test: Adapt unmarked async tests in strict mode for pytest 8.4.0

Async tests fail instead of skipping and warning with Pytest 8.4.0 if
no suitable async plugin is installed[1]. Adjust expectation of these
tests to pass the testsuite with Pytest 8.4.0.

Link: https://docs.pytest.org/en/stable/changelog.html#pytest-8-4-0-2025-06-02 # [1]
Signed-off-by: Yao Zi <ziyao@disroot.org>

Author: ziyao233

tests/modes/test_strict_mode.py

@@ -2,7 +2,7 @@
 
 from textwrap import dedent
 
-from pytest import Pytester
+from pytest import Pytester, version_tuple as pytest_version
 
 
 def test_strict_mode_cmdline(pytester: Pytester):
@@ -95,7 +95,10 @@ async def test_anything():
         )
     )
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
-    result.assert_outcomes(skipped=1, warnings=1)
+    if pytest_version >= (8, 4, 0):
+        result.assert_outcomes(failed=1, skipped=0, warnings=0)
+    else:
+        result.assert_outcomes(skipped=1, warnings=1)
     result.stdout.fnmatch_lines(["*async def functions are not natively supported*"])
 
 
@@ -117,7 +120,11 @@ async def test_anything(any_fixture):
         )
     )
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
-    result.assert_outcomes(skipped=1, warnings=2)
+
+    if pytest_version >= (8, 4, 0):
+        result.assert_outcomes(failed=1, skipped=0, warnings=2)
+    else:
+        result.assert_outcomes(skipped=1, warnings=2)
     result.stdout.fnmatch_lines(
         [
             "*async def functions are not natively supported*",
@@ -149,7 +156,10 @@ async def test_anything(any_fixture):
         )
     )
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
-    result.assert_outcomes(passed=1, failed=0, skipped=0, warnings=1)
+    if pytest_version >= (8, 4, 0):
+        result.assert_outcomes(passed=1, failed=0, skipped=0, warnings=2)
+    else:
+        result.assert_outcomes(passed=1, failed=0, skipped=0, warnings=1)
     result.stdout.fnmatch_lines(
         [
             "*warnings summary*",
@@ -193,7 +203,10 @@ async def test_anything(any_fixture):
         )
     )
     result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
-    result.assert_outcomes(passed=1, warnings=1)
+    if pytest_version >= (8, 4, 0):
+        result.assert_outcomes(passed=1, warnings=2)
+    else:
+        result.assert_outcomes(passed=1, warnings=1)
     result.stdout.fnmatch_lines(
         [
             "*warnings summary*",