Show asyncio mode in pytest report headers

Author: asvetlov

pytest_asyncio/plugin.py

@@ -187,6 +187,13 @@ def pytest_configure(config: Config) -> None:
         config.issue_config_time_warning(LEGACY_MODE, stacklevel=2)
 
 
+@pytest.mark.tryfirst
+def pytest_report_header(config: Config) -> List[str]:
+    """Add asyncio config to pytest header."""
+    mode = _get_asyncio_mode(config)
+    return [f"asyncio: mode={mode}"]
+
+
 @pytest.mark.tryfirst
 def pytest_pycollect_makeitem(
     collector: Union[pytest.Module, pytest.Class], name: str, obj: object