diff --git a/src/Composer/Downloader/FossilDownloader.php b/src/Composer/Downloader/FossilDownloader.php
index a597d51d5..74364dde4 100644
--- a/src/Composer/Downloader/FossilDownloader.php
+++ b/src/Composer/Downloader/FossilDownloader.php
@@ -39,15 +39,15 @@ class FossilDownloader extends VcsDownloader
         $ref = ProcessExecutor::escape($package->getSourceReference());
         $repoFile = $path . '.fossil';
         $this->io->writeError("Cloning ".$package->getSourceReference());
-        $command = sprintf('fossil clone %s %s', $url, ProcessExecutor::escape($repoFile));
+        $command = sprintf('fossil clone -- %s %s', $url, ProcessExecutor::escape($repoFile));
         if (0 !== $this->process->execute($command, $ignoredOutput)) {
             throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
         }
-        $command = sprintf('fossil open %s --nested', ProcessExecutor::escape($repoFile));
+        $command = sprintf('fossil open --nested -- %s', ProcessExecutor::escape($repoFile));
         if (0 !== $this->process->execute($command, $ignoredOutput, realpath($path))) {
             throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
         }
-        $command = sprintf('fossil update %s', $ref);
+        $command = sprintf('fossil update -- %s', $ref);
         if (0 !== $this->process->execute($command, $ignoredOutput, realpath($path))) {
             throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
         }
diff --git a/src/Composer/Downloader/GitDownloader.php b/src/Composer/Downloader/GitDownloader.php
index 54b67983e..92eb7355b 100644
--- a/src/Composer/Downloader/GitDownloader.php
+++ b/src/Composer/Downloader/GitDownloader.php
@@ -92,10 +92,10 @@ class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
             $command =
                 'git clone --no-checkout %cachePath% %path% --dissociate --reference %cachePath% '
                 . '&& cd '.$flag.'%path% '
-                . '&& git remote set-url origin %sanitizedUrl% && git remote add composer %sanitizedUrl%';
+                . '&& git remote set-url origin -- %sanitizedUrl% && git remote add composer -- %sanitizedUrl%';
         } else {
             $msg = "Cloning ".$this->getShortHash($ref);
-            $command = 'git clone --no-checkout %url% %path% && cd '.$flag.'%path% && git remote add composer %url% && git fetch composer && git remote set-url origin %sanitizedUrl% && git remote set-url composer %sanitizedUrl%';
+            $command = 'git clone --no-checkout -- %url% %path% && cd '.$flag.'%path% && git remote add composer -- %url% && git fetch composer && git remote set-url origin -- %sanitizedUrl% && git remote set-url composer -- %sanitizedUrl%';
             if (getenv('COMPOSER_DISABLE_NETWORK')) {
                 throw new \RuntimeException('The required git reference for '.$package->getName().' is not in cache and network is disabled, aborting');
             }
@@ -147,10 +147,10 @@ class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
 
         if (!empty($this->cachedPackages[$target->getId()][$ref])) {
             $msg = "Checking out ".$this->getShortHash($ref).' from cache';
-            $command = '(git rev-parse --quiet --verify %ref% || (git remote set-url composer %cachePath% && git fetch composer && git fetch --tags composer)) && git remote set-url composer %sanitizedUrl%';
+            $command = '(git rev-parse --quiet --verify %ref% || (git remote set-url composer -- %cachePath% && git fetch composer && git fetch --tags composer)) && git remote set-url composer -- %sanitizedUrl%';
         } else {
             $msg = "Checking out ".$this->getShortHash($ref);
-            $command = '(git remote set-url composer %url% && git rev-parse --quiet --verify %ref% || (git fetch composer && git fetch --tags composer)) && git remote set-url composer %sanitizedUrl%';
+            $command = '(git remote set-url composer -- %url% && git rev-parse --quiet --verify %ref% || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- %sanitizedUrl%';
             if (getenv('COMPOSER_DISABLE_NETWORK')) {
                 throw new \RuntimeException('The required git reference for '.$target->getName().' is not in cache and network is disabled, aborting');
             }
@@ -478,7 +478,7 @@ class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
 
     protected function updateOriginUrl($path, $url)
     {
-        $this->process->execute(sprintf('git remote set-url origin %s', ProcessExecutor::escape($url)), $output, $path);
+        $this->process->execute(sprintf('git remote set-url origin -- %s', ProcessExecutor::escape($url)), $output, $path);
         $this->setPushUrl($path, $url);
     }
 
@@ -491,7 +491,7 @@ class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
             if (!in_array('ssh', $protocols, true)) {
                 $pushUrl = 'https://' . $match[1] . '/'.$match[2].'/'.$match[3].'.git';
             }
-            $cmd = sprintf('git remote set-url --push origin %s', ProcessExecutor::escape($pushUrl));
+            $cmd = sprintf('git remote set-url --push origin -- %s', ProcessExecutor::escape($pushUrl));
             $this->process->execute($cmd, $ignoredOutput, $path);
         }
     }
diff --git a/src/Composer/Downloader/GzipDownloader.php b/src/Composer/Downloader/GzipDownloader.php
index 04dd5e7ed..e12e09168 100644
--- a/src/Composer/Downloader/GzipDownloader.php
+++ b/src/Composer/Downloader/GzipDownloader.php
@@ -30,7 +30,7 @@ class GzipDownloader extends ArchiveDownloader
 
         // Try to use gunzip on *nix
         if (!Platform::isWindows()) {
-            $command = 'gzip -cd ' . ProcessExecutor::escape($file) . ' > ' . ProcessExecutor::escape($targetFilepath);
+            $command = 'gzip -cd -- ' . ProcessExecutor::escape($file) . ' > ' . ProcessExecutor::escape($targetFilepath);
 
             if (0 === $this->process->execute($command, $ignoredOutput)) {
                 return;
diff --git a/src/Composer/Downloader/HgDownloader.php b/src/Composer/Downloader/HgDownloader.php
index 737dd8758..1792dc0d5 100644
--- a/src/Composer/Downloader/HgDownloader.php
+++ b/src/Composer/Downloader/HgDownloader.php
@@ -39,13 +39,13 @@ class HgDownloader extends VcsDownloader
         $hgUtils = new HgUtils($this->io, $this->config, $this->process);
 
         $cloneCommand = function ($url) use ($path) {
-            return sprintf('hg clone %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($path));
+            return sprintf('hg clone -- %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($path));
         };
 
         $hgUtils->runCommand($cloneCommand, $url, $path);
 
         $ref = ProcessExecutor::escape($package->getSourceReference());
-        $command = sprintf('hg up %s', $ref);
+        $command = sprintf('hg up -- %s', $ref);
         if (0 !== $this->process->execute($command, $ignoredOutput, realpath($path))) {
             throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
         }
@@ -66,7 +66,7 @@ class HgDownloader extends VcsDownloader
         }
 
         $command = function ($url) use ($ref) {
-            return sprintf('hg pull %s && hg up %s', ProcessExecutor::escape($url), ProcessExecutor::escape($ref));
+            return sprintf('hg pull -- %s && hg up -- %s', ProcessExecutor::escape($url), ProcessExecutor::escape($ref));
         };
 
         $hgUtils->runCommand($command, $url, $path);
diff --git a/src/Composer/Downloader/RarDownloader.php b/src/Composer/Downloader/RarDownloader.php
index 8951d9636..7f589220c 100644
--- a/src/Composer/Downloader/RarDownloader.php
+++ b/src/Composer/Downloader/RarDownloader.php
@@ -33,7 +33,7 @@ class RarDownloader extends ArchiveDownloader
 
         // Try to use unrar on *nix
         if (!Platform::isWindows()) {
-            $command = 'unrar x ' . ProcessExecutor::escape($file) . ' ' . ProcessExecutor::escape($path) . ' >/dev/null && chmod -R u+w ' . ProcessExecutor::escape($path);
+            $command = 'unrar x -- ' . ProcessExecutor::escape($file) . ' ' . ProcessExecutor::escape($path) . ' >/dev/null && chmod -R u+w ' . ProcessExecutor::escape($path);
 
             if (0 === $this->process->execute($command, $ignoredOutput)) {
                 return;
diff --git a/src/Composer/Downloader/SvnDownloader.php b/src/Composer/Downloader/SvnDownloader.php
index 80454f855..fe8f64162 100644
--- a/src/Composer/Downloader/SvnDownloader.php
+++ b/src/Composer/Downloader/SvnDownloader.php
@@ -184,7 +184,7 @@ class SvnDownloader extends VcsDownloader
     {
         if (preg_match('{@(\d+)$}', $fromReference) && preg_match('{@(\d+)$}', $toReference)) {
             // retrieve the svn base url from the checkout folder
-            $command = sprintf('svn info --non-interactive --xml %s', ProcessExecutor::escape($path));
+            $command = sprintf('svn info --non-interactive --xml -- %s', ProcessExecutor::escape($path));
             if (0 !== $this->process->execute($command, $output, $path)) {
                 throw new \RuntimeException(
                     'Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput()
diff --git a/src/Composer/Repository/Vcs/FossilDriver.php b/src/Composer/Repository/Vcs/FossilDriver.php
index 12218b2d7..8f73ffb5e 100644
--- a/src/Composer/Repository/Vcs/FossilDriver.php
+++ b/src/Composer/Repository/Vcs/FossilDriver.php
@@ -94,13 +94,13 @@ class FossilDriver extends VcsDriver
 
             $fs->ensureDirectoryExists($this->checkoutDir);
 
-            if (0 !== $this->process->execute(sprintf('fossil clone %s %s', ProcessExecutor::escape($this->url), ProcessExecutor::escape($this->repoFile)), $output)) {
+            if (0 !== $this->process->execute(sprintf('fossil clone -- %s %s', ProcessExecutor::escape($this->url), ProcessExecutor::escape($this->repoFile)), $output)) {
                 $output = $this->process->getErrorOutput();
 
                 throw new \RuntimeException('Failed to clone '.$this->url.' to repository ' . $this->repoFile . "\n\n" .$output);
             }
 
-            if (0 !== $this->process->execute(sprintf('fossil open %s --nested', ProcessExecutor::escape($this->repoFile)), $output, $this->checkoutDir)) {
+            if (0 !== $this->process->execute(sprintf('fossil open --nested -- %s', ProcessExecutor::escape($this->repoFile)), $output, $this->checkoutDir)) {
                 $output = $this->process->getErrorOutput();
 
                 throw new \RuntimeException('Failed to open repository '.$this->repoFile.' in ' . $this->checkoutDir . "\n\n" .$output);
@@ -149,7 +149,7 @@ class FossilDriver extends VcsDriver
      */
     public function getFileContent($file, $identifier)
     {
-        $command = sprintf('fossil cat -r %s %s', ProcessExecutor::escape($identifier), ProcessExecutor::escape($file));
+        $command = sprintf('fossil cat -r %s -- %s', ProcessExecutor::escape($identifier), ProcessExecutor::escape($file));
         $this->process->execute($command, $content, $this->checkoutDir);
 
         if (!trim($content)) {
diff --git a/src/Composer/Repository/Vcs/GitDriver.php b/src/Composer/Repository/Vcs/GitDriver.php
index 0faead2a7..ea7803631 100644
--- a/src/Composer/Repository/Vcs/GitDriver.php
+++ b/src/Composer/Repository/Vcs/GitDriver.php
@@ -230,7 +230,7 @@ class GitDriver extends VcsDriver
 
         try {
             $gitUtil->runCommand(function ($url) {
-                return 'git ls-remote --heads ' . ProcessExecutor::escape($url);
+                return 'git ls-remote --heads -- ' . ProcessExecutor::escape($url);
             }, $url, sys_get_temp_dir());
         } catch (\RuntimeException $e) {
             return false;
diff --git a/src/Composer/Repository/Vcs/HgDriver.php b/src/Composer/Repository/Vcs/HgDriver.php
index 4fa737168..f3b0e6c9e 100644
--- a/src/Composer/Repository/Vcs/HgDriver.php
+++ b/src/Composer/Repository/Vcs/HgDriver.php
@@ -67,7 +67,7 @@ class HgDriver extends VcsDriver
 
                 $repoDir = $this->repoDir;
                 $command = function ($url) use ($repoDir) {
-                    return sprintf('hg clone --noupdate %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($repoDir));
+                    return sprintf('hg clone --noupdate -- %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($repoDir));
                 };
 
                 $hgUtils->runCommand($command, $this->url, null);
@@ -228,7 +228,7 @@ class HgDriver extends VcsDriver
         }
 
         $process = new ProcessExecutor($io);
-        $exit = $process->execute(sprintf('hg identify %s', ProcessExecutor::escape($url)), $ignored);
+        $exit = $process->execute(sprintf('hg identify -- %s', ProcessExecutor::escape($url)), $ignored);
 
         return $exit === 0;
     }
diff --git a/src/Composer/Repository/Vcs/SvnDriver.php b/src/Composer/Repository/Vcs/SvnDriver.php
index 8e2c5e792..ab3f95f16 100644
--- a/src/Composer/Repository/Vcs/SvnDriver.php
+++ b/src/Composer/Repository/Vcs/SvnDriver.php
@@ -306,7 +306,7 @@ class SvnDriver extends VcsDriver
 
         $process = new ProcessExecutor($io);
         $exit = $process->execute(
-            "svn info --non-interactive ".ProcessExecutor::escape($url),
+            "svn info --non-interactive -- ".ProcessExecutor::escape($url),
             $ignoredOutput
         );
 
diff --git a/src/Composer/Util/Git.php b/src/Composer/Util/Git.php
index dd95f2062..3290c6d85 100644
--- a/src/Composer/Util/Git.php
+++ b/src/Composer/Util/Git.php
@@ -261,7 +261,7 @@ class Git
                 $commandCallable = function ($url) {
                     $sanitizedUrl = preg_replace('{://([^@]+?):(.+?)@}', '://', $url);
 
-                    return sprintf('git remote set-url origin %s && git remote update --prune origin && git remote set-url origin %s && git gc --auto', ProcessExecutor::escape($url), ProcessExecutor::escape($sanitizedUrl));
+                    return sprintf('git remote set-url origin -- %s && git remote update --prune origin && git remote set-url origin -- %s && git gc --auto', ProcessExecutor::escape($url), ProcessExecutor::escape($sanitizedUrl));
                 };
                 $this->runCommand($commandCallable, $url, $dir);
             } catch (\Exception $e) {
@@ -277,7 +277,7 @@ class Git
         $this->filesystem->removeDirectory($dir);
 
         $commandCallable = function ($url) use ($dir) {
-            return sprintf('git clone --mirror %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($dir));
+            return sprintf('git clone --mirror -- %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($dir));
         };
 
         $this->runCommand($commandCallable, $url, $dir, true);
diff --git a/src/Composer/Util/Svn.php b/src/Composer/Util/Svn.php
index 6088d0c5f..da934c161 100644
--- a/src/Composer/Util/Svn.php
+++ b/src/Composer/Util/Svn.php
@@ -224,7 +224,7 @@ class Svn
     protected function getCommand($cmd, $url, $path = null)
     {
         $cmd = sprintf(
-            '%s %s%s %s',
+            '%s %s%s -- %s',
             $cmd,
             '--non-interactive ',
             $this->getCredentialString(),
diff --git a/tests/Composer/Test/Downloader/FossilDownloaderTest.php b/tests/Composer/Test/Downloader/FossilDownloaderTest.php
index 5121d8546..57498e51b 100644
--- a/tests/Composer/Test/Downloader/FossilDownloaderTest.php
+++ b/tests/Composer/Test/Downloader/FossilDownloaderTest.php
@@ -69,19 +69,19 @@ class FossilDownloaderTest extends TestCase
             ->will($this->returnValue(array('http://fossil.kd2.org/kd2fw/')));
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
 
-        $expectedFossilCommand = $this->getCmd('fossil clone \'http://fossil.kd2.org/kd2fw/\' \'repo.fossil\'');
+        $expectedFossilCommand = $this->getCmd('fossil clone -- \'http://fossil.kd2.org/kd2fw/\' \'repo.fossil\'');
         $processExecutor->expects($this->at(0))
             ->method('execute')
             ->with($this->equalTo($expectedFossilCommand))
             ->will($this->returnValue(0));
 
-        $expectedFossilCommand = $this->getCmd('fossil open \'repo.fossil\' --nested');
+        $expectedFossilCommand = $this->getCmd('fossil open --nested -- \'repo.fossil\'');
         $processExecutor->expects($this->at(1))
             ->method('execute')
             ->with($this->equalTo($expectedFossilCommand))
             ->will($this->returnValue(0));
 
-        $expectedFossilCommand = $this->getCmd('fossil update \'trunk\'');
+        $expectedFossilCommand = $this->getCmd('fossil update -- \'trunk\'');
         $processExecutor->expects($this->at(2))
             ->method('execute')
             ->with($this->equalTo($expectedFossilCommand))
diff --git a/tests/Composer/Test/Downloader/GitDownloaderTest.php b/tests/Composer/Test/Downloader/GitDownloaderTest.php
index c16c925b6..82d55e137 100644
--- a/tests/Composer/Test/Downloader/GitDownloaderTest.php
+++ b/tests/Composer/Test/Downloader/GitDownloaderTest.php
@@ -109,7 +109,7 @@ class GitDownloaderTest extends TestCase
             ->will($this->returnValue('dev-master'));
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
 
-        $expectedGitCommand = $this->winCompat("git clone --no-checkout 'https://example.com/composer/composer' 'composerPath' && cd 'composerPath' && git remote add composer 'https://example.com/composer/composer' && git fetch composer && git remote set-url origin 'https://example.com/composer/composer' && git remote set-url composer 'https://example.com/composer/composer'");
+        $expectedGitCommand = $this->winCompat("git clone --no-checkout -- 'https://example.com/composer/composer' 'composerPath' && cd 'composerPath' && git remote add composer -- 'https://example.com/composer/composer' && git fetch composer && git remote set-url origin -- 'https://example.com/composer/composer' && git remote set-url composer -- 'https://example.com/composer/composer'");
         $processExecutor->expects($this->at(0))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
@@ -158,7 +158,7 @@ class GitDownloaderTest extends TestCase
         $filesystem = new \Composer\Util\Filesystem;
         $filesystem->removeDirectory($cachePath);
 
-        $expectedGitCommand = $this->winCompat(sprintf("git clone --mirror 'https://example.com/composer/composer' '%s'", $cachePath));
+        $expectedGitCommand = $this->winCompat(sprintf("git clone --mirror -- 'https://example.com/composer/composer' '%s'", $cachePath));
         $processExecutor->expects($this->at(0))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
@@ -180,7 +180,7 @@ class GitDownloaderTest extends TestCase
             ->with($this->equalTo($this->winCompat('git rev-parse --quiet --verify \'1234567890123456789012345678901234567890^{commit}\'')), $this->equalTo(null), $this->equalTo($this->winCompat($cachePath)))
             ->will($this->returnValue(0));
 
-        $expectedGitCommand = $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));
+        $expectedGitCommand = $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));
         $processExecutor->expects($this->at(3))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
@@ -221,7 +221,7 @@ class GitDownloaderTest extends TestCase
             ->will($this->returnValue('1.0.0'));
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
 
-        $expectedGitCommand = $this->winCompat("git clone --no-checkout 'https://github.com/mirrors/composer' 'composerPath' && cd 'composerPath' && git remote add composer 'https://github.com/mirrors/composer' && git fetch composer && git remote set-url origin 'https://github.com/mirrors/composer' && git remote set-url composer 'https://github.com/mirrors/composer'");
+        $expectedGitCommand = $this->winCompat("git clone --no-checkout -- 'https://github.com/mirrors/composer' 'composerPath' && cd 'composerPath' && git remote add composer -- 'https://github.com/mirrors/composer' && git fetch composer && git remote set-url origin -- 'https://github.com/mirrors/composer' && git remote set-url composer -- 'https://github.com/mirrors/composer'");
         $processExecutor->expects($this->at(0))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
@@ -232,19 +232,19 @@ class GitDownloaderTest extends TestCase
             ->with()
             ->will($this->returnValue('Error1'));
 
-        $expectedGitCommand = $this->winCompat("git clone --no-checkout 'git@github.com:mirrors/composer' 'composerPath' && cd 'composerPath' && git remote add composer 'git@github.com:mirrors/composer' && git fetch composer && git remote set-url origin 'git@github.com:mirrors/composer' && git remote set-url composer 'git@github.com:mirrors/composer'");
+        $expectedGitCommand = $this->winCompat("git clone --no-checkout -- 'git@github.com:mirrors/composer' 'composerPath' && cd 'composerPath' && git remote add composer -- 'git@github.com:mirrors/composer' && git fetch composer && git remote set-url origin -- 'git@github.com:mirrors/composer' && git remote set-url composer -- 'git@github.com:mirrors/composer'");
         $processExecutor->expects($this->at(2))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
             ->will($this->returnValue(0));
 
-        $expectedGitCommand = $this->winCompat("git remote set-url origin 'https://github.com/composer/composer'");
+        $expectedGitCommand = $this->winCompat("git remote set-url origin -- 'https://github.com/composer/composer'");
         $processExecutor->expects($this->at(3))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand), $this->equalTo(null), $this->equalTo($this->winCompat('composerPath')))
             ->will($this->returnValue(0));
 
-        $expectedGitCommand = $this->winCompat("git remote set-url --push origin 'git@github.com:composer/composer.git'");
+        $expectedGitCommand = $this->winCompat("git remote set-url --push origin -- 'git@github.com:composer/composer.git'");
         $processExecutor->expects($this->at(4))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand), $this->equalTo(null), $this->equalTo($this->winCompat('composerPath')))
@@ -299,13 +299,13 @@ class GitDownloaderTest extends TestCase
             ->will($this->returnValue('1.0.0'));
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
 
-        $expectedGitCommand = $this->winCompat("git clone --no-checkout '{$url}' 'composerPath' && cd 'composerPath' && git remote add composer '{$url}' && git fetch composer && git remote set-url origin '{$url}' && git remote set-url composer '{$url}'");
+        $expectedGitCommand = $this->winCompat("git clone --no-checkout -- '{$url}' 'composerPath' && cd 'composerPath' && git remote add composer -- '{$url}' && git fetch composer && git remote set-url origin -- '{$url}' && git remote set-url composer -- '{$url}'");
         $processExecutor->expects($this->at(0))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
             ->will($this->returnValue(0));
 
-        $expectedGitCommand = $this->winCompat("git remote set-url --push origin '{$pushUrl}'");
+        $expectedGitCommand = $this->winCompat("git remote set-url --push origin -- '{$pushUrl}'");
         $processExecutor->expects($this->at(1))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand), $this->equalTo(null), $this->equalTo($this->winCompat('composerPath')))
@@ -327,7 +327,7 @@ class GitDownloaderTest extends TestCase
 
     public function testDownloadThrowsRuntimeExceptionIfGitCommandFails()
     {
-        $expectedGitCommand = $this->winCompat("git clone --no-checkout 'https://example.com/composer/composer' 'composerPath' && cd 'composerPath' && git remote add composer 'https://example.com/composer/composer' && git fetch composer && git remote set-url origin 'https://example.com/composer/composer' && git remote set-url composer 'https://example.com/composer/composer'");
+        $expectedGitCommand = $this->winCompat("git clone --no-checkout -- 'https://example.com/composer/composer' 'composerPath' && cd 'composerPath' && git remote add composer -- 'https://example.com/composer/composer' && git fetch composer && git remote set-url origin -- 'https://example.com/composer/composer' && git remote set-url composer -- 'https://example.com/composer/composer'");
         $packageMock = $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
         $packageMock->expects($this->any())
             ->method('getSourceReference')
@@ -376,7 +376,7 @@ class GitDownloaderTest extends TestCase
 
     public function testUpdate()
     {
-        $expectedGitUpdateCommand = $this->winCompat("(git remote set-url composer 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer 'https://github.com/composer/composer'");
+        $expectedGitUpdateCommand = $this->winCompat("(git remote set-url composer -- 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- 'https://github.com/composer/composer'");
 
         $packageMock = $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
         $packageMock->expects($this->any())
@@ -407,7 +407,7 @@ class GitDownloaderTest extends TestCase
 
     public function testUpdateWithNewRepoUrl()
     {
-        $expectedGitUpdateCommand = $this->winCompat("(git remote set-url composer 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer 'https://github.com/composer/composer'");
+        $expectedGitUpdateCommand = $this->winCompat("(git remote set-url composer -- 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- 'https://github.com/composer/composer'");
 
         $packageMock = $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
         $packageMock->expects($this->any())
@@ -462,11 +462,11 @@ composer https://github.com/old/url (push)
             }));
         $processExecutor->expects($this->at(7))
             ->method('execute')
-            ->with($this->equalTo($this->winCompat("git remote set-url origin 'https://github.com/composer/composer'")), $this->equalTo(null), $this->equalTo($this->winCompat($this->workingDir)))
+            ->with($this->equalTo($this->winCompat("git remote set-url origin -- 'https://github.com/composer/composer'")), $this->equalTo(null), $this->equalTo($this->winCompat($this->workingDir)))
             ->will($this->returnValue(0));
         $processExecutor->expects($this->at(8))
             ->method('execute')
-            ->with($this->equalTo($this->winCompat("git remote set-url --push origin 'git@github.com:composer/composer.git'")), $this->equalTo(null), $this->equalTo($this->winCompat($this->workingDir)))
+            ->with($this->equalTo($this->winCompat("git remote set-url --push origin -- 'git@github.com:composer/composer.git'")), $this->equalTo(null), $this->equalTo($this->winCompat($this->workingDir)))
             ->will($this->returnValue(0));
 
         $this->fs->ensureDirectoryExists($this->workingDir.'/.git');
@@ -482,8 +482,8 @@ composer https://github.com/old/url (push)
      */
     public function testUpdateThrowsRuntimeExceptionIfGitCommandFails()
     {
-        $expectedGitUpdateCommand = $this->winCompat("(git remote set-url composer 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer 'https://github.com/composer/composer'");
-        $expectedGitUpdateCommand2 = $this->winCompat("(git remote set-url composer 'git@github.com:composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer 'git@github.com:composer/composer'");
+        $expectedGitUpdateCommand = $this->winCompat("(git remote set-url composer -- 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- 'https://github.com/composer/composer'");
+        $expectedGitUpdateCommand2 = $this->winCompat("(git remote set-url composer -- 'git@github.com:composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- 'git@github.com:composer/composer'");
 
         $packageMock = $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
         $packageMock->expects($this->any())
@@ -526,8 +526,8 @@ composer https://github.com/old/url (push)
 
     public function testUpdateDoesntThrowsRuntimeExceptionIfGitCommandFailsAtFirstButIsAbleToRecover()
     {
-        $expectedFirstGitUpdateCommand = $this->winCompat("(git remote set-url composer '".(Platform::isWindows() ? 'C:\\\\' : '/')."' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer '".(Platform::isWindows() ? 'C:\\\\' : '/')."'");
-        $expectedSecondGitUpdateCommand = $this->winCompat("(git remote set-url composer 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer 'https://github.com/composer/composer'");
+        $expectedFirstGitUpdateCommand = $this->winCompat("(git remote set-url composer -- '".(Platform::isWindows() ? 'C:\\\\' : '/')."' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- '".(Platform::isWindows() ? 'C:\\\\' : '/')."'");
+        $expectedSecondGitUpdateCommand = $this->winCompat("(git remote set-url composer -- 'https://github.com/composer/composer' && git rev-parse --quiet --verify 'ref^{commit}' || (git fetch composer && git fetch --tags composer)) && git remote set-url composer -- 'https://github.com/composer/composer'");
 
         $packageMock = $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
         $packageMock->expects($this->any())
diff --git a/tests/Composer/Test/Downloader/HgDownloaderTest.php b/tests/Composer/Test/Downloader/HgDownloaderTest.php
index cecf78b01..9065efcb4 100644
--- a/tests/Composer/Test/Downloader/HgDownloaderTest.php
+++ b/tests/Composer/Test/Downloader/HgDownloaderTest.php
@@ -69,13 +69,13 @@ class HgDownloaderTest extends TestCase
             ->will($this->returnValue(array('https://mercurial.dev/l3l0/composer')));
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
 
-        $expectedGitCommand = $this->getCmd('hg clone \'https://mercurial.dev/l3l0/composer\' \'composerPath\'');
+        $expectedGitCommand = $this->getCmd('hg clone -- \'https://mercurial.dev/l3l0/composer\' \'composerPath\'');
         $processExecutor->expects($this->at(0))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
             ->will($this->returnValue(0));
 
-        $expectedGitCommand = $this->getCmd('hg up \'ref\'');
+        $expectedGitCommand = $this->getCmd('hg up -- \'ref\'');
         $processExecutor->expects($this->at(1))
             ->method('execute')
             ->with($this->equalTo($expectedGitCommand))
@@ -122,7 +122,7 @@ class HgDownloaderTest extends TestCase
             ->method('execute')
             ->with($this->equalTo($expectedHgCommand))
             ->will($this->returnValue(0));
-        $expectedHgCommand = $this->getCmd("hg pull 'https://github.com/l3l0/composer' && hg up 'ref'");
+        $expectedHgCommand = $this->getCmd("hg pull -- 'https://github.com/l3l0/composer' && hg up -- 'ref'");
         $processExecutor->expects($this->at(1))
             ->method('execute')
             ->with($this->equalTo($expectedHgCommand))
diff --git a/tests/Composer/Test/Util/SvnTest.php b/tests/Composer/Test/Util/SvnTest.php
index 03a183583..ada3818ae 100644
--- a/tests/Composer/Test/Util/SvnTest.php
+++ b/tests/Composer/Test/Util/SvnTest.php
@@ -60,7 +60,7 @@ class SvnTest extends TestCase
         $reflMethod->setAccessible(true);
 
         $this->assertEquals(
-            $this->getCmd("svn ls --non-interactive  'http://svn.example.org'"),
+            $this->getCmd("svn ls --non-interactive  -- 'http://svn.example.org'"),
             $reflMethod->invokeArgs($svn, array('svn ls', $url))
         );
     }