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The following code snippet on Exceptions does not run, it errors on "tests" not defined.

Suggest adding line: tests = ['testrun1.exe', 'testrun2.exe'] before "for" loop, then the intended exception is raised.

excs = []
for test in tests:
    try:
        test.run()
    except Exception as e:
        excs.append(e)

if excs:
   raise ExceptionGroup("Test Failures", excs)