diff --git a/.appveyor.yml b/.appveyor.yml
new file mode 100644
index 000000000..5892aabc1
--- /dev/null
+++ b/.appveyor.yml
@@ -0,0 +1,44 @@
+build: false
+platform:
+  - x64
+clone_folder: c:\projects\box
+version: '{build}.{branch}'
+
+environment:
+  matrix:
+  - PHP_VERSION: 7.1
+  - PHP_VERSION: 7.2
+
+cache:
+    - '%LOCALAPPDATA%\Composer\files'
+    - composer.phar
+    - C:\ProgramData\chocolatey\bin -> .appveyor.yml
+    - C:\ProgramData\chocolatey\lib -> .appveyor.yml
+    - c:\tools\php -> .appveyor.yml
+
+init:
+    - SET PATH=C:\Program Files\OpenSSL;c:\tools\php\%PHP_VERSION%;%PATH%
+    - SET COMPOSER_NO_INTERACTION=1
+    - REG ADD "HKEY_CURRENT_USER\Software\Microsoft\Command Processor" /v DelayedExpansion /t REG_DWORD /d 1 /f
+
+install:
+    - IF NOT EXIST c:\php mkdir c:\php
+    - IF NOT EXIST c:\php\%PHP_VERSION% mkdir c:\php\%PHP_VERSION%
+    - ps: appveyor-retry cinst --params '""/InstallDir:C:\tools\php\%PHP_VERSION%""' --ignore-checksums -y php --version ((choco search php --exact --all-versions -r | select-string -pattern $env:PHP_VERSION | sort { [version]($_ -split '\|' | select -last 1) } -Descending | Select-Object -first 1) -replace '[php|]','')
+    - cd c:\tools\php\%PHP_VERSION%
+    - copy php.ini-production php.ini /Y
+    - echo date.timezone="UTC" >> php.ini
+    - echo extension_dir=ext >> php.ini
+    - echo extension=php_openssl.dll >> php.ini
+    - echo extension=php_mbstring.dll >> php.ini
+    - echo extension=php_fileinfo.dll >> php.ini
+    - echo extension=php_bz2.dll >> php.ini
+    - cd c:\projects\box
+    - IF NOT EXIST composer.phar (appveyor-retry appveyor DownloadFile https://github.com/composer/composer/releases/download/1.7.1/composer.phar)
+    - php composer.phar self-update
+    - IF %APPVEYOR_REPO_BRANCH%==master (SET COMPOSER_ROOT_VERSION=dev-master) ELSE (SET COMPOSER_ROOT_VERSION=%APPVEYOR_REPO_BRANCH%.x-dev)
+    - appveyor-retry php composer.phar install --no-interaction --no-progress --no-suggest --prefer-dist
+
+test_script:
+    - cd c:\projects\box
+    - bin\phpunit
diff --git a/src/Test/FileSystemTestCase.php b/src/Test/FileSystemTestCase.php
index 773f503d9..537bc402f 100644
--- a/src/Test/FileSystemTestCase.php
+++ b/src/Test/FileSystemTestCase.php
@@ -34,6 +34,11 @@ abstract class FileSystemTestCase extends TestCase
      */
     protected $tmp;
 
+    /**
+     * @var string
+     */
+    protected $ds = DIRECTORY_SEPARATOR;
+
     /**
      * {@inheritdoc}
      */
@@ -75,7 +80,7 @@ final protected function normalizePaths(array $files): array
         $files = array_values(
             array_map(
                 function (string $file) use ($root): string {
-                    return str_replace($root.DIRECTORY_SEPARATOR, '', $file);
+                    return str_replace([$root.DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR], ['', '/'], $file);
                 },
                 $files
             )
diff --git a/tests/Composer/ComposerConfigurationTest.php b/tests/Composer/ComposerConfigurationTest.php
index 3b9e445db..d86ccc8e4 100644
--- a/tests/Composer/ComposerConfigurationTest.php
+++ b/tests/Composer/ComposerConfigurationTest.php
@@ -228,12 +228,12 @@ public function test_it_can_retrieve_the_dev_packages_found_in_the_lock_file():
         $decodedComposerJson = [];
         $decodedComposerLock = json_decode(self::COMPOSER_LOCK_SAMPLE, true);
 
-        mkdir('vendor/bamarni/composer-bin-plugin');
-        mkdir('vendor/doctrine/instantiator');
+        mkdir("vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin");
+        mkdir("vendor{$this->ds}doctrine{$this->ds}instantiator");
 
         $expected = [
-            $this->tmp.'/vendor/bamarni/composer-bin-plugin',
-            $this->tmp.'/vendor/doctrine/instantiator',
+            $this->tmp."{$this->ds}vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin",
+            $this->tmp."{$this->ds}vendor{$this->ds}doctrine{$this->ds}instantiator",
         ];
 
         $actual = ComposerConfiguration::retrieveDevPackages($this->tmp, $decodedComposerJson, $decodedComposerLock);
@@ -246,12 +246,12 @@ public function test_it_can_retrieve_the_dev_packages_found_in_the_lock_file_2()
         $decodedComposerJson = ['config' => []];
         $decodedComposerLock = json_decode(self::COMPOSER_LOCK_SAMPLE, true);
 
-        mkdir('vendor/bamarni/composer-bin-plugin');
-        mkdir('vendor/doctrine/instantiator');
+        mkdir("vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin");
+        mkdir("vendor{$this->ds}doctrine{$this->ds}instantiator");
 
         $expected = [
-            $this->tmp.'/vendor/bamarni/composer-bin-plugin',
-            $this->tmp.'/vendor/doctrine/instantiator',
+            $this->tmp."{$this->ds}vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin",
+            $this->tmp."{$this->ds}vendor{$this->ds}doctrine{$this->ds}instantiator",
         ];
 
         $actual = ComposerConfiguration::retrieveDevPackages($this->tmp, $decodedComposerJson, $decodedComposerLock);
@@ -264,11 +264,11 @@ public function test_it_ignores_non_existent_dev_packages_found_in_the_lock_file
         $decodedComposerJson = [];
         $decodedComposerLock = json_decode(self::COMPOSER_LOCK_SAMPLE, true);
 
-        mkdir('vendor/bamarni/composer-bin-plugin');
+        mkdir("vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin");
         // Doctrine Instantiator vendor does not exists
 
         $expected = [
-            $this->tmp.'/vendor/bamarni/composer-bin-plugin',
+            $this->tmp."{$this->ds}vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin",
         ];
 
         $actual = ComposerConfiguration::retrieveDevPackages($this->tmp, $decodedComposerJson, $decodedComposerLock);
@@ -285,11 +285,11 @@ public function test_it_can_retrieve_the_dev_packages_found_in_the_lock_file_in_
         ];
         $decodedComposerLock = json_decode(self::COMPOSER_LOCK_SAMPLE, true);
 
-        mkdir('custom-vendor/bamarni/composer-bin-plugin');
-        mkdir('vendor/doctrine/instantiator');  // Wrong directory
+        mkdir("custom-vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin");
+        mkdir("vendor{$this->ds}doctrine{$this->ds}instantiator");  // Wrong directory
 
         $expected = [
-            $this->tmp.'/custom-vendor/bamarni/composer-bin-plugin',
+            $this->tmp."{$this->ds}custom-vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin",
         ];
 
         $actual = ComposerConfiguration::retrieveDevPackages($this->tmp, $decodedComposerJson, $decodedComposerLock);
@@ -404,8 +404,8 @@ public function test_it_can_retrieve_the_dev_packages_found_in_the_lock_file_eve
             true
         );
 
-        mkdir('custom-vendor/bamarni/composer-bin-plugin');
-        mkdir('vendor/doctrine/instantiator');  // Wrong directory
+        mkdir("custom-vendor{$this->ds}bamarni{$this->ds}composer-bin-plugin");
+        mkdir("vendor{$this->ds}doctrine{$this->ds}instantiator");  // Wrong directory
 
         $expected = [];
 
diff --git a/tests/ConfigurationFileTest.php b/tests/ConfigurationFileTest.php
index f93cd899c..09e7d9b38 100644
--- a/tests/ConfigurationFileTest.php
+++ b/tests/ConfigurationFileTest.php
@@ -1126,7 +1126,7 @@ public function test_the_blacklist_input_may_refer_to_non_existent_paths(): void
     {
         $this->setConfig([
             'blacklist' => [
-                '/nowhere',
+                ($this->isWindows() ? 'C:' : '') . '/nowhere',
             ],
         ]);
 
diff --git a/tests/RequirementChecker/RequirementsDumperTest.php b/tests/RequirementChecker/RequirementsDumperTest.php
index 0abfeba09..0c7c9e644 100644
--- a/tests/RequirementChecker/RequirementsDumperTest.php
+++ b/tests/RequirementChecker/RequirementsDumperTest.php
@@ -14,14 +14,14 @@
 
 namespace KevinGH\Box\RequirementChecker;
 
+use KevinGH\Box\Test\FileSystemTestCase;
 use Phar;
-use PHPUnit\Framework\TestCase;
 use function array_column;
 
 /**
  * @covers \KevinGH\Box\RequirementChecker\RequirementsDumper
  */
-class RequirementsDumperTest extends TestCase
+class RequirementsDumperTest extends FileSystemTestCase
 {
     /**
      * @dataProvider provideJsonAndLockContents
@@ -75,7 +75,7 @@ public function test_it_dumps_the_requirement_checker_files(
 
         $this->assertSame(
             $expectedFiles,
-            array_column($checkFiles, 0)
+            $this->normalizePaths(array_column($checkFiles, 0))
         );
 
         $this->assertSame($expectedRequirement, $checkFiles[0][1]);