seleniumのリモートwebdriverへの接続に失敗する

前提

djangoでWEBアプリを作成しています。
UIテストの実行時、seleniumのリモートwebdriverへの接続がうまくいかず困っています。

お力添えいただけますと幸いです。

以下のtest_ui.pyが問題のコードです。

発生している問題・エラーメッセージ

test_ui.pyの実行結果
1======================================================================
2ERROR: setUpClass (diary.tests.test_ui.UiTest)
3----------------------------------------------------------------------
4Traceback (most recent call last):
5  File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line 175, in _new_conn
6    (self._dns_host, self.port), self.timeout, **extra_kw
7  File "/usr/local/lib/python3.7/site-packages/urllib3/util/connection.py", line 72, in create_connection
8    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
9  File "/usr/local/lib/python3.7/socket.py", line 752, in getaddrinfo
10    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
11socket.gaierror: [Errno -5] No address associated with hostname
12
13During handling of the above exception, another exception occurred:
14
15Traceback (most recent call last):
16  File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 710, in urlopen
17    chunked=chunked,
18  File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 398, in _make_request
19    conn.request(method, url, **httplib_request_kw)
20  File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line 239, in request
21    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
22  File "/usr/local/lib/python3.7/http/client.py", line 1281, in request
23    self._send_request(method, url, body, headers, encode_chunked)
24  File "/usr/local/lib/python3.7/http/client.py", line 1327, in _send_request
25    self.endheaders(body, encode_chunked=encode_chunked)
26  File "/usr/local/lib/python3.7/http/client.py", line 1276, in endheaders
27    self._send_output(message_body, encode_chunked=encode_chunked)
28  File "/usr/local/lib/python3.7/http/client.py", line 1036, in _send_output
29    self.send(msg)
30  File "/usr/local/lib/python3.7/http/client.py", line 976, in send
31    self.connect()
32  File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line 205, in connect
33    conn = self._new_conn()
34  File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line 187, in _new_conn
35    self, "Failed to establish a new connection: %s" % e
36urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fa6990c4b10>: Failed to establish a new connection: [Errno -5] No address associated with hostname
37
38During handling of the above exception, another exception occurred:
39
40Traceback (most recent call last):
41  File "/usr/src/app/nyapu/diary/tests/test_ui.py", line 26, in setUpClass
42    options = webdriver.ChromeOptions(),
43  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 272, in __init__
44    self.start_session(capabilities, browser_profile)
45  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 364, in start_session
46    response = self.execute(Command.NEW_SESSION, parameters)
47  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 427, in execute
48    response = self.command_executor.execute(driver_command, params)
49  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/remote/remote_connection.py", line 344, in execute
50    return self._request(command_info[0], url, body=data)
51  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/remote/remote_connection.py", line 366, in _request
52    response = self._conn.request(method, url, body=body, headers=headers)
53  File "/usr/local/lib/python3.7/site-packages/urllib3/request.py", line 79, in request
54    method, url, fields=fields, headers=headers, **urlopen_kw
55  File "/usr/local/lib/python3.7/site-packages/urllib3/request.py", line 170, in request_encode_body
56    return self.urlopen(method, url, **extra_kw)
57  File "/usr/local/lib/python3.7/site-packages/urllib3/poolmanager.py", line 376, in urlopen
58    response = conn.urlopen(method, u.request_uri, **kw)
59  File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 828, in urlopen
60    **response_kw
61  File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 828, in urlopen
62    **response_kw
63  File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 828, in urlopen
64    **response_kw
65  File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 788, in urlopen
66    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
67  File "/usr/local/lib/python3.7/site-packages/urllib3/util/retry.py", line 592, in increment
68    raise MaxRetryError(_pool, url, error or ResponseError(cause))
69urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='chrome', port=4444): Max retries exceeded with url: /wd/hub/session (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fa6990c4b10>: Failed to establish a new connection: [Errno -5] No address associated with hostname'))
70
71----------------------------------------------------------------------
72Ran 0 tests in 0.195s
73
74FAILED (errors=1)

該当のソースコード

test_ui.py
1from django.contrib.staticfiles.testing import StaticLiveServerTestCase
2from django.urls import reverse_lazy
3from selenium import webdriver
4
5～略～
6
7class UiTest(StaticLiveServerTestCase):
8    fixtures = ['test/test_view.json']
9
10    @classmethod
11    def setUpClass(cls):
12        super().setUpClass()        
13        cls.selenium = webdriver.Remote(
14        command_executor='http://chrome:4444/wd/hub',
15        options = webdriver.ChromeOptions(),
16        )
17
18～略～