diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 1f6392589..3f17f039c 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -225,11 +225,11 @@ jobs:
 
       - name: Run pytest (Chrome)
         run: |
-          pytest -vv --dist-dir=./pyodide-dist/ --runner=selenium --runtime=chrome tests-wasm
+          pytest -vv -o asyncio_default_fixture_loop_scope=function --dist-dir=./pyodide-dist/ --runner=selenium --runtime=chrome tests-wasm
 
       - name: Run pytest (Firefox)
         run: |
-          pytest -vv --dist-dir=./pyodide-dist/ --runner=selenium --runtime=firefox tests-wasm
+          pytest -vv -o asyncio_default_fixture_loop_scope=function --dist-dir=./pyodide-dist/ --runner=selenium --runtime=firefox tests-wasm
 
   gpu-build:
     name: GPU test with CUDA ${{ matrix.cuda-version }}
diff --git a/pyproject.toml b/pyproject.toml
index 41bc52f19..75f928ab3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -128,7 +128,7 @@ version-file = "src/uproot/version.py"
 source = "vcs"
 
 [tool.pytest.ini_options]
-addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config"]
+addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config", "-p", "no:anyio"]  # no test uses anyio's plugin, which breaks pytest >= 9.2 with anyio < 4.15
 filterwarnings = [
   "error",
   "default:module 'sre_.*' is deprecated:DeprecationWarning",