diff --git a/tests/conformance/server.py b/tests/conformance/server.py
index d92b22dd7..158b0949e 100644
--- a/tests/conformance/server.py
+++ b/tests/conformance/server.py
@@ -12,7 +12,7 @@ from enum import Enum as PyEnum
 
 import mcp_types
 from mcp_types import EmbeddedResource, ImageContent, TextContent
-from pydantic import AnyUrl, BaseModel, Field
+from pydantic import BaseModel, Field
 
 from fastmcp import FastMCP
 from fastmcp.exceptions import ToolError
@@ -77,7 +77,7 @@ async def test_embedded_resource() -> list:
         EmbeddedResource(
             type="resource",
             resource=mcp_types.TextResourceContents(
-                uri=AnyUrl("test://embedded-resource"),
+                uri="test://embedded-resource",
                 mime_type="text/plain",
                 text="This is an embedded resource content.",
             ),
@@ -98,7 +98,7 @@ async def test_multiple_content_types() -> list:
         EmbeddedResource(
             type="resource",
             resource=mcp_types.TextResourceContents(
-                uri=AnyUrl("test://mixed-content-resource"),
+                uri="test://mixed-content-resource",
                 mime_type="application/json",
                 text='{"test":"data","value":123}',
             ),
@@ -348,7 +348,7 @@ async def test_prompt_with_embedded_resource(resourceUri: str) -> list:
             EmbeddedResource(
                 type="resource",
                 resource=mcp_types.TextResourceContents(
-                    uri=AnyUrl(resourceUri),
+                    uri=resourceUri,
                     mime_type="text/plain",
                     text=f"Content of resource {resourceUri}",
                 ),
diff --git a/tests/server/auth/oauth_proxy/test_config.py b/tests/server/auth/oauth_proxy/test_config.py
index c5e8e3078..a69330a3e 100644
--- a/tests/server/auth/oauth_proxy/test_config.py
+++ b/tests/server/auth/oauth_proxy/test_config.py
@@ -108,6 +108,7 @@ class TestResourceURLValidation:
             await proxy_with_resource_url.authorize(client, params)
 
         assert exc_info.value.error == "invalid_target"
+        assert exc_info.value.error_description is not None
         assert "Resource does not match" in exc_info.value.error_description
 
     async def test_authorize_accepts_matching_resource(self, proxy_with_resource_url):
diff --git a/tests/server/tasks/test_task_tools.py b/tests/server/tasks/test_task_tools.py
index 5656a4649..73ffc1310 100644
--- a/tests/server/tasks/test_task_tools.py
+++ b/tests/server/tasks/test_task_tools.py
@@ -83,7 +83,7 @@ async def test_task_tool_invalid_arguments_fail_before_task_state():
             self.methods: list[str] = []
 
         async def on_notification(self, message: mcp_types.ServerNotification) -> None:
-            self.methods.append(message.root.method)
+            self.methods.append(message.method)
 
     server = FastMCP("tool-task-invalid-args-server")
 
diff --git a/tests/test_mcp_config.py b/tests/test_mcp_config.py
index 16abfcb35..13b8b67c9 100644
--- a/tests/test_mcp_config.py
+++ b/tests/test_mcp_config.py
@@ -8,7 +8,6 @@ import sys
 import tempfile
 import time
 from collections.abc import AsyncGenerator
-from datetime import timedelta
 from pathlib import Path
 from typing import Any
 from unittest.mock import AsyncMock, patch
@@ -961,7 +960,8 @@ async def test_multi_server_timeout_propagation():
     )
 
     transport = MCPConfigTransport(config)
-    timeout = timedelta(seconds=42)
+    # SDK v2: read_timeout_seconds is a plain number of seconds, not a timedelta.
+    timeout = 42.0
 
     # Mock _create_proxy to avoid real stdio connections and verify timeout
     mock_create_proxy = AsyncMock(