diff --git a/pyproject.toml b/pyproject.toml
index 58b8246..66ab60e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ docs = [
   "enum-tools>=0.11.0",
   "sphinx-rtd-theme>=2.0.0",
 ]
-testing = ["Flask>=3.0.2", "anyio[trio]>=4.3.0", "pytest-env>=1.1.3"]
+testing = ["Flask>=3.0.2", "anyio>=4.3.0", "pytest-env>=1.1.3"]
 dev = ["vshieldpy[testing]", "ruff"]
 
 [project.urls]
diff --git a/tests/conftest.py b/tests/conftest.py
index e9f3aa0..3302254 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -19,6 +19,9 @@ def test_server():
         },
     )
     thread.start()
+@pytest.fixture
+def anyio_backend():
+    return "asyncio"
 
 
 client = vshieldpy.Client()