From 7edf728dc6dca340a8a8ff6bf4444a45542e7ca7 Mon Sep 17 00:00:00 2001
From: Bruno Pagani <bruno.n.pagani@gmail.com>
Date: Wed, 19 Feb 2020 11:40:36 +0000
Subject: [PATCH] Avoid running test_open_mfdataset_list_attr without dask

Fixes GH-3777.
---
 doc/whats-new.rst             | 3 +++
 xarray/tests/test_backends.py | 1 +
 2 files changed, 4 insertions(+)

diff --git a/doc/whats-new.rst b/doc/whats-new.rst
index bf8e63eb926..e3e4eca7a01 100644
--- a/doc/whats-new.rst
+++ b/doc/whats-new.rst
@@ -37,6 +37,9 @@ Internal Changes
 - Removed the internal ``import_seaborn`` function which handled the deprecation of
   the ``seaborn.apionly`` entry point (:issue:`3747`).
   By `Mathias Hauser <https://github.com/mathause>`_.
+- Changed test_open_mfdataset_list_attr to only run with dask installed
+  (:issue:`3777`, :pull:`3780`).
+  By `Bruno Pagani <https://github.com/ArchangeGabriel>`_.
 
 .. _whats-new.0.15.0:
 
diff --git a/xarray/tests/test_backends.py b/xarray/tests/test_backends.py
index bb77cbb94fe..b7ba70ef6c4 100644
--- a/xarray/tests/test_backends.py
+++ b/xarray/tests/test_backends.py
@@ -2540,6 +2540,7 @@ def test_open_mfdataset_manyfiles(
 
 
 @requires_netCDF4
+@requires_dask
 def test_open_mfdataset_list_attr():
     """
     Case when an attribute of type list differs across the multiple files