHPUnit_Framework_TestCase
+class ReadOnlyFirstTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/SpecialModelNameTest.php b/samples/server/petstore/php-slim/test/Model/SpecialModelNameTest.php
index 197e25622de8..c56de38fc195 100644
--- a/samples/server/petstore/php-slim/test/Model/SpecialModelNameTest.php
+++ b/samples/server/petstore/php-slim/test/Model/SpecialModelNameTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\SpecialModelName;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\SpecialModelName
  */
-class SpecialModelNameTest extends \PHPUnit_Framework_TestCase
+class SpecialModelNameTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/StringBooleanMapTest.php b/samples/server/petstore/php-slim/test/Model/StringBooleanMapTest.php
index 41fe1a9f8d5b..151a34bb631b 100644
--- a/samples/server/petstore/php-slim/test/Model/StringBooleanMapTest.php
+++ b/samples/server/petstore/php-slim/test/Model/StringBooleanMapTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\StringBooleanMap;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\StringBooleanMap
  */
-class StringBooleanMapTest extends \PHPUnit_Framework_TestCase
+class StringBooleanMapTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/TagTest.php b/samples/server/petstore/php-slim/test/Model/TagTest.php
index 69f2abeb0b74..c52e39468d3e 100644
--- a/samples/server/petstore/php-slim/test/Model/TagTest.php
+++ b/samples/server/petstore/php-slim/test/Model/TagTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\Tag;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\Tag
  */
-class TagTest extends \PHPUnit_Framework_TestCase
+class TagTest extends TestCase
 {
 
     /**
diff --git a/samples/server/petstore/php-slim/test/Model/UserTest.php b/samples/server/petstore/php-slim/test/Model/UserTest.php
index 7f40f26f10a8..dd89b9008c84 100644
--- a/samples/server/petstore/php-slim/test/Model/UserTest.php
+++ b/samples/server/petstore/php-slim/test/Model/UserTest.php
@@ -24,6 +24,7 @@
  */
 namespace OpenAPIServer\Model;
 
+use PHPUnit\Framework\TestCase;
 use OpenAPIServer\Model\User;
 
 /**
@@ -36,7 +37,7 @@
  * @link     https://github.com/openapitools/openapi-generator
  * @coversDefaultClass \OpenAPIServer\Model\User
  */
-class UserTest extends \PHPUnit_Framework_TestCase
+class UserTest extends TestCase
 {
 
     /**