diff --git a/ci/deps/travis-36-cov.yaml b/ci/deps/travis-36-cov.yaml
index 48e9e3b6896f3..847e9f66d2c72 100644
--- a/ci/deps/travis-36-cov.yaml
+++ b/ci/deps/travis-36-cov.yaml
@@ -29,7 +29,7 @@ dependencies:
   - python-snappy
   - python=3.6.*
   - pytz
-  - s3fs
+  - s3fs<0.3
   - scikit-learn
   - scipy
   - sqlalchemy
diff --git a/ci/deps/travis-36-slow.yaml b/ci/deps/travis-36-slow.yaml
index e9c5dadbc924a..d54708d48a65e 100644
--- a/ci/deps/travis-36-slow.yaml
+++ b/ci/deps/travis-36-slow.yaml
@@ -18,7 +18,7 @@ dependencies:
   - python-dateutil
   - python=3.6.*
   - pytz
-  - s3fs
+  - s3fs<0.3
   - scipy
   - sqlalchemy
   - xlrd
diff --git a/ci/deps/travis-37.yaml b/ci/deps/travis-37.yaml
index 4bc490e202818..2fc4d160c8c27 100644
--- a/ci/deps/travis-37.yaml
+++ b/ci/deps/travis-37.yaml
@@ -17,7 +17,7 @@ dependencies:
   - pytest-xdist
   - pytest-mock
   - hypothesis>=3.58.0
-  - s3fs
+  - s3fs<0.3
   - pip
   - pyreadstat
   - pip:
diff --git a/pandas/tests/groupby/test_categorical.py b/pandas/tests/groupby/test_categorical.py
index 9750a36d9350b..b08868f311f76 100644
--- a/pandas/tests/groupby/test_categorical.py
+++ b/pandas/tests/groupby/test_categorical.py
@@ -782,7 +782,7 @@ def test_categorical_no_compress():
 
 def test_sort():
 
-    # http://stackoverflow.com/questions/23814368/sorting-pandas-categorical-labels-after-groupby  # noqa: flake8
+    # http://stackoverflow.com/questions/23814368/sorting-pandas-categorical-labels-after-groupby  # noqa: E501
     # This should result in a properly sorted Series so that the plot
     # has a sorted x axis
     # self.cat.groupby(['value_group'])['value_group'].count().plot(kind='bar')