Our build framework sets PYTEST_PLUGINS to contain 'asyncio' and so the
	pytest_plugins = 'pytest_asyncio'
line tries to load the plugin 2nd time.  This emits additional warning and so
all tests that check the expected number of warnings fails here.

--- pytest_asyncio-0.25.0/tests/hypothesis/test_base.py.orig
+++ pytest_asyncio-0.25.0/tests/hypothesis/test_base.py
@@ -45,7 +45,7 @@
     assert y in (1, 2)
 
 
-def test_can_use_explicit_event_loop_fixture(pytester: Pytester):
+def test_can_use_explicit_event_loop_fixture(pytester: Pytester, monkeypatch):
     pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = module")
     pytester.makepyfile(
         dedent(
@@ -55,8 +55,6 @@
             from hypothesis import given
             import hypothesis.strategies as st
 
-            pytest_plugins = 'pytest_asyncio'
-
             @pytest.fixture(scope="module")
             def event_loop():
                 loop = asyncio.get_event_loop_policy().new_event_loop()
@@ -72,6 +70,7 @@
             """
         )
     )
+    monkeypatch.setenv("PYTEST_PLUGINS", "asyncio")
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
     result.assert_outcomes(passed=1, warnings=2)
     result.stdout.fnmatch_lines(
--- pytest_asyncio-0.25.0/tests/test_event_loop_fixture_finalizer.py.orig
+++ pytest_asyncio-0.25.0/tests/test_event_loop_fixture_finalizer.py
@@ -98,7 +98,7 @@
 
 
 def test_event_loop_fixture_finalizer_raises_warning_when_fixture_leaves_loop_unclosed(
-    pytester: Pytester,
+    pytester: Pytester, monkeypatch,
 ):
     pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
     pytester.makepyfile(
@@ -107,8 +107,6 @@
             import asyncio
             import pytest
 
-            pytest_plugins = 'pytest_asyncio'
-
             @pytest.fixture
             def event_loop():
                 loop = asyncio.get_event_loop_policy().new_event_loop()
@@ -120,13 +118,14 @@
             """
         )
     )
+    monkeypatch.setenv("PYTEST_PLUGINS", "asyncio")
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W", "default")
     result.assert_outcomes(passed=1, warnings=2)
     result.stdout.fnmatch_lines("*unclosed event loop*")
 
 
 def test_event_loop_fixture_finalizer_raises_warning_when_test_leaves_loop_unclosed(
-    pytester: Pytester,
+    pytester: Pytester, monkeypatch,
 ):
     pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
     pytester.makepyfile(
@@ -135,14 +134,13 @@
             import asyncio
             import pytest
 
-            pytest_plugins = 'pytest_asyncio'
-
             @pytest.mark.asyncio
             async def test_ends_with_unclosed_loop():
                 asyncio.set_event_loop(asyncio.new_event_loop())
             """
         )
     )
+    monkeypatch.setenv("PYTEST_PLUGINS", "asyncio")
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W", "default")
     result.assert_outcomes(passed=1, warnings=1)
     result.stdout.fnmatch_lines("*unclosed event loop*")