diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..6deafc2
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 120
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..5e54ff5
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ["3.9", "3.10", "3.11"]
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e .[dev]
+    - name: Lint with flake8
+      run: |
+        pip install flake8
+        flake8 examples tapsdk tests
+    - name: Run tests
+      run: pytest -v
diff --git a/Readme.md b/Readme.md
index 8160d54..d36fc30 100644
--- a/Readme.md
+++ b/Readme.md
@@ -241,6 +241,21 @@ The dynamic range of the sensors is determined with the ```set_input_mode``` met
 
 You can find some examples in the [examples folder](examples).
 
+### Testing
+
+To run the tests, first install the development dependencies:
+
+```bash
+pip install .[dev]
+```
+
+Then run the tests using pytest:
+
+```bash
+pytest
+```
+
+
 ### Known Issues
 An up-to-date list of known issues is available [here](History.md).
 
diff --git a/examples/basic.py b/examples/basic.py
index 9c6183d..4301472 100644
--- a/examples/basic.py
+++ b/examples/basic.py
@@ -53,7 +53,7 @@ async def run(loop):
     print("Force Mouse Mode for 5 seconds")
     await client.set_input_type(InputType.MOUSE)
     await asyncio.sleep(5)
-    
+
     print("Force keyboard Mode for 5 seconds")
     await client.set_input_type(InputType.KEYBOARD)
     await asyncio.sleep(5)
diff --git a/requirements.txt b/requirements.txt
index 40d8264..845a550 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 bleak
-setuptools
\ No newline at end of file
+setuptools
diff --git a/setup.py b/setup.py
index 98d9dd0..3ed784b 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 REQUIRED = [
     # linux reqs
     'bleak==0.6.4;platform_system=="Linux"',
-     # macOS reqs
+    # macOS reqs
     'bleak==0.12.1;platform_system=="Darwin"',
     # Windows reqs
     'pythonnet;platform_system=="Windows"'
@@ -82,13 +82,13 @@ def run(self):
     author_email=EMAIL,
     url=URL,
     packages=find_packages(exclude=("tests", "examples", "docs")),
-    # package_data={"tapsdk.backends.dotnet": ["*.dll"]},
     install_requires=REQUIRED,
-    # test_suite="tests",
-    # tests_require=TEST_REQUIRED,
     include_package_data=True,
     license="MIT",
-    python_requires='>=3.7'
+    python_requires='>=3.9',
+    extras_require={
+        "dev": ["pytest", "flake8"]
+    },
     # classifiers=[
     #     # Trove classifiers
     #     # Full list: https://pypi.python.org/pypi?%3Aaction=list_classifiers
diff --git a/tapsdk/tap.py b/tapsdk/tap.py
index 0c2297a..c1d681c 100644
--- a/tapsdk/tap.py
+++ b/tapsdk/tap.py
@@ -232,7 +232,6 @@ async def _refresh_input_mode(self):
     async def _write_input_mode(self, value):
         await self.client.write_gatt_char(tap_mode_characteristic, value)
 
-
     async def run(self):
         stop_event = asyncio.Event()
         devices = []
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..ba16bdc
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,28 @@
+import sys
+import types
+
+
+def pytest_configure(config):
+    bleak_stub = types.ModuleType("bleak")
+
+    class Dummy:
+        def __init__(self, *args, **kwargs):
+            pass
+
+    bleak_stub.BleakClient = Dummy
+    bleak_stub.BleakScanner = Dummy
+    bleak_stub._logger = types.SimpleNamespace(
+        debug=lambda *a, **k: None,
+        info=lambda *a, **k: None,
+        error=lambda *a, **k: None,
+    )
+    sys.modules.setdefault("bleak", bleak_stub)
+
+    core_mod = types.ModuleType("bleak.backends.corebluetooth.CentralManagerDelegate")
+    core_mod.CBUUID = type("CBUUID", (), {"UUIDWithString_": staticmethod(lambda x: x)})
+    core_mod.CentralManagerDelegate = type(
+        "CentralManagerDelegate",
+        (),
+        {"alloc": classmethod(lambda cls: type("Obj", (), {"init": lambda self: None})())},
+    )
+    sys.modules.setdefault("bleak.backends.corebluetooth.CentralManagerDelegate", core_mod)
diff --git a/tests/test_cross_platform.py b/tests/test_cross_platform.py
new file mode 100644
index 0000000..b91ed7b
--- /dev/null
+++ b/tests/test_cross_platform.py
@@ -0,0 +1,53 @@
+import importlib
+import sys
+import types
+from unittest.mock import patch
+
+
+def _make_bleak_stub():
+    bleak_stub = types.ModuleType("bleak")
+
+    class Dummy:
+        def __init__(self, *args, **kwargs):
+            pass
+
+    bleak_stub.BleakClient = Dummy
+    bleak_stub.BleakScanner = Dummy
+    bleak_stub._logger = types.SimpleNamespace(
+        debug=lambda *a, **k: None,
+        info=lambda *a, **k: None,
+        error=lambda *a, **k: None,
+    )
+    core_mod = types.ModuleType(
+        "bleak.backends.corebluetooth.CentralManagerDelegate"
+    )
+    core_mod.CBUUID = type("CBUUID", (), {"UUIDWithString_": staticmethod(lambda x: x)})
+    core_mod.CentralManagerDelegate = type(
+        "CentralManagerDelegate",
+        (),
+        {"alloc": classmethod(lambda cls: type("Obj", (), {"init": lambda self: None})())},
+    )
+    return bleak_stub, core_mod
+
+
+def _load_tap(platform_name: str):
+    bleak_stub, core_stub = _make_bleak_stub()
+    with patch.dict(
+        sys.modules,
+        {
+            "bleak": bleak_stub,
+            "bleak.backends.corebluetooth.CentralManagerDelegate": core_stub,
+        },
+    ):
+        with patch("platform.system", return_value=platform_name):
+            if "tapsdk.tap" in sys.modules:
+                module = importlib.reload(sys.modules["tapsdk.tap"])
+            else:
+                module = importlib.import_module("tapsdk.tap")
+    return module
+
+
+def test_tapclient_defined_for_all_platforms():
+    for name in ["Linux", "Windows", "Darwin"]:
+        module = _load_tap(name)
+        assert hasattr(module, "TapClient")
diff --git a/tests/test_inputmodes.py b/tests/test_inputmodes.py
new file mode 100644
index 0000000..1bedc78
--- /dev/null
+++ b/tests/test_inputmodes.py
@@ -0,0 +1,17 @@
+from tapsdk.inputmodes import TapInputMode, input_type_command
+from tapsdk.enumerations import InputType
+
+
+def test_input_mode_basic():
+    assert TapInputMode("text").get_command() == bytearray([0x3, 0xc, 0x0, 0x0])
+    assert TapInputMode("controller").get_command() == bytearray([0x3, 0xc, 0x0, 0x1])
+    assert TapInputMode("controller_text").get_command() == bytearray([0x3, 0xc, 0x0, 0x3])
+
+
+def test_input_mode_raw_with_sensitivity():
+    mode = TapInputMode("raw", sensitivity=[1, 2, 3])
+    assert mode.get_command() == bytearray([0x3, 0xc, 0x0, 0xa, 1, 2, 3])
+
+
+def test_input_type_command():
+    assert input_type_command(InputType.MOUSE) == bytearray([0x3, 0xd, 0x0, InputType.MOUSE.value])
diff --git a/tests/test_parsers.py b/tests/test_parsers.py
new file mode 100644
index 0000000..4a189c6
--- /dev/null
+++ b/tests/test_parsers.py
@@ -0,0 +1,55 @@
+import tapsdk.parsers as parsers
+
+
+def test_mouse_data_msg():
+    data = bytearray([0, 1, 0, 2, 0, 0, 0, 0, 0, 1])
+    assert parsers.mouse_data_msg(data) == (1, 2, True)
+
+
+def test_tap_data_msg():
+    data = bytearray([5])
+    assert parsers.tap_data_msg(data) == [5]
+
+
+def test_raw_data_msg():
+    # 1. packet with one imu message
+    # IMU message: type=0, timestamp=123, 6 samples (12 bytes)
+    ts = 123
+    imu_ts = ts  # type bit is 0, so ts stays 123
+    imu_bytes = imu_ts.to_bytes(4, 'little', signed=False)
+    imu_payload = b''
+    imu_samples = [100, -100, 200, -200, 300, -300]
+    for v in imu_samples:
+        imu_payload += v.to_bytes(2, 'little', signed=True)
+    imu_packet = bytearray(imu_bytes + imu_payload)
+    result = parsers.raw_data_msg(imu_packet)
+    assert result == [{
+        'type': 'imu',
+        'ts': 123,
+        'payload': imu_samples
+    }]
+
+    # 2. packet with one accl message
+    # Accl message: type=1, timestamp=456, 15 samples (30 bytes)
+    accl_ts = (1 << 31) + 456  # set MSB for accl
+    accl_bytes = accl_ts.to_bytes(4, 'little', signed=False)
+    accl_samples = list(range(1, 16))
+    accl_payload = b''
+    for v in accl_samples:
+        accl_payload += v.to_bytes(2, 'little', signed=True)
+    accl_packet = bytearray(accl_bytes + accl_payload)
+    result = parsers.raw_data_msg(accl_packet)
+    assert result == [{
+        'type': 'accl',
+        'ts': 456,
+        'payload': accl_samples
+    }]
+
+    # 3. packet with imu message and accl message
+    # imu first, then accl
+    combo_packet = bytearray(imu_bytes + imu_payload + accl_bytes + accl_payload)
+    result = parsers.raw_data_msg(combo_packet)
+    assert result == [
+        {'type': 'imu', 'ts': 123, 'payload': imu_samples},
+        {'type': 'accl', 'ts': 456, 'payload': accl_samples}
+    ]