diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 99add77..f35e6e0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,4 +1,4 @@
-name: ci
+name: tests
 
 on:
   push:
@@ -6,8 +6,8 @@ on:
   pull_request:
 
 jobs:
-  ci:
-    name: ci
+  tests:
+    name: tests
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -37,7 +37,6 @@ jobs:
         run: |
           cargo fmt --all -- --check
           cargo clippy
-
+      
       - name: test
-        run: cargo test --all
-
+        run: cargo test --all -- --skip third_party
diff --git a/.github/workflows/third-party-tests.yml b/.github/workflows/third-party-tests.yml
new file mode 100644
index 0000000..4dfe2d8
--- /dev/null
+++ b/.github/workflows/third-party-tests.yml
@@ -0,0 +1,35 @@
+name: third-party
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  third-party-tests:
+    name: third-party
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        rust:
+          - 'stable'
+        os:
+          - 'ubuntu-latest'
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+
+      - name: install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          override: true
+          components: rustfmt, clippy
+
+      - name: cache
+        uses: Swatinem/rust-cache@v2.0.0
+
+      - name: test third-party
+        run: cargo test third_party
diff --git a/tests/third_party_tests.rs b/tests/third_party_tests.rs
new file mode 100644
index 0000000..ca3d098
--- /dev/null
+++ b/tests/third_party_tests.rs
@@ -0,0 +1,91 @@
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+use std::process::Command;
+
+use php_parser_rs::Lexer;
+use php_parser_rs::Parser;
+
+#[test]
+fn third_party_php_standard_library() {
+    test_repository(
+        "php-standard-library",
+        "https://github.com/azjezz/psl.git",
+        "2.2.x",
+        &["src", "tests", "examples"],
+    );
+}
+
+fn test_repository(name: &str, repository: &str, branch: &str, directories: &[&str]) {
+    let out_dir = env::var_os("OUT_DIR").expect("failed to get OUT_DIR");
+    let out_path = PathBuf::from(out_dir).join(name);
+
+    if !out_path.exists() {
+        let output = Command::new("git")
+            .arg("clone")
+            .arg("--depth")
+            .arg("1")
+            .arg("-b")
+            .arg(branch)
+            .arg(repository)
+            .arg(&out_path)
+            .output()
+            .expect("failed to  run git.");
+
+        if !output.status.success() {
+            panic!("failed to clone repository: {:#?}", output)
+        }
+    }
+
+    for dir in directories {
+        test_directory(out_path.clone(), out_path.join(dir));
+    }
+}
+
+fn test_directory(root: PathBuf, directory: PathBuf) {
+    let mut entries = fs::read_dir(directory)
+        .unwrap()
+        .flatten()
+        .map(|entry| entry.path())
+        .collect::<Vec<PathBuf>>();
+
+    entries.sort();
+
+    for entry in entries {
+        if entry.is_dir() {
+            test_directory(root.clone(), entry);
+
+            continue;
+        }
+
+        if entry.is_file() && entry.extension().unwrap_or_default() == "php" {
+            let name_entry = entry.clone();
+            let fullanme_string = name_entry.to_string_lossy();
+            let name = fullanme_string
+                .strip_prefix(root.to_str().unwrap())
+                .unwrap();
+
+            test_file(name, entry);
+        }
+    }
+}
+
+fn test_file(name: &str, filename: PathBuf) {
+    let code = std::fs::read_to_string(&filename).unwrap();
+
+    Lexer::new(None)
+        .tokenize(code.as_bytes())
+        .map(|tokens| {
+            Parser::new(None)
+                .parse(tokens)
+                .map(|_| {
+                    println!("✅ successfully parsed file: `\"{}\"`.", name);
+                })
+                .unwrap_or_else(|error| {
+                    panic!("❌ failed to parse file: `\"{name}\"`, error: {error:?}")
+                })
+        })
+        .unwrap_or_else(|error| {
+            panic!("❌ failed to tokenize file: `\"{name}\"`, error: {error:?}")
+        });
+}