diff --git a/src/Composer/Autoload/AutoloadGenerator.php b/src/Composer/Autoload/AutoloadGenerator.php
index ec604bcd2..c70c20f36 100644
--- a/src/Composer/Autoload/AutoloadGenerator.php
+++ b/src/Composer/Autoload/AutoloadGenerator.php
@@ -28,8 +28,6 @@ use Composer\Script\ScriptEvents;
  */
 class AutoloadGenerator
 {
-    const EXCLUDE_PATTERN = '.*%s';
-
     /**
      * @var EventDispatcher
      */
@@ -677,7 +675,7 @@ FOOTER;
 
             foreach ($autoload[$type] as $namespace => $paths) {
                 foreach ((array) $paths as $path) {
-                    if (($type === 'files' || $type === 'classmap') && $package->getTargetDir() && !is_readable($installPath.'/'.$path)) {
+                    if (($type === 'files' || $type === 'classmap' || $type === 'exclude-from-classmap') && $package->getTargetDir() && !is_readable($installPath.'/'.$path)) {
                         // remove target-dir from file paths of the root package
                         if ($package === $mainPackage) {
                             $targetDir = str_replace('\\<dirsep\\>', '[\\\\/]', preg_quote(str_replace(array('/', '\\'), '<dirsep>', $package->getTargetDir())));
@@ -690,17 +688,9 @@ FOOTER;
 
                     if ($type === 'exclude-from-classmap') {
                         // first escape user input
-                        $path = sprintf(self::EXCLUDE_PATTERN, preg_quote($path));
+                        $path = preg_quote(trim(strtr($path, '\\', '/'), '/'));
 
-                        if ($package === $mainPackage && $package->getTargetDir() && !is_readable($installPath.'/'.$path)) {
-                            // remove target-dir from classmap entries of the root package
-                            $targetDir = str_replace('\\<dirsep\\>', '[\\\\/]', preg_quote(str_replace(array('/', '\\'), '<dirsep>', $package->getTargetDir())));
-                            $path = ltrim(preg_replace('{^'.$targetDir.'}', '', ltrim($path, '\\/')), '\\/');
-                        } elseif ($package !== $mainPackage && $package->getTargetDir() && !is_readable($installPath.'/'.$path)) {
-                            // add target-dir to exclude entries that don't have it
-                            $path = preg_quote($package->getTargetDir()) . '/' . $path;
-                        }
-                        $autoloads[] = empty($installPath) ? $path : preg_quote($installPath) . '/' . $path;
+                        $autoloads[] = empty($installPath) ? preg_quote(strtr(getcwd(), '\\', '/')) . '/' . $path : preg_quote($installPath) . '/' . $path;
                         continue;
                     }
 
diff --git a/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php b/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
index efc3a6a93..0e373702b 100644
--- a/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
+++ b/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
@@ -1274,7 +1274,7 @@ EOF;
                 'Acme\Cake\\' => array('src-cake/', 'lib-cake/'),
             ),
             'classmap' => array('composersrc/'),
-            'exclude-from-classmap' => array('/tests/', 'Exclude.php'),
+            'exclude-from-classmap' => array('/composersrc/excludedTests/', '/composersrc/ClassToExclude.php'),
         ));
 
         $this->repository->expects($this->once())
@@ -1282,9 +1282,10 @@ EOF;
             ->will($this->returnValue(array()));
 
         $this->fs->ensureDirectoryExists($this->workingDir.'/composer');
-        $this->fs->ensureDirectoryExists($this->workingDir.'/src/Lala');
+        $this->fs->ensureDirectoryExists($this->workingDir.'/src/Lala/Test');
         $this->fs->ensureDirectoryExists($this->workingDir.'/lib');
         file_put_contents($this->workingDir.'/src/Lala/ClassMapMain.php', '<?php namespace Lala; class ClassMapMain {}');
+        file_put_contents($this->workingDir.'/src/Lala/Test/ClassMapMainTest.php', '<?php namespace Lala\Test; class ClassMapMainTest {}');
 
         $this->fs->ensureDirectoryExists($this->workingDir.'/src-fruit');
         $this->fs->ensureDirectoryExists($this->workingDir.'/src-cake');
@@ -1296,7 +1297,8 @@ EOF;
         file_put_contents($this->workingDir.'/composersrc/foo.php', '<?php class ClassMapFoo {}');
 
         // this classes should not be found in the classmap
-        file_put_contents($this->workingDir.'/composersrc/tests/bar.php', '<?php class ClassExcludeMapFoo {}');
+        $this->fs->ensureDirectoryExists($this->workingDir.'/composersrc/excludedTests');
+        file_put_contents($this->workingDir.'/composersrc/excludedTests/bar.php', '<?php class ClassExcludeMapFoo {}');
         file_put_contents($this->workingDir.'/composersrc/ClassToExclude.php', '<?php class ClassClassToExclude {}');
 
         $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', true, '_1');