diff --git a/tests/python/test_config.py b/tests/python/test_config.py
index 493b0f1..c919c6f 100644
--- a/tests/python/test_config.py
+++ b/tests/python/test_config.py
@@ -1,10 +1,42 @@
-import unittest
+import pytest
+from LogarithmPlotter.util import config
+from tempfile import TemporaryDirectory
+from os.path import join
 
 
-class MyTestCase(unittest.TestCase):
-    def test_something(self):
-        self.assertEqual(True, False)  # add assertion here
+@pytest.fixture()
+def resource():
+    directory = TemporaryDirectory()
+    config.CONFIG_FILE = join(directory.name, "config.json")
+    config.init()
+    yield config.CONFIG_FILE
+    directory.cleanup()
 
 
-if __name__ == '__main__':
-    unittest.main()
+class TestConfig:
+
+    def test_init(self, resource):
+        assert config.current_config == config.DEFAULT_SETTINGS
+
+    def test_get(self, resource):
+        assert config.getSetting("expression_editor.autoclose") == True
+        with pytest.raises(config.UnknownNamespaceError):
+            config.getSetting("unknown_setting")
+
+    def test_set(self, resource):
+        assert config.setSetting("expression_editor.autoclose", False) is None
+        assert config.getSetting("expression_editor.autoclose") == False # Ensure set is working.
+        with pytest.raises(config.UnknownNamespaceError):
+            config.setSetting("unknown_dict.unknown_setting", False)
+
+    def test_reinit(self, resource):
+        default_value = config.getSetting("expression_editor.autoclose")
+        config.setSetting("expression_editor.autoclose", not default_value)
+        config.init()
+        assert config.getSetting("expression_editor.autoclose") != default_value # Ensure setting has been reset.
+
+    def test_save(self, resource):
+        config.setSetting("expression_editor.autoclose", False)
+        config.save(resource)
+        config.init()
+        assert config.getSetting("expression_editor.autoclose") == False # Ensure setting has been saved.
diff --git a/tests/python/test_helper.py b/tests/python/test_helper.py
index e69de29..e57ec61 100644
--- a/tests/python/test_helper.py
+++ b/tests/python/test_helper.py
@@ -0,0 +1,13 @@
+import pytest
+from os.path import join
+from tempfile import TemporaryDirectory
+from LogarithmPlotter.util import config
+
+
+@pytest.fixture()
+def resource():
+    directory = TemporaryDirectory()
+    config.CONFIG_PATH = join(directory.name, "config.json")
+    tmpfile = join(directory.name, 'graph.png')
+    yield tmpfile
+    directory.cleanup()
\ No newline at end of file
diff --git a/tests/python/test_pyjs.py b/tests/python/test_pyjs.py
index e69de29..7765f30 100644
--- a/tests/python/test_pyjs.py
+++ b/tests/python/test_pyjs.py
@@ -0,0 +1,34 @@
+
+import pytest
+from PySide6.QtQml import QJSEngine, QJSValue
+from PySide6.QtWidgets import QApplication
+
+from LogarithmPlotter.util.js import PyJSValue, InvalidAttributeValueException
+
+app = QApplication()
+engine = QJSEngine()
+obj = PyJSValue(engine.globalObject())
+
+class TestPyJS:
+    def test_set(self):
+        obj.num1 = 2
+        obj.num2 = QJSValue(2)
+        with pytest.raises(InvalidAttributeValueException):
+            obj.num3 = object()
+
+    def test_eq(self):
+        obj.num = QJSValue(2)
+        assert obj.num == 2
+        assert obj.num == QJSValue(2)
+        assert obj.num != object()
+
+    def test_function(self):
+        function = PyJSValue(engine.evaluate("(function(argument) {return argument*2})"))
+        assert function(3) == 6
+        assert function(10) == 20
+        function2 = PyJSValue(engine.evaluate("(function(argument) {return argument+3})"), obj.qjs_value)
+        assert function2(3) == 6
+        assert function2(10) == 13
+        function3 = PyJSValue(engine.evaluate("2+2"))
+        with pytest.raises(InvalidAttributeValueException):
+            function3()