diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 32deb26..c93237b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,6 +23,8 @@ jobs:
         steps:
             - name: Check-out repository
               uses: actions/checkout@v4
+              with:
+                  submodules: recursive
 
             - name: Install libaudio Dependencies (macOS)
               if: runner.os == 'macOS'
@@ -101,8 +103,10 @@ jobs:
               run: uv sync
 
             - name: Run tests
-              run: uv run pytest -v --tb=short --color=yes
+              run: uv run pytest test/libs/ -v --tb=short --color=yes
               continue-on-error: false
+              env:
+                  PYTHONPATH: ${{ github.workspace }}
 
             - name: Upload test artifacts
               if: failure()
diff --git a/libs/__init__.py b/libs/__init__.py
new file mode 100644
index 0000000..8fd3abb
--- /dev/null
+++ b/libs/__init__.py
@@ -0,0 +1,41 @@
+"""
+PyTaiko Libraries Package
+
+This package contains core libraries for the PyTaiko rhythm game.
+
+Modules:
+    animation: Animation system for game objects
+    audio: Audio engine for sound and music playback
+    background: Background rendering system
+    chara_2d: 2D character animation system
+    config: Configuration management
+    file_navigator: File and song navigation UI
+    global_data: Global data structures and enums
+    global_objects: Global UI objects (nameplate, timer, etc.)
+    screen: Base screen class for game states
+    song_hash: Song hashing and database management
+    texture: Texture loading and management
+    tja: TJA chart file parser
+    transition: Screen transition effects
+    utils: Utility functions and helpers
+    video: Video playback system
+"""
+
+__version__ = "1.1"
+__all__ = [
+    "animation",
+    "audio",
+    "background",
+    "chara_2d",
+    "config",
+    "file_navigator",
+    "global_data",
+    "global_objects",
+    "screen",
+    "song_hash",
+    "texture",
+    "tja",
+    "transition",
+    "utils",
+    "video",
+]
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 0fb983b..9a91024 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ dependencies = [
 
 [tool.pytest.ini_options]
 testpaths = ["test"]
+pythonpath = ["."]
 python_files = "test_*.py"
 python_classes = "Test*"
 python_functions = "test_*"