diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..5c432a0
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,13 @@
+"""
+Pytest configuration for tests.
+
+Configures anyio to only use asyncio backend (not trio).
+"""
+
+import pytest
+
+
+@pytest.fixture(scope="session")
+def anyio_backend():
+    """Override anyio backend to only use asyncio (not trio)."""
+    return "asyncio"
diff --git a/tests/test_unified_mcp_integration.py b/tests/test_unified_mcp_integration.py
index b9ba879..d8053c8 100644
--- a/tests/test_unified_mcp_integration.py
+++ b/tests/test_unified_mcp_integration.py
@@ -9,8 +9,12 @@ import sys
 import json
 import tempfile
 import asyncio
+import pytest
 from pathlib import Path
 
+# Configure pytest to only use asyncio backend (not trio)
+pytestmark = pytest.mark.anyio
+
 # Add skill_seeker_mcp to path
 sys.path.insert(0, str(Path(__file__).parent.parent / 'skill_seeker_mcp'))