diff --git a/backend/tests/test_oidc_client_v2.py b/backend/tests/test_oidc_client_v2.py
index 6d7beed..b130319 100644
--- a/backend/tests/test_oidc_client_v2.py
+++ b/backend/tests/test_oidc_client_v2.py
@@ -1,6 +1,6 @@
 import pytest
 from unittest.mock import MagicMock, patch
-from ea_chatbot.auth import OIDCClient
+from ea_chatbot.auth import OIDCClient, get_user_auth_type, AuthType
 
 @pytest.fixture
 def oidc_config():
@@ -14,12 +14,69 @@ def oidc_config():
 @pytest.fixture
 def mock_metadata():
     return {
+        "issuer": "https://example.com",
         "authorization_endpoint": "https://example.com/auth",
         "token_endpoint": "https://example.com/token",
         "userinfo_endpoint": "https://example.com/userinfo",
         "jwks_uri": "https://example.com/jwks"
     }
 
+def test_get_user_auth_type():
+    history_manager = MagicMock()
+    
+    # Case: New user
+    history_manager.get_user.return_value = None
+    assert get_user_auth_type("new@test.com", history_manager) == AuthType.NEW
+    
+    # Case: Local user (has password)
+    user = MagicMock()
+    user.password_hash = "hashed_pass"
+    history_manager.get_user.return_value = user
+    assert get_user_auth_type("local@test.com", history_manager) == AuthType.LOCAL
+    
+    # Case: OIDC user (no password)
+    user.password_hash = None
+    assert get_user_auth_type("oidc@test.com", history_manager) == AuthType.OIDC
+
+def test_oidc_fetch_jwks(oidc_config, mock_metadata):
+    client = OIDCClient(**oidc_config)
+    client.metadata = mock_metadata
+    
+    with patch("requests.get") as mock_get:
+        mock_response = MagicMock()
+        mock_response.json.return_value = {"keys": []}
+        mock_get.return_value = mock_response
+        
+        jwks = client.fetch_jwks()
+        assert jwks == {"keys": []}
+        mock_get.assert_called_once_with(mock_metadata["jwks_uri"])
+        
+        # Cache check
+        client.fetch_jwks()
+        assert mock_get.call_count == 1
+
+def test_oidc_get_login_url_legacy(oidc_config, mock_metadata):
+    client = OIDCClient(**oidc_config)
+    client.metadata = mock_metadata
+    
+    with patch.object(client.oauth_session, "create_authorization_url") as mock_create:
+        mock_create.return_value = ("https://url", "state")
+        url = client.get_login_url()
+        assert url == "https://url"
+
+def test_oidc_get_user_info(oidc_config, mock_metadata):
+    client = OIDCClient(**oidc_config)
+    client.metadata = mock_metadata
+    
+    with patch.object(client.oauth_session, "get") as mock_get:
+        mock_resp = MagicMock()
+        mock_resp.json.return_value = {"email": "test@test.com"}
+        mock_get.return_value = mock_resp
+        
+        info = client.get_user_info({"access_token": "abc"})
+        assert info["email"] == "test@test.com"
+        assert client.oauth_session.token == {"access_token": "abc"}
+
 def test_oidc_generate_pkce(oidc_config):
     client = OIDCClient(**oidc_config)
     code_verifier, code_challenge = client.generate_pkce()