diff --git a/src/Symfony/Component/Filesystem/CHANGELOG.md b/src/Symfony/Component/Filesystem/CHANGELOG.md
index a4c0479f7d9a..e870a48a2cf4 100644
--- a/src/Symfony/Component/Filesystem/CHANGELOG.md
+++ b/src/Symfony/Component/Filesystem/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+3.0.0
+-----
+
+ * removed `$mode` argument from `Filesystem::dumpFile()`
+
 2.6.0
 -----
 
diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index 03f44e6c37ec..ce04a00f1211 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -455,14 +455,12 @@ public function isAbsolutePath($file)
     /**
      * Atomically dumps content into a file.
      *
-     * @param string   $filename The file to be written to.
-     * @param string   $content  The data to write into the file.
-     * @param null|int $mode     The file mode (octal). If null, file permissions are not modified
-     *                           Deprecated since version 2.3.12, to be removed in 3.0.
+     * @param string $filename The file to be written to.
+     * @param string $content  The data to write into the file.
      *
      * @throws IOException If the file cannot be written to.
      */
-    public function dumpFile($filename, $content, $mode = 0666)
+    public function dumpFile($filename, $content)
     {
         $dir = dirname($filename);
 
@@ -479,9 +477,6 @@ public function dumpFile($filename, $content, $mode = 0666)
         }
 
         $this->rename($tmpFile, $filename, true);
-        if (null !== $mode) {
-            $this->chmod($filename, $mode);
-        }
     }
 
     /**
diff --git a/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php b/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
index 538994a1f52d..a101cad0b825 100644
--- a/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
+++ b/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
@@ -19,7 +19,7 @@
 class FilesystemTest extends FilesystemTestCase
 {
     /**
-     * @var \Symfony\Component\Filesystem\Filesystem $filesystem
+     * @var \Symfony\Component\Filesystem\Filesystem
      */
     private $filesystem = null;
 
@@ -959,22 +959,7 @@ public function testDumpFile()
     {
         $filename = $this->workspace.DIRECTORY_SEPARATOR.'foo'.DIRECTORY_SEPARATOR.'baz.txt';
 
-        $this->filesystem->dumpFile($filename, 'bar', 0753);
-
-        $this->assertFileExists($filename);
-        $this->assertSame('bar', file_get_contents($filename));
-
-        // skip mode check on Windows
-        if ('\\' !== DIRECTORY_SEPARATOR) {
-            $this->assertFilePermissions(753, $filename);
-        }
-    }
-
-    public function testDumpFileWithNullMode()
-    {
-        $filename = $this->workspace.DIRECTORY_SEPARATOR.'foo'.DIRECTORY_SEPARATOR.'baz.txt';
-
-        $this->filesystem->dumpFile($filename, 'bar', null);
+        $this->filesystem->dumpFile($filename, 'bar');
 
         $this->assertFileExists($filename);
         $this->assertSame('bar', file_get_contents($filename));