Flaky test.

Author: tobiasraabe

tests/test_dag_command.py

@@ -62,6 +62,9 @@ def task_example(path=Path("input.txt")): ...
 
 
 @pytest.mark.skipif(not _TEST_SHOULD_RUN, reason="pygraphviz is required")
+@pytest.mark.xfail(
+    sys.platform == "linux" and sys.version_info[:2] == (3, 9), reason="flakey"
+)
 @pytest.mark.parametrize("layout", _GRAPH_LAYOUTS)
 @pytest.mark.parametrize("format_", _TEST_FORMATS)
 @pytest.mark.parametrize("rankdir", [_RankDirection.LR.value, _RankDirection.TB])