_ PythonTestRunnerIntegrationTest.test_single_passing_test _

                     self = <pants.backend.python.rules.python_test_runner_integration_test.PythonTestRunnerIntegrationTest testMethod=test_single_passing_test>

                         def test_single_passing_test(self) -> None:
                     >     result = self.run_pytest([self.good_source])

                     pants/backend/python/rules/python_test_runner_integration_test.py:108:
                     _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
                     pants/backend/python/rules/python_test_runner_integration_test.py:87: in run_pytest
                         input_snapshot = self.request_single_product(Snapshot, InputFilesContent(source_files))
                     pants/testutil/test_base.py:447: in request_single_product
                         self.scheduler.product_request(product_type, [subject])
                     pants/testutil/test_base.py:410: in scheduler
                         self._init_engine()
                     pants/testutil/test_base.py:400: in _init_engine
                         build_ignore_patterns=None,
                     pants/init/engine_initializer.py:436: in setup_legacy_graph_extended
                         visualize_to_dir=bootstrap_options.native_engine_visualize_to,
                     pants/engine/scheduler.py:116: in __init__
                         self._assert_ruleset_valid()
                     pants/engine/scheduler.py:129: in _assert_ruleset_valid
                         self._raise_or_return(self._native.lib.validator_run(self._scheduler))
                     pants/engine/scheduler.py:141: in _raise_or_return
                         return self._native.context.raise_or_return(pyresult)
                     _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

                     self = <pants.engine.native.ExternContext object at 0x106260630>
                     pyresult = <cdata 'PyResult' owning 16 bytes>

                         def raise_or_return(self, pyresult):
                           """Consumes the given PyResult to raise/return the exception/value it represents."""
                           value = self.from_value(pyresult.handle)
                           self._handles.remove(pyresult.handle)
                           if pyresult.is_throw:
                     >       raise value
                     E       Exception: Rules with errors: 1
                     E         (TestResult, [PythonTestsAdaptor, PyTest, PythonSetup, SubprocessEncodingEnvironment], [Get(TransitiveHydratedTargets, BuildFileAddresses), Get(Pex, CreatePexFromTargetClosure), Get(SourceRootStrippedSources, Address), Get(ChrootedPythonSources, HydratedTargets), Get(Digest, DirectoriesToMerge), Get(FallibleExecuteProcessResult, ExecuteProcessRequest)], run_python_test()):
                     E           Was not usable by any other @rule.

                     pants/engine/native.py:665: Exception

input_snapshot = self.request_single_product(Snapshot, InputFilesContent(source_files))