diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..22d0d82
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+vendor
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,19 @@
+## phpunit-github-actions-printer
+
+> There's a zero-config way to achieve this at [mheap/phpunit-matcher-action](https://github.com/mheap/phpunit-matcher-action)
+
+This is a PHPUnit printer that uses the `::error` and `::warning` functionality of GitHub Actions to add annotiations for failing test runs. It's main differentiator to the above is that it supports adding warnings in addition to errors.
+
+## Usage
+
+Add this printer to your project
+
+```bash
+composer require --dev mheap/phpunit-github-actions-printer
+```
+
+When you run your tests, specify `mheap\GithubActionsReporter\Printer` as the printer to use
+
+```bash
+./vendor/bin/phpunit --printer mheap\\GithubActionsReporter\\Printer /path/to/tests
+```
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..dc1d260
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,21 @@
+{
+    "name": "mheap/phpunit-github-actions-printer",
+    "description": "PHPUnit Printer for adding test failures as annotations on GitHub Actions",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Michael Heap",
+            "email": "m@michaelheap.com"
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "mheap\\GithubActionsReporter\\": "src"
+        }
+    },
+    "require": {},
+    "require-dev": {
+        "phpunit/phpunit": "^8"
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..796cb1d
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1534 @@
+{
+    "_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#installing-dependencies",
+        "This file is @generated automatically"
+    ],
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+            },
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+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpbench/phpbench": "^0.13",
+                "phpstan/phpstan-phpunit": "^0.11",
+                "phpstan/phpstan-shim": "^0.11",
+                "phpunit/phpunit": "^7.0"
+            },
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "time": "2019-10-21T16:45:58+00:00"
+        },
+        {
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+            },
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+            },
+            "replace": {
+                "myclabs/deep-copy": "self.version"
+            },
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+                "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": "2020-01-17T21:11:47+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4"
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+                "shasum": ""
+            },
+            "require": {
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+                "ext-phar": "*",
+                "phar-io/version": "^2.0",
+                "php": "^5.6 || ^7.0"
+            },
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+            "license": [
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+            ],
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+                    "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",
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+                    "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": "2.0.0",
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "authors": [
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+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
+                "FQSEN",
+                "phpDocumentor",
+                "phpdoc",
+                "reflection",
+                "static analysis"
+            ],
+            "time": "2018-08-07T13:53:10+00:00"
+        },
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+            "version": "4.3.4",
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+                "phpdocumentor/type-resolver": "~0.4 || ^1.0.0",
+                "webmozart/assert": "^1.0"
+            },
+            "require-dev": {
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+                "mockery/mockery": "^1.0",
+                "phpdocumentor/type-resolver": "0.4.*",
+                "phpunit/phpunit": "^6.4"
+            },
+            "type": "library",
+            "extra": {
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+                }
+            },
+            "autoload": {
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+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
+            "time": "2019-12-28T18:55:12+00:00"
+        },
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+            "version": "1.0.1",
+            "source": {
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+                "url": "https://github.com/phpDocumentor/TypeResolver.git",
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "authors": [
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+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "description": "A PSR-5 based resolver of Class names, Types and Structural Element Names",
+            "time": "2019-08-22T18:11:29+00:00"
+        },
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+            },
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+            "extra": {
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+                }
+            },
+            "autoload": {
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+                    "Prophecy\\": "src/Prophecy"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Konstantin Kudryashov",
+                    "email": "ever.zet@gmail.com",
+                    "homepage": "http://everzet.com"
+                },
+                {
+                    "name": "Marcello Duarte",
+                    "email": "marcello.duarte@gmail.com"
+                }
+            ],
+            "description": "Highly opinionated mocking framework for PHP 5.3+",
+            "homepage": "https://github.com/phpspec/prophecy",
+            "keywords": [
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+                "Dummy",
+                "fake",
+                "mock",
+                "spy",
+                "stub"
+            ],
+            "time": "2019-12-22T21:05:45+00:00"
+        },
+        {
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+            "version": "7.0.10",
+            "source": {
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+                "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
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+                "sebastian/version": "^2.0.1",
+                "theseer/tokenizer": "^1.1.3"
+            },
+            "require-dev": {
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+            },
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+            },
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+            "license": [
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+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
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+            "homepage": "https://github.com/sebastianbergmann/php-code-coverage",
+            "keywords": [
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+                "testing",
+                "xunit"
+            ],
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+        },
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+            "license": [
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
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+            "keywords": [
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
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+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
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+            "description": "Simple template engine.",
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+            "keywords": [
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+            ],
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+                "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/type",
+            "version": "1.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "3aaaa15fa71d27650d62a948be022fe3b48541a3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/3aaaa15fa71d27650d62a948be022fe3b48541a3",
+                "reference": "3aaaa15fa71d27650d62a948be022fe3b48541a3",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.2"
+            },
+            "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",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "time": "2019-07-02T08:10:15+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
+                "type": "zip",
+                "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/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.13.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.13-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2019-11-27T13:56:44+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "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": "2019-06-13T22:48:21+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/573381c0a64f155a0d9a23f4b0c797194805b925",
+                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0",
+                "symfony/polyfill-ctype": "^1.8"
+            },
+            "conflict": {
+                "vimeo/psalm": "<3.6.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.36 || ^7.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2019-11-24T13:36:37+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": []
+}
diff --git a/src/Printer.php b/src/Printer.php
new file mode 100644
index 0000000..8d7853c
--- /dev/null
+++ b/src/Printer.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace mheap\GithubActionsReporter;
+
+use PHPUnit\Util\Filter;
+use PHPUnit\Framework\Test;
+use PHPUnit\Runner\Version;
+use PHPUnit\Framework\TestResult;
+use PHPUnit\TextUI\ResultPrinter;
+use PHPUnit\Framework\TestFailure;
+
+class Printer extends ResultPrinter
+{
+    protected $currentType = null;
+
+    protected function printHeader(): void
+    {
+    }
+
+    protected function writeProgress(string $progress): void
+    {
+    }
+
+    protected function printFooter(TestResult $result): void
+    {
+    }
+
+    protected function printDefects(array $defects, string $type): void
+    {
+        $this->currentType = $type;
+
+        $i=0;
+        foreach ($defects as $defect) {
+            $this->printDefect($defect, $i++);
+        }
+    }
+
+    protected function printDefectHeader(TestFailure $defect, int $count): void
+    {
+    }
+
+    protected function printDefectTrace(TestFailure $defect): void
+    {
+        $e = $defect->thrownException();
+
+        $firstError = explode(PHP_EOL, (string)$e)[2];
+        list($path, $line) = explode(":", $firstError);
+
+        if (!$path) {
+            list($path, $line) = $this->getReflectionFromTest($defect->getTestName());
+        }
+
+        $message = explode(PHP_EOL, $e->getMessage())[0];
+
+        $this->write("::{$this->getCurrentType()} file={$this->relativePath($path)},line={$line}::{$message}\n");
+    }
+
+    protected function getCurrentType() {
+        if (in_array($this->currentType, ['error', 'failure'])) {
+            return 'error';
+        }
+
+        return 'warning';
+    }
+
+    protected function relativePath(string $path) {
+        return str_replace(getcwd().'/', "", $path);
+    }
+
+    protected function getReflectionFromTest(string $name) {
+        list($klass, $method) = explode("::", $name);
+        $c = new \ReflectionClass($klass);
+        $m = $c->getMethod($method);
+
+        return [$m->getFileName(), $m->getStartLine()];
+    }
+}