diff --git a/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/StringLiteralLanguageInjectorTest.java b/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/StringLiteralLanguageInjectorTest.java
new file mode 100644
index 000000000..183976221
--- /dev/null
+++ b/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/StringLiteralLanguageInjectorTest.java
@@ -0,0 +1,334 @@
+package fr.adrienbrault.idea.symfony2plugin.tests.lang;
+
+import com.intellij.testFramework.fixtures.InjectionTestFixture;
+import com.jetbrains.php.lang.PhpFileType;
+import fr.adrienbrault.idea.symfony2plugin.tests.SymfonyLightCodeInsightFixtureTestCase;
+import org.jetbrains.annotations.NotNull;
+
+import static fr.adrienbrault.idea.symfony2plugin.lang.StringLiteralLanguageInjector.LANGUAGE_ID_EXPRESSION_LANGUAGE;
+
+public class StringLiteralLanguageInjectorTest extends SymfonyLightCodeInsightFixtureTestCase {
+
+    private InjectionTestFixture injectionTestFixture;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        myFixture.copyFileToProject("classes.php");
+        injectionTestFixture = new InjectionTestFixture(myFixture);
+    }
+
+    public String getTestDataPath() {
+        return "src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/fixtures";
+    }
+
+    public void testExpressionLanguageLanguageInjections() {
+        assertInjectedLangAtCaret(
+            "<?php $expr = new \\Symfony\\Component\\ExpressionLanguage\\Expression('<caret>');",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php \n" +
+            "$expr = new \\Symfony\\Component\\ExpressionLanguage\\ExpressionLanguage(); \n" +
+            "$expr->evaluate('<caret>');\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php \n" +
+            "$expr = new \\Symfony\\Component\\ExpressionLanguage\\ExpressionLanguage(); \n" +
+            "$expr->compile('<caret>');\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php \n" +
+            "$expr = new \\Symfony\\Component\\ExpressionLanguage\\ExpressionLanguage(); \n" +
+            "$expr->parse('<caret>');\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php \n" +
+            "$routes = new \\Symfony\\Component\\Routing\\Loader\\Configurator\\RoutingConfigurator();\n" +
+            "$routes->condition('<caret>');\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php \n" +
+            "$routes = new \\Symfony\\Component\\Routing\\Loader\\Configurator\\RoutingConfigurator();\n" +
+            "$routes->condition(condition: '<caret>');\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Routing\\Annotation\\Route;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Route(\"/contact\", condition: \"<caret>\")]\n" +
+            "    public function contact() {}\n" +
+            "}\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Routing\\Annotation\\Route;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Route([], \"/contact\", \"contact\", [], [], [], null, [], [], '<caret>')]\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Routing\\Annotation\\Route;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Route(\"/contact\", name=\"contact\", condition=\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Route;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Route(\"/contact\", name=\"contact\", condition=\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Validator\\Constraints\\Expression;\n" +
+            "\n" +
+            "#[Expression(\"<caret>\")]\n" +
+            "class BlogPost {}\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Validator\\Constraints\\Expression;\n" +
+            "\n" +
+            "/**\n" +
+            " * @Expression(\"<caret>\")\n" +
+            " */\n" +
+            "class BlogPost {}\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Validator\\Constraints\\Expression;\n" +
+            "\n" +
+            "/**\n" +
+            " * @Expression(expression: \"<caret>\")\n" +
+            " */\n" +
+            "class BlogPost {}\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Symfony\\Component\\Validator\\Constraints\\Expression;\n" +
+            "\n" +
+            "#[Expression(expression: \"<caret>\")]\n" +
+            "class BlogPost {}\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Security;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Security(\"<caret>\")]\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Security;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Security(data: \"<caret>\")]\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Security;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Security(\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Security;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Security(expression=\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Cache;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Cache(lastModified: '<caret>')]\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Cache;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Cache(ETag: '<caret>')]\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Cache;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Cache(lastModified=\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Cache;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Cache(Etag=\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact() {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Entity;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Entity('post', expr: '<caret>')]\n" +
+            "    public function contact($post) {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Entity;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    #[Entity('post', '<caret>')]\n" +
+            "    public function contact($post) {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php\n" +
+            "\n" +
+            "use Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\Entity;\n" +
+            "\n" +
+            "class ExampleController\n" +
+            "{\n" +
+            "    /**\n" +
+            "     * @Entity('post', expr=\"<caret>\")\n" +
+            "     */\n" +
+            "    public function contact($post) {}\n" +
+            "}",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php $expr = \\Symfony\\Component\\DependencyInjection\\Loader\\Configurator\\expr(\"<caret>\");\n",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+
+        assertInjectedLangAtCaret(
+            "<?php $expr = \\Symfony\\Component\\DependencyInjection\\Loader\\Configurator\\expr(expression: \"<caret>\");",
+            LANGUAGE_ID_EXPRESSION_LANGUAGE
+        );
+    }
+
+    private void assertInjectedLangAtCaret(@NotNull String configureByText, @NotNull String lang) {
+        myFixture.configureByText(PhpFileType.INSTANCE, configureByText);
+        injectionTestFixture.assertInjectedLangAtCaret(lang);
+    }
+}
diff --git a/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/fixtures/classes.php b/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/fixtures/classes.php
index b113d0fa9..0efda91dd 100644
--- a/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/fixtures/classes.php
+++ b/src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/lang/fixtures/classes.php
@@ -23,6 +23,143 @@ public static function fromJsonString() {}
         public function setJson() {}
     }
 }
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator {
+    function expr(string $expression) {}
+}
+
+namespace Symfony\Component\ExpressionLanguage {
+    class ExpressionLanguage
+    {
+        public function compile($expression, array $names = []) {}
+        public function evaluate($expression, array $values = []) {}
+        public function parse($expression, array $names = []) {}
+    }
+
+    class Expression
+    {
+        public function __construct(string $expression) {}
+    }
+}
+
+namespace Symfony\Component\Routing\Annotation {
+    /**
+     * @Annotation
+     * @Target({"CLASS", "METHOD"})
+     */
+    #[\Attribute(\Attribute::IS_REPEATABLE | \Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD)]
+    class Route
+    {
+        public function __construct(
+            $data = [],
+            $path = null,
+            string $name = null,
+            array $requirements = [],
+            array $options = [],
+            array $defaults = [],
+            string $host = null,
+            array $methods = [],
+            array $schemes = [],
+            string $condition = null,
+            int $priority = null,
+            string $locale = null,
+            string $format = null,
+            bool $utf8 = null,
+            bool $stateless = null
+        ) {}
+    }
+}
+
+namespace Symfony\Component\Routing\Loader\Configurator\Traits {
+    trait RouteTrait
+    {
+        public function condition(string $condition): {}
+    }
+}
+
+namespace Symfony\Component\Routing\Loader\Configurator {
+    class RoutingConfigurator
+    {
+        use \Symfony\Component\Routing\Loader\Configurator\Traits\RouteTrait;
+    }
+}
+
+namespace Symfony\Component\Validator\Constraints {
+    /**
+     * @Annotation
+     * @Target({"CLASS", "PROPERTY", "METHOD", "ANNOTATION"})
+     */
+    #[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::TARGET_CLASS | \Attribute::IS_REPEATABLE)]
+    class Expression
+    {
+        public function __construct(
+            $expression,
+            string $message = null,
+            array $values = null,
+            array $groups = null,
+            $payload = null,
+            array $options = []
+        ) {}
+    }
+}
+
+namespace Sensio\Bundle\FrameworkExtraBundle\Configuration {
+    /**
+     * @Annotation
+     */
+     #[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD)]
+    class Cache
+    {
+        public function __construct(
+            array $values = [],
+            string $expires = null,
+            $maxage = null,
+            $smaxage = null,
+            bool $public = null,
+            bool $mustRevalidate = null,
+            array $vary = null,
+            string $lastModified = null,
+            string $etag = null,
+            $maxstale = null,
+            $staleWhileRevalidate = null,
+            $staleIfError = null
+        ) {}
+    }
+
+    /**
+     * @Annotation
+     */
+     #[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD)]
+    class Entity {
+        public function __construct(
+            $data = [],
+            string $expr = null,
+            string $class = null,
+            array $options = [],
+            bool $isOptional = false,
+            string $converter = null
+        ) {}
+    }
+
+    /**
+     * @Annotation
+     */
+     #[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD)]
+    class Security
+    {
+        public function __construct(
+            $data = [],
+            string $message = null,
+            ?int $statusCode = null
+        ) {}
+    }
+
+    /**
+     * @Annotation
+     */
+    class Route extends \Symfony\Component\Routing\Annotation\Route {}
+}
+
 namespace Doctrine\ORM {
     class EntityManager {
         public function createQuery() {}