diff --git a/Extension/CodeExtension.php b/Extension/CodeExtension.php
index 96ded292..cdeb69a5 100644
--- a/Extension/CodeExtension.php
+++ b/Extension/CodeExtension.php
@@ -41,8 +41,8 @@ public function __construct(string|FileLinkFormatter $fileLinkFormat, string $pr
     public function getFilters(): array
     {
         return [
-            new TwigFilter('abbr_class', $this->abbrClass(...), ['is_safe' => ['html']]),
-            new TwigFilter('abbr_method', $this->abbrMethod(...), ['is_safe' => ['html']]),
+            new TwigFilter('abbr_class', $this->abbrClass(...), ['is_safe' => ['html'], 'pre_escape' => 'html']),
+            new TwigFilter('abbr_method', $this->abbrMethod(...), ['is_safe' => ['html'], 'pre_escape' => 'html']),
             new TwigFilter('format_args', $this->formatArgs(...), ['is_safe' => ['html']]),
             new TwigFilter('format_args_as_text', $this->formatArgsAsText(...)),
             new TwigFilter('file_excerpt', $this->fileExcerpt(...), ['is_safe' => ['html']]),
@@ -84,22 +84,23 @@ public function formatArgs(array $args): string
         $result = [];
         foreach ($args as $key => $item) {
             if ('object' === $item[0]) {
+                $item[1] = htmlspecialchars($item[1], \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset);
                 $parts = explode('\\', $item[1]);
                 $short = array_pop($parts);
                 $formattedValue = sprintf('<em>object</em>(<abbr title="%s">%s</abbr>)', $item[1], $short);
             } elseif ('array' === $item[0]) {
-                $formattedValue = sprintf('<em>array</em>(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
+                $formattedValue = sprintf('<em>array</em>(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : htmlspecialchars(var_export($item[1], true), \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset));
             } elseif ('null' === $item[0]) {
                 $formattedValue = '<em>null</em>';
             } elseif ('boolean' === $item[0]) {
-                $formattedValue = '<em>'.strtolower(var_export($item[1], true)).'</em>';
+                $formattedValue = '<em>'.strtolower(htmlspecialchars(var_export($item[1], true), \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset)).'</em>';
             } elseif ('resource' === $item[0]) {
                 $formattedValue = '<em>resource</em>';
             } else {
                 $formattedValue = str_replace("\n", '', htmlspecialchars(var_export($item[1], true), \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset));
             }
 
-            $result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
+            $result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", htmlspecialchars($key, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset), $formattedValue);
         }
 
         return implode(', ', $result);
@@ -161,11 +162,14 @@ public function formatFile(string $file, int $line, string $text = null): string
         $file = trim($file);
 
         if (null === $text) {
-            $text = $file;
-            if (null !== $rel = $this->getFileRelative($text)) {
-                $rel = explode('/', $rel, 2);
-                $text = sprintf('<abbr title="%s%2$s">%s</abbr>%s', $this->projectDir, $rel[0], '/'.($rel[1] ?? ''));
+            if (null !== $rel = $this->getFileRelative($file)) {
+                $rel = explode('/', htmlspecialchars($rel, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset), 2);
+                $text = sprintf('<abbr title="%s%2$s">%s</abbr>%s', htmlspecialchars($this->projectDir, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset), $rel[0], '/'.($rel[1] ?? ''));
+            } else {
+                $text = htmlspecialchars($file, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset);
             }
+        } else {
+            $text = htmlspecialchars($text, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset);
         }
 
         if (0 < $line) {
diff --git a/Tests/Extension/CodeExtensionTest.php b/Tests/Extension/CodeExtensionTest.php
index ae7cf786..08defaac 100644
--- a/Tests/Extension/CodeExtensionTest.php
+++ b/Tests/Extension/CodeExtensionTest.php
@@ -14,6 +14,8 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\CodeExtension;
 use Symfony\Component\ErrorHandler\ErrorRenderer\FileLinkFormatter;
+use Twig\Environment;
+use Twig\Loader\ArrayLoader;
 
 class CodeExtensionTest extends TestCase
 {
@@ -28,42 +30,136 @@ public function testFileRelative()
         $this->assertEquals('file.txt', $this->getExtension()->getFileRelative(\DIRECTORY_SEPARATOR.'project'.\DIRECTORY_SEPARATOR.'file.txt'));
     }
 
-    /**
-     * @dataProvider getClassNameProvider
-     */
-    public function testGettingClassAbbreviation($class, $abbr)
+    public function testClassAbbreviationIntegration()
     {
-        $this->assertEquals($this->getExtension()->abbrClass($class), $abbr);
+        $data = [
+            'fqcn' => 'F\Q\N\Foo',
+            'xss' => '<script>',
+        ];
+
+        $template = <<<'TWIG'
+{{ 'Bare'|abbr_class }}
+{{ fqcn|abbr_class }}
+{{ xss|abbr_class }}
+TWIG;
+
+        $expected = <<<'HTML'
+<abbr title="Bare">Bare</abbr>
+<abbr title="F\Q\N\Foo">Foo</abbr>
+<abbr title="&lt;script&gt;">&lt;script&gt;</abbr>
+HTML;
+
+        $this->assertEquals($expected, $this->render($template, $data));
     }
 
-    /**
-     * @dataProvider getMethodNameProvider
-     */
-    public function testGettingMethodAbbreviation($method, $abbr)
+    public function testMethodAbbreviationIntegration()
     {
-        $this->assertEquals($this->getExtension()->abbrMethod($method), $abbr);
+        $data = [
+            'fqcn' => 'F\Q\N\Foo::Method',
+            'xss' => '<script>',
+        ];
+
+        $template = <<<'TWIG'
+{{ 'Bare::Method'|abbr_method }}
+{{ fqcn|abbr_method }}
+{{ 'Closure'|abbr_method }}
+{{ 'Method'|abbr_method }}
+{{ xss|abbr_method }}
+TWIG;
+
+        $expected = <<<'HTML'
+<abbr title="Bare">Bare</abbr>::Method()
+<abbr title="F\Q\N\Foo">Foo</abbr>::Method()
+<abbr title="Closure">Closure</abbr>
+<abbr title="Method">Method</abbr>()
+<abbr title="&lt;script&gt;">&lt;script&gt;</abbr>()
+HTML;
+
+        $this->assertEquals($expected, $this->render($template, $data));
     }
 
-    public static function getClassNameProvider(): array
+    public function testFormatArgsIntegration()
     {
-        return [
-            ['F\Q\N\Foo', '<abbr title="F\Q\N\Foo">Foo</abbr>'],
-            ['Bare', '<abbr title="Bare">Bare</abbr>'],
+        $data = [
+            'args' => [
+                ['object', 'Foo'],
+                ['array', [['string', 'foo'], ['null']]],
+                ['resource'],
+                ['string', 'bar'],
+                ['int', 123],
+                ['bool', true],
+            ],
+            'xss' => [
+                ['object', '<Foo>'],
+                ['array', [['string', '<foo>']]],
+                ['string', '<bar>'],
+                ['int', 123],
+                ['bool', true],
+                ['<xss>', '<script>'],
+            ],
         ];
+
+        $template = <<<'TWIG'
+{{ args|format_args }}
+{{ xss|format_args }}
+{{ args|format_args_as_text }}
+{{ xss|format_args_as_text }}
+TWIG;
+
+        $expected = <<<'HTML'
+<em>object</em>(<abbr title="Foo">Foo</abbr>), <em>array</em>('foo', <em>null</em>), <em>resource</em>, 'bar', 123, true
+<em>object</em>(<abbr title="&lt;Foo&gt;">&lt;Foo&gt;</abbr>), <em>array</em>('&lt;foo&gt;'), '&lt;bar&gt;', 123, true, '&lt;script&gt;'
+object(Foo), array(&#039;foo&#039;, null), resource, &#039;bar&#039;, 123, true
+object(&amp;lt;Foo&amp;gt;), array(&#039;&amp;lt;foo&amp;gt;&#039;), &#039;&amp;lt;bar&amp;gt;&#039;, 123, true, &#039;&amp;lt;script&amp;gt;&#039;
+HTML;
+
+        $this->assertEquals($expected, $this->render($template, $data));
+    }
+
+
+    public function testFormatFileIntegration()
+    {
+        $template = <<<'TWIG'
+{{ 'foo/bar/baz.php'|format_file(21) }}
+TWIG;
+
+        $expected = <<<'HTML'
+<a href="proto://foo/bar/baz.php#&amp;line=21" title="Click to open this file" class="file_link">foo/bar/baz.php at line 21</a>
+HTML;
+
+        $this->assertEquals($expected, $this->render($template));
     }
 
-    public static function getMethodNameProvider(): array
+    public function testFormatFileFromTextIntegration()
     {
-        return [
-            ['F\Q\N\Foo::Method', '<abbr title="F\Q\N\Foo">Foo</abbr>::Method()'],
-            ['Bare::Method', '<abbr title="Bare">Bare</abbr>::Method()'],
-            ['Closure', '<abbr title="Closure">Closure</abbr>'],
-            ['Method', '<abbr title="Method">Method</abbr>()'],
-        ];
+        $template = <<<'TWIG'
+{{ 'in "foo/bar/baz.php" at line 21'|format_file_from_text }}
+{{ 'in &quot;foo/bar/baz.php&quot; on line 21'|format_file_from_text }}
+{{ 'in "<script>" on line 21'|format_file_from_text }}
+TWIG;
+
+        $expected = <<<'HTML'
+in <a href="proto://foo/bar/baz.php#&amp;line=21" title="Click to open this file" class="file_link">foo/bar/baz.php at line 21</a>
+in <a href="proto://foo/bar/baz.php#&amp;line=21" title="Click to open this file" class="file_link">foo/bar/baz.php at line 21</a>
+in <a href="proto://&lt;script&gt;#&amp;line=21" title="Click to open this file" class="file_link">&lt;script&gt; at line 21</a>
+HTML;
+
+        $this->assertEquals($expected, $this->render($template));
     }
 
     protected function getExtension(): CodeExtension
     {
         return new CodeExtension(new FileLinkFormatter('proto://%f#&line=%l&'.substr(__FILE__, 0, 5).'>foobar'), \DIRECTORY_SEPARATOR.'project', 'UTF-8');
     }
+
+    private function render(string $template, array $context = [])
+    {
+        $twig = new Environment(
+            new ArrayLoader(['index' => $template]),
+            ['debug' => true]
+        );
+        $twig->addExtension($this->getExtension());
+
+        return $twig->render('index', $context);
+    }
 }