diff --git a/src/Composer/Downloader/PerforceDownloader.php b/src/Composer/Downloader/PerforceDownloader.php
index 9d3e31e06..ad94d1ad8 100644
--- a/src/Composer/Downloader/PerforceDownloader.php
+++ b/src/Composer/Downloader/PerforceDownloader.php
@@ -33,7 +33,7 @@ class PerforceDownloader extends VcsDownloader
         $ref = $package->getSourceReference();
         $label = $package->getPrettyVersion();
 
-        $this->io->write("    Cloning " . $ref);
+        $this->io->write('    Cloning ' . $ref);
         $this->initPerforce($package, $path, $ref);
         $this->perforce->setStream($ref);
         $this->perforce->queryP4User($this->io);
@@ -74,7 +74,7 @@ class PerforceDownloader extends VcsDownloader
      */
     public function getLocalChanges(PackageInterface $package, $path)
     {
-        $this->io->write("Perforce driver does not check for local changes before overriding", true);
+        $this->io->write('Perforce driver does not check for local changes before overriding', true);
         return;
     }
 
diff --git a/src/Composer/Repository/Vcs/PerforceDriver.php b/src/Composer/Repository/Vcs/PerforceDriver.php
index b6e94c597..03acd0a21 100644
--- a/src/Composer/Repository/Vcs/PerforceDriver.php
+++ b/src/Composer/Repository/Vcs/PerforceDriver.php
@@ -35,7 +35,7 @@ class PerforceDriver extends VcsDriver
     public function initialize()
     {
         $this->depot = $this->repoConfig['depot'];
-        $this->branch = "";
+        $this->branch = '';
         if (isset($this->repoConfig['branch'])) {
             $this->branch = $this->repoConfig['branch'];
         }
@@ -56,7 +56,7 @@ class PerforceDriver extends VcsDriver
             return;
         }
 
-        $repoDir = $this->config->get('cache-vcs-dir') . "/$this->depot";
+        $repoDir = $this->config->get('cache-vcs-dir') . '/' . $this->depot;
         $this->perforce = Perforce::createPerforce($repoConfig, $this->getUrl(), $repoDir, $this->process);
     }
 
@@ -139,7 +139,7 @@ class PerforceDriver extends VcsDriver
      */
     public function hasComposerFile($identifier)
     {
-        $this->composerInfo = $this->perforce->getComposerInformation("//$this->depot/$identifier");
+        $this->composerInfo = $this->perforce->getComposerInformation('//' . $this->depot . '/' . $identifier);
         $this->composerInfoIdentifier = $identifier;
         $result = false;
         if (isset($this->composerInfo)) {
diff --git a/src/Composer/Util/Perforce.php b/src/Composer/Util/Perforce.php
index d5d940e8f..eedc204c9 100644
--- a/src/Composer/Util/Perforce.php
+++ b/src/Composer/Util/Perforce.php
@@ -76,7 +76,7 @@ class Perforce
         if (isset($repoConfig['p4user'])) {
             $this->p4User = $repoConfig['p4user'];
         } else {
-            $this->p4User = $this->getP4variable("P4USER");
+            $this->p4User = $this->getP4variable('P4USER');
         }
         if (isset($repoConfig['p4password'])) {
             $this->p4Password = $repoConfig['p4password'];
@@ -101,7 +101,7 @@ class Perforce
     public function cleanupClientSpec()
     {
         $client = $this->getClient();
-        $command = "p4 client -d $client";
+        $command = 'p4 client -d $client';
         $this->executeCommand($command);
         $clientSpec = $this->getP4ClientSpec();
         $fileSystem = new FileSystem($this->process);
@@ -119,8 +119,8 @@ class Perforce
     public function getClient()
     {
         if (!isset($this->p4Client)) {
-            $cleanStreamName = str_replace("@", "", str_replace("/", "_", str_replace("//", "", $this->getStream())));
-            $this->p4Client = "composer_perforce_" . $this->uniquePerforceClientName . "_" . $cleanStreamName;
+            $cleanStreamName = str_replace('@', '', str_replace('/', '_', str_replace('//', '', $this->getStream())));
+            $this->p4Client = 'composer_perforce_' . $this->uniquePerforceClientName . '_' . $cleanStreamName;
         }
 
         return $this->p4Client;
@@ -139,25 +139,25 @@ class Perforce
     public function setStream($stream)
     {
         $this->p4Stream = $stream;
-        $index = strrpos($stream, "/");
+        $index = strrpos($stream, '/');
         //Stream format is //depot/stream, while non-streaming depot is //depot
         if ($index > 2) {
-            $this->p4DepotType = "stream";
+            $this->p4DepotType = 'stream';
         }
     }
 
     public function isStream()
     {
-        return (strcmp($this->p4DepotType, "stream") === 0);
+        return (strcmp($this->p4DepotType, 'stream') === 0);
     }
 
     public function getStream()
     {
         if (!isset($this->p4Stream)) {
             if ($this->isStream()) {
-                $this->p4Stream = "//$this->p4Depot/$this->p4Branch";
+                $this->p4Stream = '//' . $this->p4Depot . '/' . $this->p4Branch;
             } else {
-                $this->p4Stream = "//$this->p4Depot";
+                $this->p4Stream = '//' . $this->p4Depot;
             }
         }
         return $this->p4Stream;
@@ -165,7 +165,7 @@ class Perforce
 
     public function getStreamWithoutLabel($stream)
     {
-        $index = strpos($stream, "@");
+        $index = strpos($stream, '@');
         if ($index === false) {
             return $stream;
         }
@@ -175,7 +175,7 @@ class Perforce
 
     public function getP4ClientSpec()
     {
-        $p4clientSpec = $this->path . "/" . $this->getClient() . ".p4.spec";
+        $p4clientSpec = $this->path . '/' . $this->getClient() . '.p4.spec';
 
         return $p4clientSpec;
     }
@@ -191,15 +191,15 @@ class Perforce
         if (strlen($this->p4User) > 0) {
             return;
         }
-        $this->p4User = $this->getP4variable("P4USER");
+        $this->p4User = $this->getP4variable('P4USER');
         if (strlen($this->p4User) > 0) {
             return;
         }
-        $this->p4User = $io->ask("Enter P4 User:");
+        $this->p4User = $io->ask('Enter P4 User:');
         if ($this->windowsFlag) {
-            $command = "p4 set P4USER=$this->p4User";
+            $command = 'p4 set P4USER=' . $this->p4User;
         } else {
-            $command = "export P4USER=$this->p4User";
+            $command = 'export P4USER=' . $this->p4User;
         }
         $result = $this->executeCommand($command);
     }
@@ -207,13 +207,13 @@ class Perforce
     protected function getP4variable($name)
     {
         if ($this->windowsFlag) {
-            $command = "p4 set";
+            $command = 'p4 set';
             $result = $this->executeCommand($command);
-            $resArray = explode("\n", $result);
+            $resArray = explode(PHP_EOL, $result);
             foreach ($resArray as $line) {
-                $fields = explode("=", $line);
+                $fields = explode('=', $line);
                 if (strcmp($name, $fields[0]) == 0) {
-                    $index = strpos($fields[1], " ");
+                    $index = strpos($fields[1], ' ');
                     if ($index === false) {
                         $value = $fields[1];
                     } else {
@@ -237,9 +237,9 @@ class Perforce
         if (isset($this->p4Password)) {
             return $this->p4Password;
         }
-        $password = $this->getP4variable("P4PASSWD");
+        $password = $this->getP4variable('P4PASSWD');
         if (strlen($password) <= 0) {
-            $password = $io->askAndHideAnswer("Enter password for Perforce user " . $this->getUser() . ": ");
+            $password = $io->askAndHideAnswer('Enter password for Perforce user ' . $this->getUser() . ': ');
         }
         $this->p4Password = $password;
 
@@ -248,12 +248,12 @@ class Perforce
 
     public function generateP4Command($command, $useClient = true)
     {
-        $p4Command = "p4 ";
-        $p4Command = $p4Command . "-u " . $this->getUser() . " ";
+        $p4Command = 'p4 ';
+        $p4Command = $p4Command . '-u ' . $this->getUser() . ' ';
         if ($useClient) {
-            $p4Command = $p4Command . "-c " . $this->getClient() . " ";
+            $p4Command = $p4Command . '-c ' . $this->getClient() . ' ';
         }
-        $p4Command = $p4Command . "-p " . $this->getPort() . " ";
+        $p4Command = $p4Command . '-p ' . $this->getPort() . ' ';
         $p4Command = $p4Command . $command;
 
         return $p4Command;
@@ -261,7 +261,7 @@ class Perforce
 
     public function isLoggedIn()
     {
-        $command = $this->generateP4Command("login -s", false);
+        $command = $this->generateP4Command('login -s', false);
         $result = trim($this->executeCommand($command));
         $index = strpos($result, $this->getUser());
         if ($index === false) {
@@ -272,7 +272,7 @@ class Perforce
 
     public function connectClient()
     {
-        $p4CreateClientCommand = $this->generateP4Command("client -i < " . $this->getP4ClientSpec());
+        $p4CreateClientCommand = $this->generateP4Command('client -i < ' . $this->getP4ClientSpec());
         $this->executeCommand($p4CreateClientCommand);
     }
 
@@ -281,12 +281,12 @@ class Perforce
         $prevDir = getcwd();
         chdir($this->path);
 
-        $this->executeCommand("pwd");
+        $this->executeCommand('pwd');
 
-        $p4SyncCommand = $this->generateP4Command("sync -f ");
+        $p4SyncCommand = $this->generateP4Command('sync -f ');
         if (isset($label)) {
-            if (strcmp($label, "dev-master") != 0) {
-                $p4SyncCommand = $p4SyncCommand . "@" . $label;
+            if (strcmp($label, 'dev-master') != 0) {
+                $p4SyncCommand = $p4SyncCommand . '@' . $label;
             }
         }
         $this->executeCommand($p4SyncCommand);
@@ -296,27 +296,27 @@ class Perforce
 
     public function writeClientSpecToFile($spec)
     {
-        fwrite($spec, "Client: " . $this->getClient() . "\n\n");
-        fwrite($spec, "Update: " . date("Y/m/d H:i:s") . "\n\n");
-        fwrite($spec, "Access: " . date("Y/m/d H:i:s") . "\n");
-        fwrite($spec, "Owner:  " . $this->getUser() . "\n\n");
-        fwrite($spec, "Description:\n");
-        fwrite($spec, "  Created by " . $this->getUser() . " from composer.\n\n");
-        fwrite($spec, "Root: " . $this->getPath() . "\n\n");
-        fwrite($spec, "Options:  noallwrite noclobber nocompress unlocked modtime rmdir\n\n");
-        fwrite($spec, "SubmitOptions:  revertunchanged\n\n");
-        fwrite($spec, "LineEnd:  local\n\n");
+        fwrite($spec, 'Client: ' . $this->getClient() . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'Update: ' . date('Y/m/d H:i:s') . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'Access: ' . date('Y/m/d H:i:s') . PHP_EOL );
+        fwrite($spec, 'Owner:  ' . $this->getUser() . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'Description:' . PHP_EOL);
+        fwrite($spec, '  Created by ' . $this->getUser() . ' from composer.' . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'Root: ' . $this->getPath() . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'Options:  noallwrite noclobber nocompress unlocked modtime rmdir' . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'SubmitOptions:  revertunchanged' . PHP_EOL . PHP_EOL);
+        fwrite($spec, 'LineEnd:  local' . PHP_EOL . PHP_EOL);
         if ($this->isStream()) {
-            fwrite($spec, "Stream:\n");
-            fwrite($spec, "  " . $this->getStreamWithoutLabel($this->p4Stream) . "\n");
+            fwrite($spec, 'Stream:' . PHP_EOL);
+            fwrite($spec, '  ' . $this->getStreamWithoutLabel($this->p4Stream) . PHP_EOL);
         } else {
             fwrite(
                 $spec,
-                "View:  " . $this->getStream() . "/...  //" . $this->getClient() . "/" . str_replace(
-                    "//",
-                    "",
+                'View:  ' . $this->getStream() . '/...  //' . $this->getClient() . '/' . str_replace(
+                    '//',
+                    '',
                     $this->getStream()
-                ) . "/... \n"
+                ) . '/... ' . PHP_EOL
             );
         }
     }
@@ -351,11 +351,11 @@ class Perforce
     public function windowsLogin($password)
     {
         $descriptorspec = array(
-            0 => array("pipe", "r"),
-            1 => array("pipe", "w"),
-            2 => array("pipe", "a")
+            0 => array('pipe', 'r'),
+            1 => array('pipe', 'w'),
+            2 => array('pipe', 'a')
         );
-        $command = $this->generateP4Command(" login -a");
+        $command = $this->generateP4Command(' login -a');
         $process = proc_open($command, $descriptorspec, $pipes);
         if (!is_resource($process)) {
             return false;
@@ -363,8 +363,8 @@ class Perforce
         fwrite($pipes[0], $password);
         fclose($pipes[0]);
 
-        $this->read($pipes[1], "Output");
-        $this->read($pipes[2], "Error");
+        $this->read($pipes[1], 'Output');
+        $this->read($pipes[2], 'Error');
 
         fclose($pipes[1]);
         fclose($pipes[2]);
@@ -383,7 +383,7 @@ class Perforce
             if ($this->windowsFlag) {
                 $this->windowsLogin($password);
             } else {
-                $command = "echo $password | " . $this->generateP4Command(" login -a", false);
+                $command = 'echo ' . $password  . ' | ' . $this->generateP4Command(' login -a', false);
                 $this->executeCommand($command);
             }
         }
@@ -391,16 +391,16 @@ class Perforce
 
     public static function checkServerExists($url, ProcessExecutor $processExecutor)
     {
-        $result = "";
-        $processExecutor->execute("p4 -p $url info -s", $result);
-        return false === strpos($result, "error");
+        $result = '';
+        $processExecutor->execute('p4 -p ' . $url . ' info -s', $result);
+        return false === strpos($result, 'error');
     }
 
     public function getComposerInformation($identifier)
     {
-        $index = strpos($identifier, "@");
+        $index = strpos($identifier, '@');
         if ($index === false) {
-            $composerJson = "$identifier/composer.json";
+            $composerJson = $identifier. '/composer.json';
 
             return $this->getComposerInformationFromPath($composerJson);
         }
@@ -409,11 +409,11 @@ class Perforce
 
     public function getComposerInformationFromPath($composerJson)
     {
-        $command = $this->generateP4Command(" print $composerJson");
+        $command = $this->generateP4Command(' print ' . $composerJson);
         $result = $this->executeCommand($command);
-        $index = strpos($result, "{");
+        $index = strpos($result, '{');
         if ($index === false) {
-            return "";
+            return '';
         }
         if ($index >= 0) {
             $rawData = substr($result, $index);
@@ -422,22 +422,22 @@ class Perforce
             return $composer_info;
         }
 
-        return "";
+        return '';
     }
 
     public function getComposerInformationFromLabel($identifier, $index)
     {
-        $composerJsonPath = substr($identifier, 0, $index) . "/composer.json" . substr($identifier, $index);
-        $command = $this->generateP4Command(" files $composerJsonPath", false);
+        $composerJsonPath = substr($identifier, 0, $index) . '/composer.json' . substr($identifier, $index);
+        $command = $this->generateP4Command(' files ' . $composerJsonPath, false);
         $result = $this->executeCommand($command);
-        $index2 = strpos($result, "no such file(s).");
+        $index2 = strpos($result, 'no such file(s).');
         if ($index2 === false) {
-            $index3 = strpos($result, "change");
+            $index3 = strpos($result, 'change');
             if (!($index3 === false)) {
                 $phrase = trim(substr($result, $index3));
-                $fields = explode(" ", $phrase);
+                $fields = explode(' ', $phrase);
                 $id = $fields[1];
-                $composerJson = substr($identifier, 0, $index) . "/composer.json@" . $id;
+                $composerJson = substr($identifier, 0, $index) . '/composer.json@' . $id;
 
                 return $this->getComposerInformationFromPath($composerJson);
             }
@@ -452,13 +452,13 @@ class Perforce
         if (!$this->isStream()) {
             $possibleBranches[$this->p4Branch] = $this->getStream();
         } else {
-            $command = $this->generateP4Command("streams //$this->p4Depot/...");
+            $command = $this->generateP4Command('streams //' . $this->p4Depot . '/...');
             $result = $this->executeCommand($command);
-            $resArray = explode("\n", $result);
+            $resArray = explode(PHP_EOL, $result);
             foreach ($resArray as $line) {
-                $resBits = explode(" ", $line);
+                $resBits = explode(' ', $line);
                 if (count($resBits) > 4) {
-                    $branch = preg_replace("/[^A-Za-z0-9 ]/", '', $resBits[4]);
+                    $branch = preg_replace('/[^A-Za-z0-9 ]/', '', $resBits[4]);
                     $possibleBranches[$branch] = $resBits[1];
                 }
             }
@@ -471,15 +471,15 @@ class Perforce
 
     public function getTags()
     {
-        $command = $this->generateP4Command("labels");
+        $command = $this->generateP4Command('labels');
         $result = $this->executeCommand($command);
-        $resArray = explode("\n", $result);
+        $resArray = explode(PHP_EOL, $result);
         $tags = array();
         foreach ($resArray as $line) {
-            $index = strpos($line, "Label");
+            $index = strpos($line, 'Label');
             if (!($index === false)) {
-                $fields = explode(" ", $line);
-                $tags[$fields[1]] = $this->getStream() . "@" . $fields[1];
+                $fields = explode(' ', $line);
+                $tags[$fields[1]] = $this->getStream() . '@' . $fields[1];
             }
         }
 
@@ -488,13 +488,13 @@ class Perforce
 
     public function checkStream()
     {
-        $command = $this->generateP4Command("depots", false);
+        $command = $this->generateP4Command('depots', false);
         $result = $this->executeCommand($command);
-        $resArray = explode("\n", $result);
+        $resArray = explode(PHP_EOL, $result);
         foreach ($resArray as $line) {
-            $index = strpos($line, "Depot");
+            $index = strpos($line, 'Depot');
             if (!($index === false)) {
-                $fields = explode(" ", $line);
+                $fields = explode(' ', $line);
                 if (strcmp($this->p4Depot, $fields[1]) === 0) {
                     $this->p4DepotType = $fields[3];
 
@@ -508,17 +508,17 @@ class Perforce
 
     protected function getChangeList($reference)
     {
-        $index = strpos($reference, "@");
+        $index = strpos($reference, '@');
         if ($index === false) {
             return;
         }
         $label = substr($reference, $index);
-        $command = $this->generateP4Command(" changes -m1 $label");
+        $command = $this->generateP4Command(' changes -m1 ' . $label);
         $changes = $this->executeCommand($command);
-        if (strpos($changes, "Change") !== 0) {
+        if (strpos($changes, 'Change') !== 0) {
             return;
         }
-        $fields = explode(" ", $changes);
+        $fields = explode(' ', $changes);
         $changeList = $fields[1];
         return $changeList;
     }
@@ -533,9 +533,9 @@ class Perforce
         if ($toChangeList == null) {
             return;
         }
-        $index = strpos($fromReference, "@");
-        $main = substr($fromReference, 0, $index) . "/...";
-        $command = $this->generateP4Command("filelog $main@$fromChangeList,$toChangeList");
+        $index = strpos($fromReference, '@');
+        $main = substr($fromReference, 0, $index) . '/...';
+        $command = $this->generateP4Command('filelog ' . $main . '@' . $fromChangeList. ',' . $toChangeList);
         $result = $this->executeCommand($command);
         return $result;
     }
diff --git a/tests/Composer/Test/Downloader/PerforceDownloaderTest.php b/tests/Composer/Test/Downloader/PerforceDownloaderTest.php
index 46eec7284..b247cfbf3 100644
--- a/tests/Composer/Test/Downloader/PerforceDownloaderTest.php
+++ b/tests/Composer/Test/Downloader/PerforceDownloaderTest.php
@@ -54,10 +54,10 @@ class PerforceDownloaderTest extends \PHPUnit_Framework_TestCase
         );
         $package->expects($this->at(0))
         ->method('getSourceReference')
-        ->will($this->returnValue("SOURCE_REF"));
+        ->will($this->returnValue('SOURCE_REF'));
         $package->expects($this->at(1))
         ->method('getPrettyVersion')
-        ->will($this->returnValue("100"));
+        ->will($this->returnValue('100'));
         $package->expects($this->at(2))
         ->method('getRepository')
         ->will($this->returnValue($repository));
@@ -70,17 +70,17 @@ class PerforceDownloaderTest extends \PHPUnit_Framework_TestCase
     public function testDoDownload()
     {
         $downloader = new PerforceDownloader($this->io, $this->config);
-        $repoConfig = array("depot" => "TEST_DEPOT", "branch" => "TEST_BRANCH", "p4user" => "TEST_USER");
-        $port = "TEST_PORT";
-        $path = "TEST_PATH";
+        $repoConfig = array('depot' => 'TEST_DEPOT', 'branch' => 'TEST_BRANCH', 'p4user' => 'TEST_USER');
+        $port = 'TEST_PORT';
+        $path = 'TEST_PATH';
         $process = $this->getmock('Composer\Util\ProcessExecutor');
         $perforce = $this->getMock(
             'Composer\Util\Perforce',
             array('setStream', 'queryP4User', 'writeP4ClientSpec', 'connectClient', 'syncCodeBase'),
-            array($repoConfig, $port, $path, $process, true, "TEST")
+            array($repoConfig, $port, $path, $process, true, 'TEST')
         );
-        $ref = "SOURCE_REF";
-        $label = "LABEL";
+        $ref = 'SOURCE_REF';
+        $label = 'LABEL';
         $perforce->expects($this->at(0))
         ->method('setStream')
         ->with($this->equalTo($ref));
diff --git a/tests/Composer/Test/Repository/Vcs/PerforceDriverTest.php b/tests/Composer/Test/Repository/Vcs/PerforceDriverTest.php
index 706320bff..5b0bc43f9 100644
--- a/tests/Composer/Test/Repository/Vcs/PerforceDriverTest.php
+++ b/tests/Composer/Test/Repository/Vcs/PerforceDriverTest.php
@@ -67,14 +67,14 @@ class PerforceDriverTest extends \PHPUnit_Framework_TestCase
             'path' => $this->testPath,
             $process,
             true,
-            "TEST"
+            'TEST'
         );
         $perforce = $this->getMock('Composer\Util\Perforce', null, $arguments);
         $driver->injectPerforce($perforce);
         $driver->initialize();
-        $this->assertEquals("TEST_PERFORCE_URL", $driver->getUrl());
-        $this->assertEquals("TEST_DEPOT_CONFIG", $driver->getDepot());
-        $this->assertEquals("TEST_BRANCH_CONFIG", $driver->getBranch());
+        $this->assertEquals('TEST_PERFORCE_URL', $driver->getUrl());
+        $this->assertEquals('TEST_DEPOT_CONFIG', $driver->getDepot());
+        $this->assertEquals('TEST_BRANCH_CONFIG', $driver->getBranch());
     }
 
     public function testInitializeLogsInAndConnectsClient()
@@ -92,7 +92,7 @@ class PerforceDriverTest extends \PHPUnit_Framework_TestCase
         ->with($this->io);
         $perforce->expects($this->at(1))
         ->method('checkStream')
-        ->with($this->equalTo("TEST_DEPOT_CONFIG"));
+        ->with($this->equalTo('TEST_DEPOT_CONFIG'));
         $perforce->expects($this->at(2))
         ->method('writeP4ClientSpec');
         $perforce->expects($this->at(3))
@@ -118,16 +118,16 @@ class PerforceDriverTest extends \PHPUnit_Framework_TestCase
             'path' => $this->testPath,
             $process,
             true,
-            "TEST"
+            'TEST'
         );
         $perforce = $this->getMock('Composer\Util\Perforce', array('getComposerInformation'), $arguments);
         $perforce->expects($this->at(0))
         ->method('getComposerInformation')
-        ->with($this->equalTo("//TEST_DEPOT_CONFIG/TEST_IDENTIFIER"))
-        ->will($this->returnValue("Some json stuff"));
+        ->with($this->equalTo('//TEST_DEPOT_CONFIG/TEST_IDENTIFIER'))
+        ->will($this->returnValue('Some json stuff'));
         $driver->injectPerforce($perforce);
         $driver->initialize();
-        $identifier = "TEST_IDENTIFIER";
+        $identifier = 'TEST_IDENTIFIER';
         $result = $driver->hasComposerFile($identifier);
         $this->assertTrue($result);
     }
diff --git a/tests/Composer/Test/Util/PerforceTest.php b/tests/Composer/Test/Util/PerforceTest.php
index 912523a31..73b06bc6e 100644
--- a/tests/Composer/Test/Util/PerforceTest.php
+++ b/tests/Composer/Test/Util/PerforceTest.php
@@ -28,12 +28,12 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     {
         $this->processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
         $repoConfig = array(
-            "depot"                       => "depot",
-            "branch"                      => "branch",
-            "p4user"                      => "user",
-            "unique_perforce_client_name" => "TEST"
+            'depot'                       => 'depot',
+            'branch'                      => 'branch',
+            'p4user'                      => 'user',
+            'unique_perforce_client_name' => 'TEST'
         );
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, true);
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, true);
     }
 
     public function testGetClientWithoutStream()
@@ -42,7 +42,7 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
         $hostname = gethostname();
         $timestamp = time();
 
-        $expected = "composer_perforce_TEST_depot";
+        $expected = 'composer_perforce_TEST_depot';
         $this->assertEquals($expected, $client);
     }
 
@@ -52,7 +52,7 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
 
         $client = $this->perforce->getClient();
 
-        $expected = "composer_perforce_TEST_depot_branch";
+        $expected = 'composer_perforce_TEST_depot_branch';
         $this->assertEquals($expected, $client);
     }
 
@@ -67,34 +67,34 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
         $this->setPerforceToStream();
 
         $stream = $this->perforce->getStream();
-        $this->assertEquals("//depot/branch", $stream);
+        $this->assertEquals('//depot/branch', $stream);
     }
 
 
     public function testGetStreamWithoutLabelWithStreamWithoutLabel()
     {
-        $stream = $this->perforce->getStreamWithoutLabel("//depot/branch");
-        $this->assertEquals("//depot/branch", $stream);
+        $stream = $this->perforce->getStreamWithoutLabel('//depot/branch');
+        $this->assertEquals('//depot/branch', $stream);
     }
 
     public function testGetStreamWithoutLabelWithStreamWithLabel()
     {
-        $stream = $this->perforce->getStreamWithoutLabel("//depot/branching@label");
-        $this->assertEquals("//depot/branching", $stream);
+        $stream = $this->perforce->getStreamWithoutLabel('//depot/branching@label');
+        $this->assertEquals('//depot/branching', $stream);
     }
 
     public function testGetClientSpec()
     {
         $clientSpec = $this->perforce->getP4ClientSpec();
-        $expected = "path/composer_perforce_TEST_depot.p4.spec";
+        $expected = 'path/composer_perforce_TEST_depot.p4.spec';
         $this->assertEquals($expected, $clientSpec);
     }
 
     public function testGenerateP4Command()
     {
-        $command = "do something";
+        $command = 'do something';
         $p4Command = $this->perforce->generateP4Command($command);
-        $expected = "p4 -u user -c composer_perforce_TEST_depot -p port do something";
+        $expected = 'p4 -u user -c composer_perforce_TEST_depot -p port do something';
         $this->assertEquals($expected, $p4Command);
     }
 
@@ -102,40 +102,40 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     {
         $io = $this->getMock('Composer\IO\IOInterface');
 
-        $repoConfig = array("depot" => "depot", "branch" => "branch", "p4user" => "TEST_USER");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, true, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch', 'p4user' => 'TEST_USER');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, true, 'TEST');
 
         $this->perforce->queryP4user($io);
-        $this->assertEquals("TEST_USER", $this->perforce->getUser());
+        $this->assertEquals('TEST_USER', $this->perforce->getUser());
     }
 
     public function testQueryP4UserWithUserSetInP4VariablesWithWindowsOS()
     {
-        $repoConfig = array("depot" => "depot", "branch" => "branch");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, true, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, true, 'TEST');
 
         $io = $this->getMock('Composer\IO\IOInterface');
-        $expectedCommand = "p4 set";
+        $expectedCommand = 'p4 set';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "P4USER=TEST_P4VARIABLE_USER\n";
+                    $output = 'P4USER=TEST_P4VARIABLE_USER' . PHP_EOL ;
                     return true;
                 }
             )
         );
 
         $this->perforce->queryP4user($io);
-        $this->assertEquals("TEST_P4VARIABLE_USER", $this->perforce->getUser());
+        $this->assertEquals('TEST_P4VARIABLE_USER', $this->perforce->getUser());
     }
 
     public function testQueryP4UserWithUserSetInP4VariablesNotWindowsOS()
     {
-        $repoConfig = array("depot" => "depot", "branch" => "branch");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, false, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, false, 'TEST');
 
         $io = $this->getMock('Composer\IO\IOInterface');
         $expectedCommand = 'echo $P4USER';
@@ -145,43 +145,43 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "TEST_P4VARIABLE_USER\n";
+                    $output = 'TEST_P4VARIABLE_USER' . PHP_EOL;
                     return true;
                 }
             )
         );
 
         $this->perforce->queryP4user($io);
-        $this->assertEquals("TEST_P4VARIABLE_USER", $this->perforce->getUser());
+        $this->assertEquals('TEST_P4VARIABLE_USER', $this->perforce->getUser());
     }
 
     public function testQueryP4UserQueriesForUser()
     {
-        $repoConfig = array("depot" => "depot", "branch" => "branch");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, false, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, false, 'TEST');
         $io = $this->getMock('Composer\IO\IOInterface');
-        $expectedQuestion = "Enter P4 User:";
+        $expectedQuestion = 'Enter P4 User:';
         $io->expects($this->at(0))
         ->method('ask')
         ->with($this->equalTo($expectedQuestion))
-        ->will($this->returnValue("TEST_QUERY_USER"));
+        ->will($this->returnValue('TEST_QUERY_USER'));
 
         $this->perforce->queryP4user($io);
-        $this->assertEquals("TEST_QUERY_USER", $this->perforce->getUser());
+        $this->assertEquals('TEST_QUERY_USER', $this->perforce->getUser());
     }
 
     public function testQueryP4UserStoresResponseToQueryForUserWithWindows()
     {
-        $repoConfig = array("depot" => "depot", "branch" => "branch");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, true, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, true, 'TEST');
 
         $io = $this->getMock('Composer\IO\IOInterface');
-        $expectedQuestion = "Enter P4 User:";
+        $expectedQuestion = 'Enter P4 User:';
         $io->expects($this->at(0))
         ->method('ask')
         ->with($this->equalTo($expectedQuestion))
-        ->will($this->returnValue("TEST_QUERY_USER"));
-        $expectedCommand = "p4 set P4USER=TEST_QUERY_USER";
+        ->will($this->returnValue('TEST_QUERY_USER'));
+        $expectedCommand = 'p4 set P4USER=TEST_QUERY_USER';
         $this->processExecutor->expects($this->at(1))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
@@ -192,16 +192,16 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
 
     public function testQueryP4UserStoresResponseToQueryForUserWithoutWindows()
     {
-        $repoConfig = array("depot" => "depot", "branch" => "branch");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, false, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, false, 'TEST');
 
         $io = $this->getMock('Composer\IO\IOInterface');
-        $expectedQuestion = "Enter P4 User:";
+        $expectedQuestion = 'Enter P4 User:';
         $io->expects($this->at(0))
         ->method('ask')
         ->with($this->equalTo($expectedQuestion))
-        ->will($this->returnValue("TEST_QUERY_USER"));
-        $expectedCommand = "export P4USER=TEST_QUERY_USER";
+        ->will($this->returnValue('TEST_QUERY_USER'));
+        $expectedCommand = 'export P4USER=TEST_QUERY_USER';
         $this->processExecutor->expects($this->at(1))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
@@ -213,43 +213,43 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     public function testQueryP4PasswordWithPasswordAlreadySet()
     {
         $repoConfig = array(
-            "depot"      => "depot",
-            "branch"     => "branch",
-            "p4user"     => "user",
-            "p4password" => "TEST_PASSWORD"
+            'depot'      => 'depot',
+            'branch'     => 'branch',
+            'p4user'     => 'user',
+            'p4password' => 'TEST_PASSWORD'
         );
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, false, "TEST");
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, false, 'TEST');
         $io = $this->getMock('Composer\IO\IOInterface');
 
         $password = $this->perforce->queryP4Password($io);
-        $this->assertEquals("TEST_PASSWORD", $password);
+        $this->assertEquals('TEST_PASSWORD', $password);
     }
 
     public function testQueryP4PasswordWithPasswordSetInP4VariablesWithWindowsOS()
     {
         $io = $this->getMock('Composer\IO\IOInterface');
 
-        $expectedCommand = "p4 set";
+        $expectedCommand = 'p4 set';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "P4PASSWD=TEST_P4VARIABLE_PASSWORD\n";
+                    $output = 'P4PASSWD=TEST_P4VARIABLE_PASSWORD' . PHP_EOL;
                     return true;
                 }
             )
         );
 
         $password = $this->perforce->queryP4Password($io);
-        $this->assertEquals("TEST_P4VARIABLE_PASSWORD", $password);
+        $this->assertEquals('TEST_P4VARIABLE_PASSWORD', $password);
     }
 
     public function testQueryP4PasswordWithPasswordSetInP4VariablesNotWindowsOS()
     {
-        $repoConfig = array("depot" => "depot", "branch" => "branch", "p4user" => "user");
-        $this->perforce = new Perforce($repoConfig, "port", "path", $this->processExecutor, false, "TEST");
+        $repoConfig = array('depot' => 'depot', 'branch' => 'branch', 'p4user' => 'user');
+        $this->perforce = new Perforce($repoConfig, 'port', 'path', $this->processExecutor, false, 'TEST');
 
         $io = $this->getMock('Composer\IO\IOInterface');
         $expectedCommand = 'echo $P4PASSWD';
@@ -259,35 +259,36 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "TEST_P4VARIABLE_PASSWORD\n";
+                    $output = 'TEST_P4VARIABLE_PASSWORD' . PHP_EOL;
                     return true;
                 }
             )
         );
 
         $password = $this->perforce->queryP4Password($io);
-        $this->assertEquals("TEST_P4VARIABLE_PASSWORD", $password);
+        $this->assertEquals('TEST_P4VARIABLE_PASSWORD', $password);
     }
 
     public function testQueryP4PasswordQueriesForPassword()
     {
         $io = $this->getMock('Composer\IO\IOInterface');
-        $expectedQuestion = "Enter password for Perforce user user: ";
+        $expectedQuestion = 'Enter password for Perforce user user: ';
         $io->expects($this->at(0))
         ->method('askAndHideAnswer')
         ->with($this->equalTo($expectedQuestion))
-        ->will($this->returnValue("TEST_QUERY_PASSWORD"));
+        ->will($this->returnValue('TEST_QUERY_PASSWORD'));
 
         $password = $this->perforce->queryP4Password($io);
-        $this->assertEquals("TEST_QUERY_PASSWORD", $password);
+        $this->assertEquals('TEST_QUERY_PASSWORD', $password);
     }
 
     public function testWriteP4ClientSpecWithoutStream()
     {
-        $stream = fopen("php://memory", 'w+');
+        $stream = fopen('php://memory', 'w+');
         $this->perforce->writeClientSpecToFile($stream);
 
         rewind($stream);
+
         $expectedArray = $this->getExpectedClientSpec(false);
         try {
             foreach ($expectedArray as $expected) {
@@ -304,7 +305,7 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     public function testWriteP4ClientSpecWithStream()
     {
         $this->setPerforceToStream();
-        $stream = fopen("php://memory", 'w+');
+        $stream = fopen('php://memory', 'w+');
 
         $this->perforce->writeClientSpecToFile($stream);
         rewind($stream);
@@ -324,7 +325,7 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
 
     public function testIsLoggedIn()
     {
-        $expectedCommand = "p4 -u user -p port login -s";
+        $expectedCommand = 'p4 -u user -p port login -s';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand), $this->equalTo(null))
@@ -335,7 +336,7 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
 
     public function testConnectClient()
     {
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot -p port client -i < path/composer_perforce_TEST_depot.p4.spec";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot -p port client -i < path/composer_perforce_TEST_depot.p4.spec';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand), $this->equalTo(null))
@@ -348,74 +349,74 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     {
         $this->setPerforceToStream();
 
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot_branch -p port streams //depot/...";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot_branch -p port streams //depot/...';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "Stream //depot/branch mainline none 'branch'\n";
+                    $output = 'Stream //depot/branch mainline none \'branch\'' . PHP_EOL;
                     return true;
                 }
             )
         );
 
         $branches = $this->perforce->getBranches();
-        $this->assertEquals("//depot/branch", $branches['master']);
+        $this->assertEquals('//depot/branch', $branches['master']);
     }
 
     public function testGetBranchesWithoutStream()
     {
         $branches = $this->perforce->getBranches();
-        $this->assertEquals("//depot", $branches['master']);
+        $this->assertEquals('//depot', $branches['master']);
     }
 
     public function testGetTagsWithoutStream()
     {
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot -p port labels";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot -p port labels';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "Label 0.0.1 2013/07/31 'First Label!'\nLabel 0.0.2 2013/08/01 'Second Label!'\n";
+                    $output = 'Label 0.0.1 2013/07/31 \'First Label!\'' . PHP_EOL . 'Label 0.0.2 2013/08/01 \'Second Label!\'' . PHP_EOL;
                     return true;
                 }
             )
         );
 
         $tags = $this->perforce->getTags();
-        $this->assertEquals("//depot@0.0.1", $tags['0.0.1']);
-        $this->assertEquals("//depot@0.0.2", $tags['0.0.2']);
+        $this->assertEquals('//depot@0.0.1', $tags['0.0.1']);
+        $this->assertEquals('//depot@0.0.2', $tags['0.0.2']);
     }
 
     public function testGetTagsWithStream()
     {
         $this->setPerforceToStream();
 
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot_branch -p port labels";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot_branch -p port labels';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "Label 0.0.1 2013/07/31 'First Label!'\nLabel 0.0.2 2013/08/01 'Second Label!'\n";
+                    $output = 'Label 0.0.1 2013/07/31 \'First Label!\'' . PHP_EOL . 'Label 0.0.2 2013/08/01 \'Second Label!\'' . PHP_EOL;
                     return true;
                 }
             )
         );
 
         $tags = $this->perforce->getTags();
-        $this->assertEquals("//depot/branch@0.0.1", $tags['0.0.1']);
-        $this->assertEquals("//depot/branch@0.0.2", $tags['0.0.2']);
+        $this->assertEquals('//depot/branch@0.0.1', $tags['0.0.1']);
+        $this->assertEquals('//depot/branch@0.0.2', $tags['0.0.2']);
     }
 
     public function testCheckStreamWithoutStream()
     {
-        $result = $this->perforce->checkStream("depot");
+        $result = $this->perforce->checkStream('depot');
         $this->assertFalse($result);
         $this->assertFalse($this->perforce->isStream());
     }
@@ -426,19 +427,19 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "Depot depot 2013/06/25 stream /p4/1/depots/depot/... 'Created by Me'";
+                    $output = 'Depot depot 2013/06/25 stream /p4/1/depots/depot/... \'Created by Me\'';
                     return true;
                 }
             )
         );
-        $result = $this->perforce->checkStream("depot");
+        $result = $this->perforce->checkStream('depot');
         $this->assertTrue($result);
         $this->assertTrue($this->perforce->isStream());
     }
 
     public function testGetComposerInformationWithoutLabelWithoutStream()
     {
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot -p port  print //depot/composer.json";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot -p port  print //depot/composer.json';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
@@ -451,32 +452,32 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
             )
         );
 
-        $result = $this->perforce->getComposerInformation("//depot");
+        $result = $this->perforce->getComposerInformation('//depot');
         $expected = array(
-            "name"              => "test/perforce",
-            "description"       => "Basic project for testing",
-            "minimum-stability" => "dev",
-            "autoload"          => array("psr-0" => array())
+            'name'              => 'test/perforce',
+            'description'       => 'Basic project for testing',
+            'minimum-stability' => 'dev',
+            'autoload'          => array('psr-0' => array())
         );
         $this->assertEquals($expected, $result);
     }
 
     public function testGetComposerInformationWithLabelWithoutStream()
     {
-        $expectedCommand = "p4 -u user -p port  files //depot/composer.json@0.0.1";
+        $expectedCommand = 'p4 -u user -p port  files //depot/composer.json@0.0.1';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "//depot/composer.json#1 - branch change 10001 (text)";
+                    $output = '//depot/composer.json#1 - branch change 10001 (text)';
                     return true;
                 }
             )
         );
 
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot -p port  print //depot/composer.json@10001";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot -p port  print //depot/composer.json@10001';
         $this->processExecutor->expects($this->at(1))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
@@ -489,13 +490,13 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
             )
         );
 
-        $result = $this->perforce->getComposerInformation("//depot@0.0.1");
+        $result = $this->perforce->getComposerInformation('//depot@0.0.1');
 
         $expected = array(
-            "name"              => "test/perforce",
-            "description"       => "Basic project for testing",
-            "minimum-stability" => "dev",
-            "autoload"          => array("psr-0" => array())
+            'name'              => 'test/perforce',
+            'description'       => 'Basic project for testing',
+            'minimum-stability' => 'dev',
+            'autoload'          => array('psr-0' => array())
         );
         $this->assertEquals($expected, $result);
     }
@@ -504,7 +505,7 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     {
         $this->setPerforceToStream();
 
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot_branch -p port  print //depot/branch/composer.json";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot_branch -p port  print //depot/branch/composer.json';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
@@ -517,13 +518,13 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
             )
         );
 
-        $result = $this->perforce->getComposerInformation("//depot/branch");
+        $result = $this->perforce->getComposerInformation('//depot/branch');
 
         $expected = array(
-            "name"              => "test/perforce",
-            "description"       => "Basic project for testing",
-            "minimum-stability" => "dev",
-            "autoload"          => array("psr-0" => array())
+            'name'              => 'test/perforce',
+            'description'       => 'Basic project for testing',
+            'minimum-stability' => 'dev',
+            'autoload'          => array('psr-0' => array())
         );
         $this->assertEquals($expected, $result);
     }
@@ -531,20 +532,20 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     public function testGetComposerInformationWithLabelWithStream()
     {
         $this->setPerforceToStream();
-        $expectedCommand = "p4 -u user -p port  files //depot/branch/composer.json@0.0.1";
+        $expectedCommand = 'p4 -u user -p port  files //depot/branch/composer.json@0.0.1';
         $this->processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will(
             $this->returnCallback(
                 function ($command, &$output) {
-                    $output = "//depot/composer.json#1 - branch change 10001 (text)";
+                    $output = '//depot/composer.json#1 - branch change 10001 (text)';
                     return true;
                 }
             )
         );
 
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot_branch -p port  print //depot/branch/composer.json@10001";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot_branch -p port  print //depot/branch/composer.json@10001';
         $this->processExecutor->expects($this->at(1))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
@@ -557,51 +558,51 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
             )
         );
 
-        $result = $this->perforce->getComposerInformation("//depot/branch@0.0.1");
+        $result = $this->perforce->getComposerInformation('//depot/branch@0.0.1');
 
         $expected = array(
-            "name"              => "test/perforce",
-            "description"       => "Basic project for testing",
-            "minimum-stability" => "dev",
-            "autoload"          => array("psr-0" => array())
+            'name'              => 'test/perforce',
+            'description'       => 'Basic project for testing',
+            'minimum-stability' => 'dev',
+            'autoload'          => array('psr-0' => array())
         );
         $this->assertEquals($expected, $result);
     }
 
     public function testSyncCodeBaseWithoutStream()
     {
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot -p port sync -f @label";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot -p port sync -f @label';
         $this->processExecutor->expects($this->at(1))
         ->method('execute')
         ->with($this->equalTo($expectedCommand), $this->equalTo(null))
         ->will($this->returnValue(0));
 
-        $this->perforce->syncCodeBase("label");
+        $this->perforce->syncCodeBase('label');
     }
 
     public function testSyncCodeBaseWithStream()
     {
         $this->setPerforceToStream();
-        $expectedCommand = "p4 -u user -c composer_perforce_TEST_depot_branch -p port sync -f @label";
+        $expectedCommand = 'p4 -u user -c composer_perforce_TEST_depot_branch -p port sync -f @label';
         $this->processExecutor->expects($this->at(1))
         ->method('execute')
         ->with($this->equalTo($expectedCommand))
         ->will($this->returnValue(0));
 
-        $this->perforce->syncCodeBase("label");
+        $this->perforce->syncCodeBase('label');
     }
 
     public function testCheckServerExists()
     {
         $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
 
-        $expectedCommand = "p4 -p perforce.does.exist:port info -s";
+        $expectedCommand = 'p4 -p perforce.does.exist:port info -s';
         $processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand), $this->equalTo(null))
         ->will($this->returnValue(0));
 
-        $result = $this->perforce->checkServerExists("perforce.does.exist:port", $processExecutor);
+        $result = $this->perforce->checkServerExists('perforce.does.exist:port', $processExecutor);
         $this->assertTrue($result);
     }
 
@@ -609,13 +610,13 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     {
         $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
 
-        $expectedCommand = "p4 -p perforce.does.not.exist:port info -s";
+        $expectedCommand = 'p4 -p perforce.does.not.exist:port info -s';
         $processExecutor->expects($this->at(0))
         ->method('execute')
         ->with($this->equalTo($expectedCommand), $this->equalTo(null))
-        ->will($this->returnValue("Perforce client error:"));
+        ->will($this->returnValue('Perforce client error:'));
 
-        $result = $this->perforce->checkServerExists("perforce.does.not.exist:port", $processExecutor);
+        $result = $this->perforce->checkServerExists('perforce.does.not.exist:port', $processExecutor);
         $this->assertTrue($result);
     }
 
@@ -639,30 +640,30 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
     private function getExpectedClientSpec($withStream)
     {
         $expectedArray = array(
-            "Client: composer_perforce_TEST_depot",
-            "\n",
-            "Update:",
-            "\n",
-            "Access:",
-            "Owner:  user",
-            "\n",
-            "Description:",
-            "  Created by user from composer.",
-            "\n",
-            "Root: path",
-            "\n",
-            "Options:  noallwrite noclobber nocompress unlocked modtime rmdir",
-            "\n",
-            "SubmitOptions:  revertunchanged",
-            "\n",
-            "LineEnd:  local",
-            "\n"
+            'Client: composer_perforce_TEST_depot',
+            PHP_EOL,
+            'Update:',
+            PHP_EOL,
+            'Access:',
+            'Owner:  user',
+            PHP_EOL,
+            'Description:',
+            '  Created by user from composer.',
+            PHP_EOL,
+            'Root: path',
+            PHP_EOL,
+            'Options:  noallwrite noclobber nocompress unlocked modtime rmdir',
+            PHP_EOL,
+            'SubmitOptions:  revertunchanged',
+            PHP_EOL,
+            'LineEnd:  local',
+            PHP_EOL
         );
         if ($withStream) {
-            $expectedArray[] = "Stream:";
-            $expectedArray[] = "  //depot/branch";
+            $expectedArray[] = 'Stream:';
+            $expectedArray[] = '  //depot/branch';
         } else {
-            $expectedArray[] = "View:  //depot/...  //composer_perforce_TEST_depot/depot/...";
+            $expectedArray[] = 'View:  //depot/...  //composer_perforce_TEST_depot/depot/...';
         }
 
         return $expectedArray;
@@ -670,6 +671,6 @@ class PerforceTest extends \PHPUnit_Framework_TestCase
 
     private function setPerforceToStream()
     {
-        $this->perforce->setStream("//depot/branch");
+        $this->perforce->setStream('//depot/branch');
     }
 }