DeprecationWarning: ABCs from `collections` in python3.7

Code Sample, a copy-pastable example if possible

import pandas

Problem description

I receive a DeprecationWarning when testing scripts importing pandas (0.23.4) with python3.7, using pytest (3.9.1).

Expected Output

$ py.test test.py
============================ test session starts =============================
platform linux -- Python 3.7.1, pytest-3.9.1, py-1.7.0, pluggy-0.8.0
rootdir: /home/iago-lito/tests, inifile:
collected 0 items                                                            

======================== no tests ran in 0.09 seconds ========================

Actual Output

$ py.test test.py
============================ test session starts =============================
platform linux -- Python 3.7.1, pytest-3.9.1, py-1.7.0, pluggy-0.8.0
rootdir: /home/iago-lito/tests, inifile:
collected 0 items                                                            

============================== warnings summary ==============================
/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

/usr/lib/python3.7/site-packages/pandas/core/tools/datetimes.py:3: 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 MutableMapping

-- Docs: https://docs.pytest.org/en/latest/warnings.html
========================= 2 warnings in 0.31 seconds =========================

Output of pd.show_versions()

INSTALLED VERSIONS
------------------
commit: None
python: 3.7.1.final.0
python-bits: 64
OS: Linux
OS-release: 4.19.2-arch1-1-ARCH
machine: x86_64
processor: 
byteorder: little
LC_ALL: None
LANG: fr_FR.UTF-8
LOCALE: fr_FR.UTF-8

pandas: 0.23.4
pytest: 3.9.1
pip: 18.0
setuptools: 40.6.2
Cython: None
numpy: 1.15.2
scipy: 1.1.0
pyarrow: None
xarray: None
IPython: None
sphinx: None
patsy: None
dateutil: 2.7.3
pytz: 2018.7
blosc: None
bottleneck: None
tables: None
numexpr: None
feather: None
matplotlib: 3.0.0
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: 1.0.1
sqlalchemy: None
pymysql: None
psycopg2: 2.7.6.1 (dt dec pq3 ext lo64)
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None

[TomAugspurger]

Fixed on master. Hoping to do a release in a few weeks.

[ntjess]

I see. I created a new environment with just pytest and pandas and indeed the error does not show.