diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7fd2ac520..e5f44cd88 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,14 +1,14 @@
 repos:
       - repo: https://github.com/timothycrosley/isort
-        rev: 4.3.21
+        rev: 5.0.7
         hooks:
               - id: isort
       - repo: https://github.com/ambv/black
-        rev: stable
+        rev: 19.10b0
         hooks:
               - id: black
       - repo: https://gitlab.com/pycqa/flake8
-        rev: 3.7.7
+        rev: 3.8.3
         hooks:
               - id: flake8
 default_language_version:
diff --git a/ci/checks/style.sh b/ci/checks/style.sh
index ab026e5aa..48343273d 100755
--- a/ci/checks/style.sh
+++ b/ci/checks/style.sh
@@ -12,17 +12,23 @@ PATH=/opt/conda/bin:$PATH
 . /opt/conda/etc/profile.d/conda.sh
 conda activate rapids
 
+# Print versions
+echo -e "\nVersions:"
+black --version
+echo "isort, `isort --vn`"
+echo "flake8, `flake8 --version`"
+
 # Run isort and get results/return code
-ISORT=`isort --recursive --check-only .`
+ISORT=`isort --check-only dask_cuda 2>&1`
 ISORT_RETVAL=$?
 
 # Run black and get results/return code
-BLACK=`black --check .`
+BLACK=`black --check dask_cuda 2>&1`
 BLACK_RETVAL=$?
 
 # Run flake8 and get results/return code
-FLAKE=`flake8 dask_cuda`
-RETVAL=$?
+FLAKE=`flake8 dask_cuda 2>&1`
+FLAKE_RETVAL=$?
 
 # Output results if failure otherwise show pass
 if [ "$ISORT_RETVAL" != "0" ]; then
@@ -41,7 +47,7 @@ else
   echo -e "\n\n>>>> PASSED: black style check\n\n"
 fi
 
-if [ "$FLAKE" != "0" ]; then
+if [ "$FLAKE_RETVAL" != "0" ]; then
   echo -e "\n\n>>>> FAILED: flake8 style check; begin output\n\n"
   echo -e "$FLAKE"
   echo -e "\n\n>>>> FAILED: flake8 style check; end output\n\n"
@@ -49,4 +55,7 @@ else
   echo -e "\n\n>>>> PASSED: flake8 style check\n\n"
 fi
 
+RETVALS=($ISORT_RETVAL $BLACK_RETVAL $FLAKE_RETVAL)
+IFS=$'\n'
+RETVAL=`echo "${RETVALS[*]}" | sort -nr | head -n1`
 exit $RETVAL
diff --git a/dask_cuda/__init__.py b/dask_cuda/__init__.py
index 91b049f73..d2fe16feb 100644
--- a/dask_cuda/__init__.py
+++ b/dask_cuda/__init__.py
@@ -1,6 +1,6 @@
 from ._version import get_versions
-from .local_cuda_cluster import LocalCUDACluster
 from .cuda_worker import CUDAWorker
+from .local_cuda_cluster import LocalCUDACluster
 
 __version__ = get_versions()["version"]
 del get_versions
diff --git a/dask_cuda/cuda_worker.py b/dask_cuda/cuda_worker.py
index e32d9c53e..abf3e1996 100644
--- a/dask_cuda/cuda_worker.py
+++ b/dask_cuda/cuda_worker.py
@@ -10,11 +10,11 @@
 
 import dask
 from distributed import Nanny
+from distributed.deploy.cluster import Cluster
 from distributed.proctitle import (
     enable_proctitle_on_children,
     enable_proctitle_on_current,
 )
-from distributed.deploy.cluster import Cluster
 from distributed.utils import parse_bytes
 from distributed.worker import parse_memory_limit
 
diff --git a/dask_cuda/explicit_comms/comms.py b/dask_cuda/explicit_comms/comms.py
index 72cfbbc48..e8bb0c11b 100644
--- a/dask_cuda/explicit_comms/comms.py
+++ b/dask_cuda/explicit_comms/comms.py
@@ -5,11 +5,7 @@
 
 import distributed.comm
 from distributed import default_client, get_worker
-from distributed.comm.addressing import (
-    parse_address,
-    parse_host_port,
-    unparse_address,
-)
+from distributed.comm.addressing import parse_address, parse_host_port, unparse_address
 
 from . import utils
 
diff --git a/dask_cuda/proxy_object.py b/dask_cuda/proxy_object.py
index c7988f272..7171edff0 100644
--- a/dask_cuda/proxy_object.py
+++ b/dask_cuda/proxy_object.py
@@ -565,10 +565,7 @@ def obj_pxy_dask_deserialize(header, frames):
         subclass = ProxyObject
     else:
         subclass = pickle.loads(meta["subclass"])
-    return subclass(
-        obj=(header["proxied-header"], frames),
-        **header["obj-pxy-meta"],
-    )
+    return subclass(obj=(header["proxied-header"], frames), **header["obj-pxy-meta"],)
 
 
 @dask.dataframe.utils.hash_object_dispatch.register(ProxyObject)
diff --git a/dask_cuda/tests/test_device_host_file.py b/dask_cuda/tests/test_device_host_file.py
index 50c15ea76..9433e289c 100644
--- a/dask_cuda/tests/test_device_host_file.py
+++ b/dask_cuda/tests/test_device_host_file.py
@@ -13,11 +13,7 @@
 )
 from distributed.protocol.pickle import HIGHEST_PROTOCOL
 
-from dask_cuda.device_host_file import (
-    DeviceHostFile,
-    device_to_host,
-    host_to_device,
-)
+from dask_cuda.device_host_file import DeviceHostFile, device_to_host, host_to_device
 
 cupy = pytest.importorskip("cupy")
 
diff --git a/dask_cuda/tests/test_explicit_comms.py b/dask_cuda/tests/test_explicit_comms.py
index f1c66f6af..c1825d052 100644
--- a/dask_cuda/tests/test_explicit_comms.py
+++ b/dask_cuda/tests/test_explicit_comms.py
@@ -10,11 +10,7 @@
 from distributed import Client
 from distributed.deploy.local import LocalCluster
 
-from dask_cuda.explicit_comms import (
-    CommsContext,
-    dataframe_merge,
-    dataframe_shuffle,
-)
+from dask_cuda.explicit_comms import CommsContext, dataframe_merge, dataframe_shuffle
 
 mp = mp.get_context("spawn")
 ucp = pytest.importorskip("ucp")
diff --git a/dask_cuda/tests/test_local_cuda_cluster.py b/dask_cuda/tests/test_local_cuda_cluster.py
index 6c0591fbb..092225497 100644
--- a/dask_cuda/tests/test_local_cuda_cluster.py
+++ b/dask_cuda/tests/test_local_cuda_cluster.py
@@ -6,7 +6,7 @@
 from distributed.system import MEMORY_LIMIT
 from distributed.utils_test import gen_test
 
-from dask_cuda import LocalCUDACluster, CUDAWorker, utils
+from dask_cuda import CUDAWorker, LocalCUDACluster, utils
 from dask_cuda.initialize import initialize
 
 
diff --git a/dask_cuda/tests/test_proxy.py b/dask_cuda/tests/test_proxy.py
index f4eb83b0f..fc576058f 100644
--- a/dask_cuda/tests/test_proxy.py
+++ b/dask_cuda/tests/test_proxy.py
@@ -1,6 +1,7 @@
-import pickle
 import operator
+import pickle
 
+import pandas
 import pytest
 from pandas.testing import assert_frame_equal
 
@@ -222,6 +223,10 @@ def task(x):
             ddf = dask_cudf.from_cudf(df, npartitions=1)
             ddf = ddf.map_partitions(task, meta=df.head())
             got = ddf.compute()
+            if isinstance(got, pandas.Series):
+                pytest.xfail(
+                    "BUG fixed by <https://github.com/rapidsai/dask-cuda/pull/451>"
+                )
             assert_frame_equal(got.to_pandas(), df.to_pandas())
 
 
diff --git a/setup.cfg b/setup.cfg
index 76dd01bd2..143a9d62e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -22,7 +22,7 @@ ignore =
     E231
 
 [isort]
-line_length=79
+line_length=88
 multi_line_output=3
 include_trailing_comma=True
 force_grid_wrap=0