diff --git a/lsp/Cargo.toml b/lsp/Cargo.toml
index 2619d3d..9c06aea 100644
--- a/lsp/Cargo.toml
+++ b/lsp/Cargo.toml
@@ -10,5 +10,5 @@ tower-lsp = "0.20.0"
 git2 = { version = "0.19.0", default-features = false }
 serde_json = { version = "1.0.122", features = ["std"] }
 lazy_static = "1.5.0"
-regex = { version = "1.10.6", default-features = false, features = ["std", "perf", "unicode-case"] }
+regex = { version = "1.10.6", default-features = false, features = ["std", "perf", "unicode-case", "unicode-perl"] }
 urlencoding = "2.1.3"
diff --git a/lsp/src/languages.rs b/lsp/src/languages.rs
index 9308bb0..789430a 100644
--- a/lsp/src/languages.rs
+++ b/lsp/src/languages.rs
@@ -45,3 +45,17 @@ pub fn get_language(document: &Document) -> String {
 
     String::from("text")
 }
+
+#[cfg(test)]
+mod tests {
+    use tower_lsp::lsp_types::Url;
+
+    use super::*;
+
+    #[test]
+    fn test_unicode_perl() {
+        let document = Document::new(Url::parse("file:///home/user/file.php").unwrap());
+        let lang = get_language(&document);
+        assert_eq!(lang, "php");
+    }
+}