diff --git a/tests/unit/api_test.py b/tests/unit/api_test.py
index 7e3e95178..6117991e4 100644
--- a/tests/unit/api_test.py
+++ b/tests/unit/api_test.py
@@ -480,11 +480,12 @@ class TCPSocketStreamTest(unittest.TestCase):
     @classmethod
     def setup_class(cls):
         cls.server = socketserver.ThreadingTCPServer(
-            ('', 0), cls.get_handler_class())
+            ('127.0.0.1', 0), cls.get_handler_class())
         cls.thread = threading.Thread(target=cls.server.serve_forever)
         cls.thread.daemon = True
         cls.thread.start()
-        cls.address = f'http://{socket.gethostname()}:{cls.server.server_address[1]}'
+        host, port = cls.server.server_address
+        cls.address = f'http://{host}:{port}'
 
     @classmethod
     def teardown_class(cls):
diff --git a/tests/unit/utils_config_test.py b/tests/unit/utils_config_test.py
index c87231a99..ece5e7886 100644
--- a/tests/unit/utils_config_test.py
+++ b/tests/unit/utils_config_test.py
@@ -19,7 +19,9 @@ def tmpdir(self, tmpdir):
     def test_find_config_fallback(self):
         tmpdir = self.mkdir('test_find_config_fallback')
 
-        with mock.patch.dict(os.environ, {'HOME': str(tmpdir)}):
+        with mock.patch.dict(os.environ, {
+            'HOME': str(tmpdir), 'USERPROFILE': str(tmpdir)
+        }):
             assert config.find_config_file() is None
 
     def test_find_config_from_explicit_path(self):
@@ -43,12 +45,13 @@ def test_find_config_from_home_posix(self):
         with mock.patch.dict(os.environ, {'HOME': str(tmpdir)}):
             assert config.find_config_file() == str(config_path)
 
-    @mark.skipif("sys.platform == 'win32'")
     def test_find_config_from_home_legacy_name(self):
         tmpdir = self.mkdir('test_find_config_from_home_legacy_name')
         config_path = tmpdir.ensure('.dockercfg')
 
-        with mock.patch.dict(os.environ, {'HOME': str(tmpdir)}):
+        with mock.patch.dict(os.environ, {
+            'HOME': str(tmpdir), 'USERPROFILE': str(tmpdir)
+        }):
             assert config.find_config_file() == str(config_path)
 
     @mark.skipif("sys.platform != 'win32'")
diff --git a/tests/unit/utils_test.py b/tests/unit/utils_test.py
index 21da0b58e..633911dec 100644
--- a/tests/unit/utils_test.py
+++ b/tests/unit/utils_test.py
@@ -132,6 +132,7 @@ def test_kwargs_from_env_tls_verify_false_no_cert(self):
 
         os.environ.update(DOCKER_HOST='tcp://192.168.59.103:2376',
                           HOME=temp_dir,
+                          USERPROFILE=temp_dir,
                           DOCKER_TLS_VERIFY='')
         os.environ.pop('DOCKER_CERT_PATH', None)
         kwargs = kwargs_from_env()
@@ -144,6 +145,7 @@ def test_kwargs_from_env_no_cert_path(self):
             shutil.copytree(TEST_CERT_DIR, cert_dir)
 
             os.environ.update(HOME=temp_dir,
+                              USERPROFILE=temp_dir,
                               DOCKER_CERT_PATH='',
                               DOCKER_TLS_VERIFY='1')