diff --git a/tests/agrirouter/api/__init__.py b/tests/agrirouter/api/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/agrirouter/api/test_enums.py b/tests/agrirouter/api/test_enums.py
new file mode 100644
index 0000000..a19057a
--- /dev/null
+++ b/tests/agrirouter/api/test_enums.py
@@ -0,0 +1,25 @@
+import unittest
+
+import pytest
+
+from src.agrirouter.api.enums import BaseEnum
+
+
+class TestEnum(BaseEnum):
+    VALUE1 = 'value1'
+    VALUE2 = 'value2'
+
+
+class TestBaseEnum(unittest.TestCase):
+
+    @pytest.fixture(autouse=True)
+    def setup_class(self):
+        self.enum = TestEnum
+
+    def test_choices(self):
+        expected_choices = [('value1', 'VALUE1'), ('value2', 'VALUE2')]
+        assert self.enum.choices() == expected_choices
+
+    def test_values_list(self):
+        expected_values_list = ['value1', 'value2']
+        assert self.enum.values_list() == expected_values_list
diff --git a/tests/agrirouter/api/test_environments.py b/tests/agrirouter/api/test_environments.py
new file mode 100644
index 0000000..dca9142
--- /dev/null
+++ b/tests/agrirouter/api/test_environments.py
@@ -0,0 +1,57 @@
+import unittest
+
+from src.agrirouter.api import environments
+
+
+class TestEnvironments(unittest.TestCase):
+    def test_get_base_url(self):
+        env = environments.BaseEnvironment()
+        assert env.get_base_url() == ""
+
+    def test_get_api_prefix(self):
+        env = environments.BaseEnvironment()
+        assert env.get_api_prefix() == ""
+
+    def test_get_registration_service_url(self):
+        env = environments.BaseEnvironment()
+        assert env.get_registration_service_url() == ""
+
+    def test_get_onboard_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "/registration/onboard"
+        assert env.get_onboard_url() == expected_url
+
+    def test_get_secured_onboard_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "/registration/onboard/request"
+        assert env.get_secured_onboard_url() == expected_url
+
+    def test_get_verify_onboard_request_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "/registration/onboard/verify"
+        assert env.get_verify_onboard_request_url() == expected_url
+
+    def test_get_revoke_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "/registration/onboard/revoke"
+        assert env.get_revoke_url() == expected_url
+
+    def test_get_agrirouter_login_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "/app"
+        assert env.get_agrirouter_login_url() == expected_url
+
+    def test_get_secured_onboarding_authorization_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "/application/test_app/authorize?response_type=test_response_type&state=test_state&redirect_uri=test_redirect_uri"  # noqa
+        assert env.get_secured_onboarding_authorization_url("test_app", "test_response_type", "test_state",  # noqa
+                                                            "test_redirect_uri") == expected_url
+
+    def test_get_mqtt_server_url(self):
+        env = environments.BaseEnvironment()
+        expected_url = "ssl://test_host:test_port"
+        assert env.get_mqtt_server_url("test_host", "test_port") == expected_url
+
+    def test_get_env_public_key(self):
+        env = environments.BaseEnvironment()
+        assert env.get_env_public_key() is None
diff --git a/tests/agrirouter/auth/__init__.py b/tests/agrirouter/auth/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/agrirouter/auth/test_auth.py b/tests/agrirouter/auth/test_auth.py
new file mode 100644
index 0000000..fffc48a
--- /dev/null
+++ b/tests/agrirouter/auth/test_auth.py
@@ -0,0 +1,54 @@
+import unittest
+
+from agrirouter.api.enums import ResponseTypes
+from agrirouter.api.environments import BaseEnvironment
+from agrirouter.auth.auth import Authorization
+from agrirouter.auth.parameters import AuthUrlParameter
+
+
+class MockEnvironment(BaseEnvironment):
+    def get_secured_onboarding_authorization_url(self, **kwargs):
+        return 'https://secured.url'
+
+    def get_env_public_key(self):
+        return 'public_key_env'
+
+
+class TestAuthorization(unittest.TestCase):
+
+    def test_authorization_initialization(self):
+        authorization = Authorization(MockEnvironment(), 'public_key', 'private_key')
+        assert authorization._public_key == 'public_key'
+        assert authorization._private_key == 'private_key'
+
+    def test_get_auth_request_url(self):
+        authorization = Authorization(MockEnvironment(), 'public_key', 'private_key')
+        parameters = AuthUrlParameter(application_id='app_id', response_type=ResponseTypes.ONBOARD.value,
+                                      state='state',
+                                      redirect_uri='redirect_uri')
+        auth_url = authorization.get_auth_request_url(parameters=parameters)
+        assert auth_url == 'https://secured.url'
+
+    def test_extract_auth_response(self):
+        authorization = Authorization(MockEnvironment(), 'public_key', 'private_key')
+        auth_response = authorization.extract_auth_response(
+            'https://example.com/?state=state&token=token&signature=signature')
+        assert auth_response.state == 'state'
+        assert auth_response.token == 'token'
+        assert auth_response.signature == 'signature'
+        assert auth_response.error is None
+
+    def test_extract_auth_response_and_error(self):
+        authorization = Authorization(MockEnvironment(), 'public_key', 'private_key')
+        auth_response = authorization.extract_auth_response(
+            'https://example.com/?state=state&token=token&signature=signature&error=error')
+        assert auth_response.state == 'state'
+        assert auth_response.token == 'token'
+        assert auth_response.signature == 'signature'
+        assert auth_response.error == 'error'
+
+    def test_extract_query_params(self):
+        query_str = "param1=value1&param2=value2&param3=value3"
+        extracted_params = Authorization._extract_query_params(query_str)
+        expected_params = {'param1': 'value1', 'param2': 'value2', 'param3': 'value3'}
+        assert extracted_params == expected_params