diff --git a/.gitignore b/.gitignore
index 0b1fb77c0..3db374fdf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,4 @@ phpunit.xml
 .vagrant
 Vagrantfile
 .idea
-.php_cs.cache
+.php-cs-fixer.cache
diff --git a/.php_cs b/.php-cs-fixer.php
similarity index 72%
rename from .php_cs
rename to .php-cs-fixer.php
index 68b16e224..4031efea1 100644
--- a/.php_cs
+++ b/.php-cs-fixer.php
@@ -18,10 +18,8 @@ $finder = PhpCsFixer\Finder::create()
     ->notPath('Fixtures')
 ;
 
-return PhpCsFixer\Config::create()
-    ->setUsingCache(true)
-    ->setRiskyAllowed(true)
-    ->setRules(array(
+$config = new PhpCsFixer\Config();
+return $config->setRules([
         '@PSR2' => true,
         'array_syntax' => array('syntax' => 'long'),
         'binary_operator_spaces' => true,
@@ -29,31 +27,42 @@ return PhpCsFixer\Config::create()
         'cast_spaces' => array('space' => 'single'),
         'header_comment' => array('header' => $header),
         'include' => true,
-        'class_attributes_separation' => array('elements' => array('method')),
+
+        'class_attributes_separation' => array('elements' => array('method' => 'one', 'trait_import' => 'none')),
         'no_blank_lines_after_class_opening' => true,
         'no_blank_lines_after_phpdoc' => true,
         'no_empty_statement' => true,
-        'no_extra_consecutive_blank_lines' => true,
+        'no_extra_blank_lines' => true,
         'no_leading_import_slash' => true,
         'no_leading_namespace_whitespace' => true,
         'no_trailing_comma_in_singleline_array' => true,
-        'no_unused_imports' => true,
         'no_whitespace_in_blank_line' => true,
         'object_operator_without_whitespace' => true,
-        'phpdoc_align' => true,
+        //'phpdoc_align' => true,
         'phpdoc_indent' => true,
         'phpdoc_no_access' => true,
         'phpdoc_no_package' => true,
-        'phpdoc_order' => true,
+        //'phpdoc_order' => true,
         'phpdoc_scalar' => true,
         'phpdoc_trim' => true,
         'phpdoc_types' => true,
-        'psr0' => true,
+        'psr_autoloading' => true,
         'single_blank_line_before_namespace' => true,
         'standardize_not_equals' => true,
         'ternary_operator_spaces' => true,
-        'trailing_comma_in_multiline_array' => true,
+        'trailing_comma_in_multiline' => ['elements' => ['arrays']],
         'unary_operator_spaces' => true,
-    ))
+
+        // imports
+        'no_unused_imports' => true,
+        'fully_qualified_strict_types' => true,
+        'single_line_after_imports' => true,
+        'fully_qualified_strict_types' => true,
+        //'global_namespace_import' => ['import_classes' => true],
+        'no_leading_import_slash' => true,
+        'single_import_per_statement' => true,
+    ])
+    ->setUsingCache(true)
+    ->setRiskyAllowed(true)
     ->setFinder($finder)
 ;
diff --git a/src/Composer/Autoload/PhpFileCleaner.php b/src/Composer/Autoload/PhpFileCleaner.php
index 1d463b285..677f7e978 100644
--- a/src/Composer/Autoload/PhpFileCleaner.php
+++ b/src/Composer/Autoload/PhpFileCleaner.php
@@ -1,5 +1,15 @@
 <?php
 
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Composer\Autoload;
 
 /**
@@ -118,6 +128,7 @@ class PhpFileCleaner
                         && \preg_match($type['pattern'], $this->contents, $match, 0, $this->index - 1)
                     ) {
                         $clean .= $match[0];
+
                         return $clean;
                     }
                 }
@@ -222,6 +233,7 @@ class PhpFileCleaner
                         && $this->match($delimiterPattern)
                     ) {
                         $this->index += $delimiterLength;
+
                         return;
                     }
                     break;
diff --git a/src/Composer/Command/HomeCommand.php b/src/Composer/Command/HomeCommand.php
index d1b66f648..ad4a42713 100644
--- a/src/Composer/Command/HomeCommand.php
+++ b/src/Composer/Command/HomeCommand.php
@@ -138,6 +138,7 @@ EOT
         $process = new ProcessExecutor($this->getIO());
         if (Platform::isWindows()) {
             $process->execute('start "web" explorer ' . $url, $output);
+
             return;
         }
 
diff --git a/src/Composer/Command/LicensesCommand.php b/src/Composer/Command/LicensesCommand.php
index 3f19d366e..5375ab08d 100644
--- a/src/Composer/Command/LicensesCommand.php
+++ b/src/Composer/Command/LicensesCommand.php
@@ -13,7 +13,6 @@
 namespace Composer\Command;
 
 use Composer\Json\JsonFile;
-use Composer\Package\BasePackage;
 use Composer\Package\CompletePackageInterface;
 use Composer\Plugin\CommandEvent;
 use Composer\Plugin\PluginEvents;
diff --git a/src/Composer/Command/SelfUpdateCommand.php b/src/Composer/Command/SelfUpdateCommand.php
index b21f7bf83..c111580e7 100644
--- a/src/Composer/Command/SelfUpdateCommand.php
+++ b/src/Composer/Command/SelfUpdateCommand.php
@@ -113,6 +113,7 @@ EOT
 
         if ($input->getOption('update-keys')) {
             $this->fetchKeys($io, $config);
+
             return 0;
         }
 
diff --git a/src/Composer/DependencyResolver/LockTransaction.php b/src/Composer/DependencyResolver/LockTransaction.php
index e246f2b3d..a3abe1e2a 100644
--- a/src/Composer/DependencyResolver/LockTransaction.php
+++ b/src/Composer/DependencyResolver/LockTransaction.php
@@ -58,7 +58,6 @@ class LockTransaction extends Transaction
         parent::__construct($this->presentMap, $this->resultPackages['all']);
     }
 
-
     // TODO make this a bit prettier instead of the two text indexes?
     /**
      * @return void
diff --git a/src/Composer/DependencyResolver/PoolBuilder.php b/src/Composer/DependencyResolver/PoolBuilder.php
index ef78a44e4..2705f6181 100644
--- a/src/Composer/DependencyResolver/PoolBuilder.php
+++ b/src/Composer/DependencyResolver/PoolBuilder.php
@@ -22,7 +22,6 @@ use Composer\Package\PackageInterface;
 use Composer\Package\Version\StabilityFilter;
 use Composer\Plugin\PluginEvents;
 use Composer\Plugin\PrePoolCreateEvent;
-use Composer\Repository\LockArrayRepository;
 use Composer\Repository\PlatformRepository;
 use Composer\Repository\RepositoryInterface;
 use Composer\Repository\RootPackageRepository;
diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index d714b3702..7d08ec4d5 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -20,7 +20,6 @@ use Composer\Package\Version\VersionGuesser;
 use Composer\Package\RootPackageInterface;
 use Composer\Repository\RepositoryManager;
 use Composer\Repository\RepositoryFactory;
-use Composer\Repository\WritableRepositoryInterface;
 use Composer\Util\Filesystem;
 use Composer\Util\Platform;
 use Composer\Util\ProcessExecutor;
diff --git a/src/Composer/Repository/RepositorySet.php b/src/Composer/Repository/RepositorySet.php
index 019e0d541..44ae258e7 100644
--- a/src/Composer/Repository/RepositorySet.php
+++ b/src/Composer/Repository/RepositorySet.php
@@ -22,8 +22,6 @@ use Composer\Package\BasePackage;
 use Composer\Package\AliasPackage;
 use Composer\Package\CompleteAliasPackage;
 use Composer\Package\CompletePackage;
-use Composer\Package\CompletePackageInterface;
-use Composer\Package\PackageInterface;
 use Composer\Semver\Constraint\ConstraintInterface;
 use Composer\Package\Version\StabilityFilter;
 
diff --git a/src/Composer/Util/ProcessExecutor.php b/src/Composer/Util/ProcessExecutor.php
index 12e7796a2..ddcf13139 100644
--- a/src/Composer/Util/ProcessExecutor.php
+++ b/src/Composer/Util/ProcessExecutor.php
@@ -13,9 +13,7 @@
 namespace Composer\Util;
 
 use Composer\IO\IOInterface;
-use Composer\Util\Platform;
 use Symfony\Component\Process\Process;
-use Symfony\Component\Process\ProcessUtils;
 use Symfony\Component\Process\Exception\RuntimeException;
 use React\Promise\Promise;
 use React\Promise\PromiseInterface;
diff --git a/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php b/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php
index 6b44dc5a8..ab8ae5625 100644
--- a/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php
+++ b/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php
@@ -255,13 +255,13 @@ class ClassMapGeneratorTest extends TestCase
     public function testCreateMapDoesNotHitRegexBacktraceLimit()
     {
         $expected = array(
-            'Foo\\StripNoise'            => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/StripNoise.php',
-            'Foo\\VeryLongHeredoc'       => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongHeredoc.php',
+            'Foo\\StripNoise' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/StripNoise.php',
+            'Foo\\VeryLongHeredoc' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongHeredoc.php',
             'Foo\\ClassAfterLongHereDoc' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongHeredoc.php',
-            'Foo\\VeryLongPHP73Heredoc'  => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongPHP73Heredoc.php',
-            'Foo\\VeryLongPHP73Nowdoc'   => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongPHP73Nowdoc.php',
-            'Foo\\ClassAfterLongNowDoc'  => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongPHP73Nowdoc.php',
-            'Foo\\VeryLongNowdoc'        => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongNowdoc.php',
+            'Foo\\VeryLongPHP73Heredoc' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongPHP73Heredoc.php',
+            'Foo\\VeryLongPHP73Nowdoc' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongPHP73Nowdoc.php',
+            'Foo\\ClassAfterLongNowDoc' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongPHP73Nowdoc.php',
+            'Foo\\VeryLongNowdoc' => realpath(__DIR__) . '/Fixtures/pcrebacktracelimit/VeryLongNowdoc.php',
         );
 
         ini_set('pcre.backtrack_limit', '30000');
diff --git a/tests/Composer/Test/DependencyResolver/SolverTest.php b/tests/Composer/Test/DependencyResolver/SolverTest.php
index 629a399a3..178793b33 100644
--- a/tests/Composer/Test/DependencyResolver/SolverTest.php
+++ b/tests/Composer/Test/DependencyResolver/SolverTest.php
@@ -200,7 +200,7 @@ class SolverTest extends TestCase
      *
      * This is not something that can happen with packages on e.g. Packagist, but custom installers with custom repositories might do something like this;
      * in fact, some PaaSes do the exact thing above, installing binary builds of PHP and extensions as Composer packages with a custom installer in a separate step before the "userland" `composer install`.
-     * 
+     *
      * If version selectors are sufficiently permissive (e.g. "ourcustom/php":"*", "ourcustom/ext-foobar":"*"), then it may happen that the Solver won't pick the highest possible PHP version, as it has already settled on an "ext-foobar" (they're all the same version to the Solver, it doesn't know about the different requirements in each of the otherwise identical packages) if that was listed in "require" before "php".
      * That's "unfixable", and not even broken, behavior (what if the "ext-foobar" has higher versions for the lower "PHP"? who wins then? any combination of the packages is "correct"), but it shouldn't randomly change.
      * This test asserts this behavior to prevent regressions.
diff --git a/tests/Composer/Test/Downloader/GitDownloaderTest.php b/tests/Composer/Test/Downloader/GitDownloaderTest.php
index 6b173e7df..bfdefe055 100644
--- a/tests/Composer/Test/Downloader/GitDownloaderTest.php
+++ b/tests/Composer/Test/Downloader/GitDownloaderTest.php
@@ -151,12 +151,14 @@ class GitDownloaderTest extends TestCase
 
         $process = new ProcessExecutorMock;
         $process->expects(array(
-            array('cmd' => $this->winCompat(sprintf("git clone --mirror -- 'https://example.com/composer/composer' '%s'", $cachePath)), 'callback' => function () use ($cachePath) { @mkdir($cachePath, 0777, true); }),
+            array('cmd' => $this->winCompat(sprintf("git clone --mirror -- 'https://example.com/composer/composer' '%s'", $cachePath)), 'callback' => function () use ($cachePath) {
+                @mkdir($cachePath, 0777, true);
+            }),
             array('cmd' => 'git rev-parse --git-dir', 'stdout' => '.'),
             $this->winCompat('git rev-parse --quiet --verify \'1234567890123456789012345678901234567890^{commit}\''),
             $this->winCompat(sprintf("git clone --no-checkout '%1\$s' 'composerPath' --dissociate --reference '%1\$s' && cd 'composerPath' && git remote set-url origin -- 'https://example.com/composer/composer' && git remote add composer -- 'https://example.com/composer/composer'", $cachePath)),
             'git branch -r',
-            $this->winCompat("(git checkout 'master' -- || git checkout -B 'master' 'composer/master' --) && git reset --hard '1234567890123456789012345678901234567890' --")
+            $this->winCompat("(git checkout 'master' -- || git checkout -B 'master' 'composer/master' --) && git reset --hard '1234567890123456789012345678901234567890' --"),
         ), true);
 
         $downloader = $this->getDownloaderMock(null, $config, $process);
diff --git a/tests/Composer/Test/IO/NullIOTest.php b/tests/Composer/Test/IO/NullIOTest.php
index 2a66807d3..18c5b8361 100644
--- a/tests/Composer/Test/IO/NullIOTest.php
+++ b/tests/Composer/Test/IO/NullIOTest.php
@@ -65,7 +65,9 @@ class NullIOTest extends TestCase
     {
         $io = new NullIO();
 
-        $this->assertEquals('foo', $io->askAndValidate('question', function ($x) { return true; }, null, 'foo'));
+        $this->assertEquals('foo', $io->askAndValidate('question', function ($x) {
+            return true;
+        }, null, 'foo'));
     }
 
     public function testSelect()
diff --git a/tests/Composer/Test/InstallerTest.php b/tests/Composer/Test/InstallerTest.php
index d5959daf8..5c3548336 100644
--- a/tests/Composer/Test/InstallerTest.php
+++ b/tests/Composer/Test/InstallerTest.php
@@ -75,10 +75,10 @@ class InstallerTest extends TestCase
                 switch ($key) {
                     case 'vendor-dir':
                         return 'foo';
-                    case 'lock';
-                    case 'notify-on-install';
+                    case 'lock':
+                    case 'notify-on-install':
                         return true;
-                    case 'platform';
+                    case 'platform':
                         return array();
                 }
 
diff --git a/tests/Composer/Test/Json/ComposerSchemaTest.php b/tests/Composer/Test/Json/ComposerSchemaTest.php
index 24fc50ca1..e45da5df3 100644
--- a/tests/Composer/Test/Json/ComposerSchemaTest.php
+++ b/tests/Composer/Test/Json/ComposerSchemaTest.php
@@ -91,7 +91,6 @@ class ComposerSchemaTest extends TestCase
     }
 
     /**
-     *
      * @param string $json
      * @return mixed
      */
diff --git a/tests/Composer/Test/Json/JsonFileTest.php b/tests/Composer/Test/Json/JsonFileTest.php
index 0f53b2442..93b462f7f 100644
--- a/tests/Composer/Test/Json/JsonFileTest.php
+++ b/tests/Composer/Test/Json/JsonFileTest.php
@@ -370,10 +370,9 @@ class JsonFileTest extends TestCase
     }
 
     /**
-     *
      * @param string $json
      * @param mixed $data
-     * @param integer|null $options
+     * @param int|null $options
      * @return void
      */
     private function assertJsonFormat($json, $data, $options = null)
diff --git a/tests/Composer/Test/Mock/InstallationManagerMock.php b/tests/Composer/Test/Mock/InstallationManagerMock.php
index 33853e357..ed4b33996 100644
--- a/tests/Composer/Test/Mock/InstallationManagerMock.php
+++ b/tests/Composer/Test/Mock/InstallationManagerMock.php
@@ -21,7 +21,6 @@ use Composer\DependencyResolver\Operation\UpdateOperation;
 use Composer\DependencyResolver\Operation\UninstallOperation;
 use Composer\DependencyResolver\Operation\MarkAliasInstalledOperation;
 use Composer\DependencyResolver\Operation\MarkAliasUninstalledOperation;
-use React\Promise\PromiseInterface;
 
 class InstallationManagerMock extends InstallationManager
 {
diff --git a/tests/Composer/Test/Mock/ProcessExecutorMock.php b/tests/Composer/Test/Mock/ProcessExecutorMock.php
index 3c09fdbb6..247f815a8 100644
--- a/tests/Composer/Test/Mock/ProcessExecutorMock.php
+++ b/tests/Composer/Test/Mock/ProcessExecutorMock.php
@@ -45,7 +45,7 @@ class ProcessExecutorMock extends ProcessExecutor
      * @param array<string|array{cmd: string, return?: int, stdout?: string, stderr?: string, callback?: callable}> $expectations
      * @param bool                                                                                                 $strict         set to true if you want to provide *all* expected commands, and not just a subset you are interested in testing
      * @param array{return: int, stdout?: string, stderr?: string}                                                 $defaultHandler default command handler for undefined commands if not in strict mode
-     * 
+     *
      * @return void
      */
     public function expects(array $expectations, $strict = false, array $defaultHandler = array('return' => 0, 'stdout' => '', 'stderr' => ''))
@@ -100,7 +100,6 @@ class ProcessExecutorMock extends ProcessExecutor
     }
 
     /**
-     *
      * @param string $command
      * @param string $cwd
      * @param bool $tty
diff --git a/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php b/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
index 662a84dd8..26dfd9a75 100644
--- a/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
+++ b/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
@@ -16,7 +16,6 @@ use Composer\IO\NullIO;
 use Composer\Factory;
 use Composer\Package\Archiver\ArchiveManager;
 use Composer\Package\CompletePackage;
-use Composer\Package\PackageInterface;
 use Composer\Util\Loop;
 use Composer\Test\Mock\FactoryMock;
 use Composer\Util\ProcessExecutor;
diff --git a/tests/Composer/Test/Package/Loader/RootPackageLoaderTest.php b/tests/Composer/Test/Package/Loader/RootPackageLoaderTest.php
index d83208632..25e74145e 100644
--- a/tests/Composer/Test/Package/Loader/RootPackageLoaderTest.php
+++ b/tests/Composer/Test/Package/Loader/RootPackageLoaderTest.php
@@ -82,7 +82,6 @@ class RootPackageLoaderTest extends TestCase
 
         $this->assertEquals("1.0.0.0", $package->getVersion());
         $this->assertEquals(RootPackage::DEFAULT_PRETTY_VERSION, $package->getPrettyVersion());
-
     }
 
     public function testPrettyVersionForRootPackageInVersionBranch()
@@ -150,7 +149,7 @@ class RootPackageLoaderTest extends TestCase
         $process->expects(array(
             array(
                 'cmd' => 'git branch -a --no-color --no-abbrev -v',
-                'stdout' => "* latest-production 38137d2f6c70e775e137b2d8a7a7d3eaebf7c7e5 Commit message\n  master 4f6ed96b0bc363d2aa4404c3412de1c011f67c66 Commit message\n"
+                'stdout' => "* latest-production 38137d2f6c70e775e137b2d8a7a7d3eaebf7c7e5 Commit message\n  master 4f6ed96b0bc363d2aa4404c3412de1c011f67c66 Commit message\n",
             ),
         ), true);
 
diff --git a/tests/Composer/Test/Package/Version/VersionGuesserTest.php b/tests/Composer/Test/Package/Version/VersionGuesserTest.php
index d932f9223..292c78946 100644
--- a/tests/Composer/Test/Package/Version/VersionGuesserTest.php
+++ b/tests/Composer/Test/Package/Version/VersionGuesserTest.php
@@ -66,7 +66,7 @@ class VersionGuesserTest extends TestCase
         $process->expects(array(
             array(
                 'cmd' => 'git branch -a --no-color --no-abbrev -v',
-                'stdout' => "* master $commitHash Commit message\n(no branch) $anotherCommitHash Commit message\n"
+                'stdout' => "* master $commitHash Commit message\n(no branch) $anotherCommitHash Commit message\n",
             ),
         ), true);
 
@@ -94,7 +94,7 @@ class VersionGuesserTest extends TestCase
             array(
                 'cmd' => 'git branch -a --no-color --no-abbrev -v',
                 // Assumption here is that arbitrary would be the default branch
-                'stdout' => "  arbitrary $commitHash Commit message\n* current $anotherCommitHash Another message\n"
+                'stdout' => "  arbitrary $commitHash Commit message\n* current $anotherCommitHash Another message\n",
             ),
         ), true);
 
@@ -118,11 +118,11 @@ class VersionGuesserTest extends TestCase
         $process->expects(array(
             array(
                 'cmd' => 'git branch -a --no-color --no-abbrev -v',
-                'stdout' => "  arbitrary $commitHash Commit message\n* feature $anotherCommitHash Another message\n"
+                'stdout' => "  arbitrary $commitHash Commit message\n* feature $anotherCommitHash Another message\n",
             ),
             array(
                 'cmd' => 'git rev-list arbitrary..feature',
-                'stdout' => "$anotherCommitHash\n"
+                'stdout' => "$anotherCommitHash\n",
             ),
         ), true);
 
@@ -245,7 +245,6 @@ class VersionGuesserTest extends TestCase
     {
         $commitHash = '03a15d220da53c52eddd5f32ffca64a7b3801bea';
 
-
         $process = new ProcessExecutorMock;
         $process->expects(array(
             array(
diff --git a/tests/Composer/Test/Plugin/PluginInstallerTest.php b/tests/Composer/Test/Plugin/PluginInstallerTest.php
index 4e137b3f4..dc69fbb35 100644
--- a/tests/Composer/Test/Plugin/PluginInstallerTest.php
+++ b/tests/Composer/Test/Plugin/PluginInstallerTest.php
@@ -249,7 +249,7 @@ class PluginInstallerTest extends TestCase
     /**
      * @param string            $newPluginApiVersion
      * @param CompletePackage[] $plugins
-     * 
+     *
      * @return void
      */
     private function setPluginApiVersionWithPlugins($newPluginApiVersion, array $plugins = array())
@@ -407,7 +407,7 @@ class PluginInstallerTest extends TestCase
      * @dataProvider invalidImplementationClassNames
      * @param callable $invalidImplementationClassNames
      * @param string $expect
-     * 
+     *
      * @return void
      */
     public function testQueryingWithInvalidCapabilityClassNameThrows($invalidImplementationClassNames, $expect = 'UnexpectedValueException')
@@ -441,7 +441,7 @@ class PluginInstallerTest extends TestCase
                ->will($this->returnCallback(function () {
                    return array();
                }));
-        
+
         /** @phpstan-ignore-next-line */
         $this->assertNull($this->pm->getPluginCapability($plugin, $capabilityApi));
     }
@@ -449,7 +449,7 @@ class PluginInstallerTest extends TestCase
     /**
      * @dataProvider nonExistingOrInvalidImplementationClassTypes
      * @param callable $wrongImplementationClassTypes
-     * 
+     *
      * @return void
      */
     public function testQueryingWithNonExistingOrWrongCapabilityClassTypesThrows($wrongImplementationClassTypes)
diff --git a/tests/Composer/Test/Repository/PlatformRepositoryTest.php b/tests/Composer/Test/Repository/PlatformRepositoryTest.php
index 6a77fa318..27a9ddbbf 100644
--- a/tests/Composer/Test/Repository/PlatformRepositoryTest.php
+++ b/tests/Composer/Test/Repository/PlatformRepositoryTest.php
@@ -13,7 +13,6 @@
 namespace Composer\Test\Repository;
 
 use Composer\Package\Link;
-use Composer\Package\Package;
 use Composer\Package\PackageInterface;
 use Composer\Repository\PlatformRepository;
 use Composer\Test\TestCase;
diff --git a/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php b/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
index fb07d34f2..d48a8fd1c 100644
--- a/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
+++ b/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
@@ -20,7 +20,6 @@ use Composer\Util\Http\Response;
 use Composer\Test\Mock\ProcessExecutorMock;
 use Composer\Config;
 use Composer\Util\ProcessExecutor;
-use Symfony\Component\Process\Process;
 
 class GitHubDriverTest extends TestCase
 {
diff --git a/tests/Composer/Test/TestCase.php b/tests/Composer/Test/TestCase.php
index 1e6e77c06..8593b4ad5 100644
--- a/tests/Composer/Test/TestCase.php
+++ b/tests/Composer/Test/TestCase.php
@@ -188,6 +188,7 @@ abstract class TestCase extends PolyfillTestCase
             $cmd = preg_replace_callback("/('[^']*')/", function ($m) {
                 // Double-quotes are used only when needed
                 $char = (strpbrk($m[1], " \t^&|<>()") !== false || $m[1] === "''") ? '"' : '';
+
                 return str_replace("'", $char, $m[1]);
             }, $cmd);
         }
diff --git a/tests/Composer/Test/Util/GitHubTest.php b/tests/Composer/Test/Util/GitHubTest.php
index 7a77de092..ed605c3c7 100644
--- a/tests/Composer/Test/Util/GitHubTest.php
+++ b/tests/Composer/Test/Util/GitHubTest.php
@@ -16,8 +16,6 @@ use Composer\Downloader\TransportException;
 use Composer\Util\GitHub;
 use Composer\Util\Http\Response;
 use Composer\Test\TestCase;
-use RecursiveArrayIterator;
-use RecursiveIteratorIterator;
 
 /**
  * @author Rob Bast <rob.bast@gmail.com>
diff --git a/tests/Composer/Test/Util/GitTest.php b/tests/Composer/Test/Util/GitTest.php
index 4dfe653be..d6e74c7b5 100644
--- a/tests/Composer/Test/Util/GitTest.php
+++ b/tests/Composer/Test/Util/GitTest.php
@@ -86,7 +86,6 @@ class GitTest extends TestCase
 
         $this->mockConfig('https');
 
-
         $this->process->expects(array(
             array('cmd' => 'git command', 'return' => 1),
             array('cmd' => 'git --version', 'return' => 0),
diff --git a/tests/Composer/Test/Util/ProcessExecutorTest.php b/tests/Composer/Test/Util/ProcessExecutorTest.php
index 8375f75de..ff2acd82e 100644
--- a/tests/Composer/Test/Util/ProcessExecutorTest.php
+++ b/tests/Composer/Test/Util/ProcessExecutorTest.php
@@ -155,70 +155,70 @@ class ProcessExecutorTest extends TestCase
     {
         return array(
             // empty argument - must be quoted
-            'empty'         => array('', '""', "''"),
+            'empty' => array('', '""', "''"),
 
             // null argument - must be quoted
-            'empty null'    => array(null, '""', "''"),
+            'empty null' => array(null, '""', "''"),
 
             // false argument - must be quoted
-            'empty false'    => array(false, '""', "''"),
+            'empty false' => array(false, '""', "''"),
 
             // unix single-quote must be escaped
-            'unix-sq'       => array("a'bc", "a'bc", "'a'\\''bc'"),
+            'unix-sq' => array("a'bc", "a'bc", "'a'\\''bc'"),
 
             // new lines must be replaced
-            'new lines'     => array("a\nb\nc", '"a b c"', "'a\nb\nc'"),
+            'new lines' => array("a\nb\nc", '"a b c"', "'a\nb\nc'"),
 
             // whitespace <space> must be quoted
-            'ws space'      => array('a b c', '"a b c"', "'a b c'"),
+            'ws space' => array('a b c', '"a b c"', "'a b c'"),
 
             // whitespace <tab> must be quoted
-            'ws tab'        => array("a\tb\tc", "\"a\tb\tc\"", "'a\tb\tc'"),
+            'ws tab' => array("a\tb\tc", "\"a\tb\tc\"", "'a\tb\tc'"),
 
             // no whitespace must not be quoted
-            'no-ws'         => array('abc', 'abc', "'abc'"),
+            'no-ws' => array('abc', 'abc', "'abc'"),
 
             // double-quotes must be backslash-escaped
-            'dq'            => array('a"bc', 'a\^"bc', "'a\"bc'"),
+            'dq' => array('a"bc', 'a\^"bc', "'a\"bc'"),
 
             // double-quotes must be backslash-escaped with preceeding backslashes doubled
-            'dq-bslash'     => array('a\\"bc', 'a\\\\\^"bc', "'a\\\"bc'"),
+            'dq-bslash' => array('a\\"bc', 'a\\\\\^"bc', "'a\\\"bc'"),
 
             // backslashes not preceeding a double-quote are treated as literal
-            'bslash'        => array('ab\\\\c\\', 'ab\\\\c\\', "'ab\\\\c\\'"),
+            'bslash' => array('ab\\\\c\\', 'ab\\\\c\\', "'ab\\\\c\\'"),
 
             // trailing backslashes must be doubled up when the argument is quoted
-            'bslash dq'     => array('a b c\\\\', '"a b c\\\\\\\\"', "'a b c\\\\'"),
+            'bslash dq' => array('a b c\\\\', '"a b c\\\\\\\\"', "'a b c\\\\'"),
 
             // meta: outer double-quotes must be caret-escaped as well
-            'meta dq'       => array('a "b" c', '^"a \^"b\^" c^"', "'a \"b\" c'"),
+            'meta dq' => array('a "b" c', '^"a \^"b\^" c^"', "'a \"b\" c'"),
 
             // meta: percent expansion must be caret-escaped
-            'meta-pc1'      => array('%path%', '^%path^%', "'%path%'"),
+            'meta-pc1' => array('%path%', '^%path^%', "'%path%'"),
 
             // meta: expansion must have two percent characters
-            'meta-pc2'      => array('%path', '%path', "'%path'"),
+            'meta-pc2' => array('%path', '%path', "'%path'"),
 
             // meta: expansion must have have two surrounding percent characters
-            'meta-pc3'      => array('%%path', '%%path', "'%%path'"),
+            'meta-pc3' => array('%%path', '%%path', "'%%path'"),
 
             // meta: bang expansion must be double caret-escaped
-            'meta-bang1'    => array('!path!', '^^!path^^!', "'!path!'"),
+            'meta-bang1' => array('!path!', '^^!path^^!', "'!path!'"),
 
             // meta: bang expansion must have two bang characters
-            'meta-bang2'    => array('!path', '!path', "'!path'"),
+            'meta-bang2' => array('!path', '!path', "'!path'"),
 
             // meta: bang expansion must have two surrounding ang characters
-            'meta-bang3'    => array('!!path', '!!path', "'!!path'"),
+            'meta-bang3' => array('!!path', '!!path', "'!!path'"),
 
             // meta: caret-escaping must escape all other meta chars (triggered by double-quote)
-            'meta-all-dq'   => array('<>"&|()^', '^<^>\^"^&^|^(^)^^', "'<>\"&|()^'"),
+            'meta-all-dq' => array('<>"&|()^', '^<^>\^"^&^|^(^)^^', "'<>\"&|()^'"),
 
             // other meta: no caret-escaping when whitespace in argument
-            'other meta'    => array('<> &| ()^', '"<> &| ()^"', "'<> &| ()^'"),
+            'other meta' => array('<> &| ()^', '"<> &| ()^"', "'<> &| ()^'"),
 
             // other meta: quote escape chars when no whitespace in argument
-            'other-meta'    => array('<>&|()^', '"<>&|()^"', "'<>&|()^'"),
+            'other-meta' => array('<>&|()^', '"<>&|()^"', "'<>&|()^'"),
         );
     }
 }