uproot test fail

[reik@reik-msi uproot]$ pytest
========================================= test session starts ==========================================
platform linux -- Python 3.7.2, pytest-4.1.1, py-1.7.0, pluggy-0.8.1
rootdir: /home/reik/Projects/uproot-dev/uproot, inifile:
collected 91 items

tests/test_cache.py ....                                                                         [  4%]
tests/test_compression.py .....                                                                  [  9%]
tests/test_http.py .....                                                                         [ 15%]
tests/test_issues.py ......................                                                      [ 39%]
tests/test_jagged.py ...                                                                         [ 42%]
tests/test_stlvector.py .......                                                                  [ 50%]
tests/test_tree.py ................................                                              [ 85%]
tests/test_versions.py ...........                                                               [ 97%]
tests/test_write.py F.                                                                           [100%]

=============================================== FAILURES ===============================================
_____________________________________________ test_strings _____________________________________________

tmp_path = PosixPath('/tmp/pytest-of-reik/pytest-1/test_strings0')

    def test_strings(tmp_path):
        ROOT = pytest.importorskip("ROOT")
        filename = join(str(tmp_path), "example.root")

        with uproot.recreate(filename) as f:
            f["hello"] = "world"

        f = ROOT.TFile.Open(filename)
>       assert f.Get("hello") == "world"
E       AssertionError: assert <cppyy.gbl.TObjString object at 0x5612ff22e3a0> == 'world'
E        +  where <cppyy.gbl.TObjString object at 0x5612ff22e3a0> = <bound method _TDirectoryFile_Get of <cppyy.gbl.TFile object at 0x5612fda9b3e0>>('hello')
E        +    where <bound method _TDirectoryFile_Get of <cppyy.gbl.TFile object at 0x5612fda9b3e0>> = <cppyy.gbl.TFile object at 0x5612fda9b3e0>.Get

tests/test_write.py:46: AssertionError
=========================================== warnings summary ===========================================
/usr/lib/python3.7/site-packages/cachetools-3.0.0-py3.7.egg/cachetools/abc.py:7
  /usr/lib/python3.7/site-packages/cachetools-3.0.0-py3.7.egg/cachetools/abc.py:7: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
    class DefaultMapping(collections.MutableMapping):

/usr/lib/python3.7/site-packages/pandas/core/dtypes/inference.py:6
  /usr/lib/python3.7/site-packages/pandas/core/dtypes/inference.py:6: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
    from collections import Iterable

-- Docs: https://docs.pytest.org/en/latest/warnings.html
=========================== 1 failed, 90 passed, 2 warnings in 5.90 seconds ============================