Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
_______________________ test_plugins_installation[True] ________________________
httpie_plugins_success = <function httpie_plugins_success.<locals>.runner at 0x3ff9fdd7920>
interface = Interface(path=PosixPath('/tmp/pytest-of-mockbuild/pytest-0/test_plugins_installation_True0/interface'), environment=<...dout': <tempfile._TemporaryFileWrapper object at 0x3ff9fdd7890>,
 'stdout_encoding': 'utf-8',
 'stdout_isatty': True}>)
dummy_plugin = Plugin(interface=Interface(path=PosixPath('/tmp/pytest-of-mockbuild/pytest-0/test_plugins_installation_True0/interface...ue}>), name='httpie-0a89011a', version='1.0.0', entry_points=[EntryPoint(name='test', group='httpie.plugins.auth.v1')])
cli_mode = True
    @pytest.mark.requires_installation
    @pytest.mark.parametrize('cli_mode', [True, False])
    def test_plugins_installation(httpie_plugins_success, interface, dummy_plugin, cli_mode):
>       lines = httpie_plugins_success('install', dummy_plugin.path, cli_mode=cli_mode)
tests/test_plugins_cli.py:10: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

Installation of dummy plugin failed.