Fix asyncio auto mode not marking static methods.

pytest_asyncio/plugin.py

@@ -320,6 +320,9 @@ def pytest_pycollect_makeitem(
     if not collector.funcnamefilter(name):
         return None
     _preprocess_async_fixtures(collector.config, _HOLDER)
+    if isinstance(obj, staticmethod):
+        # staticmethods need to be unwrapped.
+        obj = getattr(obj, "__func__", False)
     if (
         _is_coroutine(obj)
         or _is_hypothesis_test(obj)

tests/modes/test_auto_mode.py

@@ -87,3 +87,53 @@ async def test_a(self, fixture_a):
     )
     result = testdir.runpytest("--asyncio-mode=auto")
     result.assert_outcomes(passed=1)
+
+
+def test_auto_mode_static_method(testdir):
+    testdir.makepyfile(
+        dedent(
+            """\
+        import asyncio
+
+        pytest_plugins = 'pytest_asyncio'
+
+
+        class TestA:
+
+            @staticmethod
+            async def test_a():
+                await asyncio.sleep(0)
+        """
+        )
+    )
+    result = testdir.runpytest("--asyncio-mode=auto")
+    result.assert_outcomes(passed=1)
+
+
+def test_auto_mode_static_method_fixture(testdir):
+    testdir.makepyfile(
+        dedent(
+            """\
+        import asyncio
+        import pytest
+
+        pytest_plugins = 'pytest_asyncio'
+
+
+        class TestA:
+
+            @staticmethod
+            @pytest.fixture
+            async def fixture_a():
+                await asyncio.sleep(0)
+                return 1
+
+            @staticmethod
+            async def test_a(fixture_a):
+                await asyncio.sleep(0)
+                assert fixture_a == 1
+        """
+        )
+    )
+    result = testdir.runpytest("--asyncio-mode=auto")
+    result.assert_outcomes(passed=1)