diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
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diff --git a/.gitignore b/.gitignore
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diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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diff --git a/LICENSE b/LICENSE
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diff --git a/README.md b/README.md
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diff --git a/docs/reference.md b/docs/reference.md
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diff --git a/pytest_operator/__init__.py b/pytest_operator/__init__.py
old mode 100644
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diff --git a/pytest_operator/plugin.py b/pytest_operator/plugin.py
old mode 100644
new mode 100755
index 09ff21d..df6a526
--- a/pytest_operator/plugin.py
+++ b/pytest_operator/plugin.py
@@ -149,6 +149,8 @@ def tmp_path_factory(request):
         given_basetemp=Path(os.environ["TOX_ENV_DIR"]) / "tmp" / "pytest",
         trace=request.config.trace.get("tmpdir"),
         _ispytest=True,
+        retention_count=1,
+        retention_policy="failed"
     )
 
 
@@ -167,25 +169,13 @@ def check_deps(*deps):
         )
 
 
-@pytest.fixture(scope="module")
-def event_loop():
-    """Create an instance of the default event loop for each test module."""
-    loop = asyncio.get_event_loop_policy().new_event_loop()
-    yield loop
-    loop.close()
-
-
-# Plugin load order can't be set, replace asyncio directly
-pytest_asyncio.plugin.event_loop = event_loop
-
-
 def pytest_collection_modifyitems(session, config, items):
     """Automatically apply the "asyncio" marker to any async test items."""
     for item in items:
         is_async = inspect.iscoroutinefunction(getattr(item, "function", None))
         has_marker = item.get_closest_marker("asyncio")
         if is_async and not has_marker:
-            item.add_marker("asyncio")
+            item.add_marker(pytest.mark.asyncio(scope="module"))
 
 
 @pytest.hookimpl(tryfirst=True, hookwrapper=True)
diff --git a/pytest_operator/shims.py b/pytest_operator/shims.py
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diff --git a/setup.py b/setup.py
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diff --git a/tests/data/bundle.yaml b/tests/data/bundle.yaml
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diff --git a/tests/data/charms/operator-framework/.flake8 b/tests/data/charms/operator-framework/.flake8
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diff --git a/tests/data/charms/operator-framework/.jujuignore b/tests/data/charms/operator-framework/.jujuignore
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diff --git a/tests/data/charms/operator-framework/charmcraft.yaml b/tests/data/charms/operator-framework/charmcraft.yaml
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diff --git a/tests/data/charms/operator-framework/config.yaml b/tests/data/charms/operator-framework/config.yaml
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diff --git a/tests/data/charms/operator-framework/metadata.yaml b/tests/data/charms/operator-framework/metadata.yaml
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diff --git a/tests/data/charms/operator-framework/requirements.txt b/tests/data/charms/operator-framework/requirements.txt
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diff --git a/tests/data/charms/reactive-framework/config.yaml b/tests/data/charms/reactive-framework/config.yaml
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diff --git a/tests/data/charms/reactive-framework/layer.yaml b/tests/data/charms/reactive-framework/layer.yaml
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diff --git a/tests/data/charms/reactive-framework/metadata.yaml b/tests/data/charms/reactive-framework/metadata.yaml
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diff --git a/tests/data/charms/reactive-framework/reactive/reactive_framework.py b/tests/data/charms/reactive-framework/reactive/reactive_framework.py
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diff --git a/tests/data/charms/resourced-charm/metadata.yaml b/tests/data/charms/resourced-charm/metadata.yaml
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diff --git a/tests/data/etcd_ch_api_response.json b/tests/data/etcd_ch_api_response.json
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diff --git a/tests/data/model-config.yaml b/tests/data/model-config.yaml
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diff --git a/tests/data/test_lib/setup.py b/tests/data/test_lib/setup.py
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diff --git a/tests/integration/test_pytest_operator.py b/tests/integration/test_pytest_operator.py
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diff --git a/tests/unit/conftest.py b/tests/unit/conftest.py
old mode 100644
new mode 100755
index c6481d5..38712a1
--- a/tests/unit/conftest.py
+++ b/tests/unit/conftest.py
@@ -1 +1,9 @@
+import pytest
+
 pytest_plugins = ["pytester"]
+
+
+@pytest.fixture(autouse=True)
+@pytest.mark.asyncio_event_loop
+def foo():
+    pass
diff --git a/tests/unit/test_pytest_operator.py b/tests/unit/test_pytest_operator.py
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diff --git a/tox.ini b/tox.ini
old mode 100644
new mode 100755
index ba0012f..af8a297
--- a/tox.ini
+++ b/tox.ini
@@ -41,7 +41,7 @@ commands = pytest \
 [testenv:integration]
 passenv = HOME
 commands =
-    pytest --tb=native --show-capture=no --log-cli-level=INFO\
+    pytest --tb=native --show-capture=no --log-cli-level=INFO \
            -vs --ignore=tests/data --ignore=tests/unit \
            --model-config tests/data/model-config.yaml {posargs:tests/integration}
 deps =