diff --git a/src/Symfony/Component/Process/CHANGELOG.md b/src/Symfony/Component/Process/CHANGELOG.md
index a9f9173580afe..726a24c61423c 100644
--- a/src/Symfony/Component/Process/CHANGELOG.md
+++ b/src/Symfony/Component/Process/CHANGELOG.md
@@ -15,6 +15,8 @@ CHANGELOG
  * support for passing `proc_open()` options has been removed
  * removed the `ProcessBuilder` class, use the `Process` class instead
  * removed the `getEnhanceWindowsCompatibility()` and `setEnhanceWindowsCompatibility()` methods of the `Process` class
+ * passing a not existing working directory to the constructor of the `Symfony\Component\Process\Process` class is not
+   supported anymore
 
 3.4.0
 -----
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index a9c63e9be11bb..7c5e4a5a338aa 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -297,11 +297,7 @@ public function start(callable $callback = null, array $env = array())
         }
 
         if (!is_dir($this->cwd)) {
-            if ('\\' === DIRECTORY_SEPARATOR) {
-                throw new RuntimeException('The provided cwd does not exist.');
-            }
-
-            @trigger_error('The provided cwd does not exist. Command is currently ran against getcwd(). This behavior is deprecated since version 3.4 and will be removed in 4.0.', E_USER_DEPRECATED);
+            throw new RuntimeException('The provided cwd does not exist.');
         }
 
         $this->process = proc_open($commandline, $descriptors, $this->processPipes->pipes, $this->cwd, null, $options);
diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index 06ab288e6af34..8d490f361a216 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -47,34 +47,12 @@ protected function tearDown()
         }
     }
 
-    /**
-     * @group legacy
-     * @expectedDeprecation The provided cwd does not exist. Command is currently ran against getcwd(). This behavior is deprecated since version 3.4 and will be removed in 4.0.
-     */
-    public function testInvalidCwd()
-    {
-        if ('\\' === DIRECTORY_SEPARATOR) {
-            $this->markTestSkipped('Windows handles this automatically.');
-        }
-
-        // Check that it works fine if the CWD exists
-        $cmd = new Process('echo test', __DIR__);
-        $cmd->run();
-
-        $cmd = new Process('echo test', __DIR__.'/notfound/');
-        $cmd->run();
-    }
-
     /**
      * @expectedException \Symfony\Component\Process\Exception\RuntimeException
      * @expectedExceptionMessage The provided cwd does not exist.
      */
-    public function testInvalidCwdOnWindows()
+    public function testInvalidCwd()
     {
-        if ('\\' !== DIRECTORY_SEPARATOR) {
-            $this->markTestSkipped('Unix handles this automatically.');
-        }
-
         try {
             // Check that it works fine if the CWD exists
             $cmd = new Process('echo test', __DIR__);