diff --git a/src/Symfony/Component/Console/CHANGELOG.md b/src/Symfony/Component/Console/CHANGELOG.md
index 3952997e64ee0..fdf77cb8a57e7 100644
--- a/src/Symfony/Component/Console/CHANGELOG.md
+++ b/src/Symfony/Component/Console/CHANGELOG.md
@@ -4,6 +4,7 @@ CHANGELOG
 4.0.0
 -----
 
+ * `OutputFormatter` throws an exception when unknown options are used
  * removed `QuestionHelper::setInputStream()/getInputStream()`
  * removed `Application::getTerminalWidth()/getTerminalHeight()` and 
   `Application::setTerminalDimensions()/getTerminalDimensions()`
diff --git a/src/Symfony/Component/Console/Formatter/OutputFormatter.php b/src/Symfony/Component/Console/Formatter/OutputFormatter.php
index d32f0915de010..2befd74ea7f8c 100644
--- a/src/Symfony/Component/Console/Formatter/OutputFormatter.php
+++ b/src/Symfony/Component/Console/Formatter/OutputFormatter.php
@@ -211,13 +211,7 @@ private function createStyleFromString($string)
                 preg_match_all('([^,;]+)', $match[1], $options);
                 $options = array_shift($options);
                 foreach ($options as $option) {
-                    try {
-                        $style->setOption($option);
-                    } catch (\InvalidArgumentException $e) {
-                        @trigger_error(sprintf('Unknown style options are deprecated since version 3.2 and will be removed in 4.0. Exception "%s".', $e->getMessage()), E_USER_DEPRECATED);
-
-                        return false;
-                    }
+                    $style->setOption($option);
                 }
             } else {
                 return false;
diff --git a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
index 4b11028be5e35..05647cd258a72 100644
--- a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
+++ b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
@@ -193,17 +193,6 @@ public function provideInlineStyleOptionsCases()
         );
     }
 
-    /**
-     * @group legacy
-     * @dataProvider provideInlineStyleTagsWithUnknownOptions
-     * @expectedDeprecation Unknown style options are deprecated since version 3.2 and will be removed in 4.0. Exception "Invalid option specified: "%s". Expected one of (bold, underscore, blink, reverse, conceal)".
-     */
-    public function testInlineStyleOptionsUnknownAreDeprecated($tag, $option)
-    {
-        $formatter = new OutputFormatter(true);
-        $formatter->format($tag);
-    }
-
     public function provideInlineStyleTagsWithUnknownOptions()
     {
         return array(