diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..341e6ba
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,148 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+**/dist/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+tmp/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# intellij
+.idea/
+
+**/.env
+
+# Visual Studio Code
+.vscode/
+.history
+
+# for vscode dev container
+local_home/
+.devcontainer
+
+
+# Editor Related
+.idea/*
+*.iml
+
+# Profiler
+fil-result
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e5e5307
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+test:
+	python -m pytest -s -v --doctest-modules
diff --git a/ambientweather.py b/ambientweather.py
deleted file mode 100644
index 03eb41d..0000000
--- a/ambientweather.py
+++ /dev/null
@@ -1,57 +0,0 @@
-import requests
-from lxml import html
-from datetime import datetime
-
-
-TITLE = 'LiveData'  # HTML live data page title
-
-
-class SensorData(object):
-    """
-    time
-    temp
-    humidity
-    abs_press
-    rel_press
-    battery ('Normal')
-    """
-
-    def parse(self, live_data_html):
-        """
-        Extract sensor's data from html (LiveData.html from your ObserverIP)
-        Returns touple with (sensor1, sensor2 -> SensorData)
-        """
-
-        tree = html.fromstring(live_data_html)
-        title = tree.xpath('//title/text()')
-        if title[0] != TITLE:
-            raise Exception('Wrong html page. Good one have to have title {}'.format(TITLE))
-
-        inSensor = SensorData()
-        time_str = tree.xpath('//input[@name="CurrTime"]/@value')[0]
-        inSensor.time = datetime.strptime(time_str, '%H:%M %m/%d/%Y')
-        inSensor.temp = float(tree.xpath('//input[@name="inTemp"]/@value')[0])
-        inSensor.humidity = float(tree.xpath('//input[@name="inHumi"]/@value')[0])
-        inSensor.abs_press = float(tree.xpath('//input[@name="AbsPress"]/@value')[0])
-        inSensor.rel_press = float(tree.xpath('//input[@name="RelPress"]/@value')[0])
-        inSensor.battery = tree.xpath('//input[@name="inBattSta"]/@value')[0]
-
-        outSensor = SensorData()
-        outSensor.time = inSensor.time
-        outSensor.temp = float(tree.xpath('//input[@name="outTemp"]/@value')[0])
-        outSensor.humidity = float(tree.xpath('//input[@name="outHumi"]/@value')[0])
-        outSensor.abs_press = inSensor.abs_press
-        outSensor.rel_press = inSensor.rel_press
-        outSensor.battery = tree.xpath('//input[@name="outBattSta2"]/@value')[0]
-
-        return inSensor, outSensor
-
-    def get(self, url):
-        """
-        Load ObserverIP live data page from the URL and parse it
-
-        Returns touple with (sensor1, sensor2 -> SensorData)
-        """
-
-        page = requests.get(url).content
-        return self.parse(page)
diff --git a/ambientweather_test.py b/ambientweather_test.py
deleted file mode 100644
index 07fb824..0000000
--- a/ambientweather_test.py
+++ /dev/null
@@ -1,42 +0,0 @@
-from ambientweather import SensorData
-from datetime import datetime
-
-
-def test():
-    with open('LiveData.html', 'r') as f:
-        page = f.read()
-
-    sensor_data = SensorData()
-    inSensor, outSensor = sensor_data.parse(page)
-
-    print(f'Time: {inSensor.time}\n')
-    print('''Indoor\n{delimiter}\nTemperature: {temp}\nHumidity: {humidity}
-Absolute preassure: {abs_press}\nRelative preassure: {rel_press}\nBattery status: {battery}\n'''.format(
-        delimiter='='*20,
-        temp=inSensor.temp,
-        humidity=inSensor.humidity,
-        abs_press=inSensor.abs_press,
-        rel_press=inSensor.rel_press,
-        battery=inSensor.battery
-    ))
-    print('''Outdoor\n{delimiter}\nTemperature: {temp}\nHumidity: {humidity}
-Battery status: {battery}\n'''.format(
-        delimiter='='*20,
-        temp=inSensor.temp,
-        humidity=inSensor.humidity,
-        battery=inSensor.battery
-    ))
-
-    assert inSensor.time == datetime.strptime('2017/10/06 13:55:00', '%Y/%m/%d %H:%M:%S')
-    assert inSensor.temp == 21.9
-    assert inSensor.humidity == 50.0
-    assert inSensor.abs_press == 744.29
-    assert inSensor.rel_press == 728.31
-    assert inSensor.battery == 'Normal'
-    assert outSensor.temp == 10.1
-    assert outSensor.humidity == 71.0
-    assert outSensor.battery == 'Normal'
-
-
-
-
diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..9398455
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,13 @@
+"""
+Tests run from the project root folder.
+But the python code expects to run inside server folder.
+
+So for tests we add server folder to sys.path.
+
+This file is loaded first by py.test therefore we change sys.path for all other python files.
+"""
+import os.path
+import sys
+
+
+sys.path.append(os.path.join(os.path.dirname(__file__), 'src'))
diff --git a/src/ambientweather.py b/src/ambientweather.py
new file mode 100644
index 0000000..b42e9c1
--- /dev/null
+++ b/src/ambientweather.py
@@ -0,0 +1,57 @@
+import requests
+from lxml import html
+from datetime import datetime
+
+
+TITLE = 'LiveData'  # HTML live data page title
+
+
+class SensorData(object):
+    """
+    time
+    temp
+    humidity
+    abs_press
+    rel_press
+    battery ('Normal')
+    """
+
+    def parse(self, live_data_html):
+        """
+        Extract sensor's data from html (LiveData.html from your ObserverIP)
+        Returns touple with (sensor1, sensor2 -> SensorData)
+        """
+
+        tree = html.fromstring(live_data_html)
+        title = tree.xpath('//title/text()')
+        if title[0] != TITLE:
+            raise ValueError(f'Wrong html page. Good one have to have title {TITLE}')
+
+        in_sensor = SensorData()
+        time_str = tree.xpath('//input[@name="CurrTime"]/@value')[0]
+        in_sensor.time = datetime.strptime(time_str, '%H:%M %m/%d/%Y')
+        in_sensor.temp = float(tree.xpath('//input[@name="inTemp"]/@value')[0])
+        in_sensor.humidity = float(tree.xpath('//input[@name="inHumi"]/@value')[0])
+        in_sensor.abs_press = float(tree.xpath('//input[@name="AbsPress"]/@value')[0])
+        in_sensor.rel_press = float(tree.xpath('//input[@name="RelPress"]/@value')[0])
+        in_sensor.battery = tree.xpath('//input[@name="inBattSta"]/@value')[0]
+
+        out_sensor = SensorData()
+        out_sensor.time = in_sensor.time
+        out_sensor.temp = float(tree.xpath('//input[@name="outTemp"]/@value')[0])
+        out_sensor.humidity = float(tree.xpath('//input[@name="outHumi"]/@value')[0])
+        out_sensor.abs_press = in_sensor.abs_press
+        out_sensor.rel_press = in_sensor.rel_press
+        out_sensor.battery = tree.xpath('//input[@name="outBattSta2"]/@value')[0]
+
+        return in_sensor, out_sensor
+
+    def get(self, url):
+        """
+        Load ObserverIP live data page from the URL and parse it
+
+        Returns touple with (sensor1, sensor2 -> SensorData)
+        """
+
+        page = requests.get(url).content
+        return self.parse(page)
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..4a23385
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,24 @@
+from pathlib import Path
+import pytest
+
+
+def _get_repo_root_dir() -> str:
+    """
+    :return: path to the project folder.
+    `tests/` should be in the same folder and this file should be in the root of `tests/`.
+    """
+    return str(Path(__file__).parent.parent)
+
+
+ROOT_DIR = _get_repo_root_dir()
+RESOURCES = Path(f"{ROOT_DIR}/tests/resources")
+
+@pytest.fixture(
+    scope="function",
+    params=[
+        "LiveData.html",
+    ],
+)
+def ambientweather_data(request) -> str:
+    with (RESOURCES / request.param).open("r", encoding="utf8") as data:
+        return data.read()
diff --git a/LiveData.html b/tests/resources/LiveData.html
similarity index 100%
rename from LiveData.html
rename to tests/resources/LiveData.html
diff --git a/tests/test_ambientweather_data.py b/tests/test_ambientweather_data.py
new file mode 100644
index 0000000..7b51aa7
--- /dev/null
+++ b/tests/test_ambientweather_data.py
@@ -0,0 +1,39 @@
+from ambientweather import SensorData
+from datetime import datetime
+
+
+def test_ambientweather_data(ambientweather_data: str):
+    sensor_data = SensorData()
+    in_sensor, out_sensor = sensor_data.parse(ambientweather_data)
+
+    print(f'Time: {in_sensor.time}\n')
+    print('''Indoor\n{delimiter}\nTemperature: {temp}\nHumidity: {humidity}
+Absolute preassure: {abs_press}\nRelative preassure: {rel_press}\nBattery status: {battery}\n'''.format(
+        delimiter='='*20,
+        temp=in_sensor.temp,
+        humidity=in_sensor.humidity,
+        abs_press=in_sensor.abs_press,
+        rel_press=in_sensor.rel_press,
+        battery=in_sensor.battery
+    ))
+    print('''Outdoor\n{delimiter}\nTemperature: {temp}\nHumidity: {humidity}
+Battery status: {battery}\n'''.format(
+        delimiter='='*20,
+        temp=in_sensor.temp,
+        humidity=in_sensor.humidity,
+        battery=in_sensor.battery
+    ))
+
+    assert in_sensor.time == datetime.strptime('2017/10/06 13:55:00', '%Y/%m/%d %H:%M:%S')
+    assert in_sensor.temp == 21.9
+    assert in_sensor.humidity == 50.0
+    assert in_sensor.abs_press == 744.29
+    assert in_sensor.rel_press == 728.31
+    assert in_sensor.battery == 'Normal'
+    assert out_sensor.temp == 10.1
+    assert out_sensor.humidity == 71.0
+    assert out_sensor.battery == 'Normal'
+
+
+
+