diff --git a/platformio/__init__.py b/platformio/__init__.py
index f50be5fe..83f86b3b 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -14,8 +14,6 @@
 
 import sys
 
-DEFAULT_REQUESTS_TIMEOUT = (10, None)  # (connect, read)
-
 VERSION = (4, 4, "0b3")
 __version__ = ".".join([str(s) for s in VERSION])
 
@@ -46,6 +44,8 @@ __registry_api__ = [
 ]
 __pioremote_endpoint__ = "ssl:host=remote.platformio.org:port=4413"
 
+__default_requests_timeout__ = (10, None)  # (connect, read)
+
 __core_packages__ = {
     "contrib-piohome": "~3.2.3",
     "contrib-pysite": "~2.%d%d.0" % (sys.version_info.major, sys.version_info.minor),
@@ -55,3 +55,11 @@ __core_packages__ = {
     "tool-clangtidy": "~1.100000.0",
     "tool-pvs-studio": "~7.7.0",
 }
+
+__check_internet_hosts__ = [
+    "140.82.118.3",  # Github.com
+    "35.231.145.151",  # Gitlab.com
+    "88.198.170.159",  # platformio.org
+    "github.com",
+    "platformio.org",
+]
diff --git a/platformio/clients/http.py b/platformio/clients/http.py
index 318448c7..8e732958 100644
--- a/platformio/clients/http.py
+++ b/platformio/clients/http.py
@@ -20,7 +20,7 @@ import socket
 import requests.adapters
 from requests.packages.urllib3.util.retry import Retry  # pylint:disable=import-error
 
-from platformio import DEFAULT_REQUESTS_TIMEOUT, app, util
+from platformio import __check_internet_hosts__, __default_requests_timeout__, app, util
 from platformio.cache import ContentCache
 from platformio.exception import PlatformioException, UserSideException
 
@@ -30,15 +30,6 @@ except ImportError:
     from urlparse import urljoin
 
 
-PING_REMOTE_HOSTS = [
-    "140.82.118.3",  # Github.com
-    "35.231.145.151",  # Gitlab.com
-    "88.198.170.159",  # platformio.org
-    "github.com",
-    "platformio.org",
-]
-
-
 class HTTPClientError(PlatformioException):
     def __init__(self, message, response=None):
         super(HTTPClientError, self).__init__()
@@ -125,7 +116,7 @@ class HTTPClient(object):
 
         # set default timeout
         if "timeout" not in kwargs:
-            kwargs["timeout"] = DEFAULT_REQUESTS_TIMEOUT
+            kwargs["timeout"] = __default_requests_timeout__
 
         while True:
             try:
@@ -179,7 +170,7 @@ class HTTPClient(object):
 def _internet_on():
     timeout = 2
     socket.setdefaulttimeout(timeout)
-    for host in PING_REMOTE_HOSTS:
+    for host in __check_internet_hosts__:
         try:
             for var in ("HTTP_PROXY", "HTTPS_PROXY"):
                 if not os.getenv(var) and not os.getenv(var.lower()):
@@ -208,7 +199,7 @@ def fetch_remote_content(*args, **kwargs):
         kwargs["headers"]["User-Agent"] = app.get_user_agent()
 
     if "timeout" not in kwargs:
-        kwargs["timeout"] = DEFAULT_REQUESTS_TIMEOUT
+        kwargs["timeout"] = __default_requests_timeout__
 
     r = requests.get(*args, **kwargs)
     r.raise_for_status()
diff --git a/platformio/commands/home/rpc/handlers/os.py b/platformio/commands/home/rpc/handlers/os.py
index 38bdcb8a..448c633a 100644
--- a/platformio/commands/home/rpc/handlers/os.py
+++ b/platformio/commands/home/rpc/handlers/os.py
@@ -22,7 +22,7 @@ from functools import cmp_to_key
 import click
 from twisted.internet import defer  # pylint: disable=import-error
 
-from platformio import DEFAULT_REQUESTS_TIMEOUT, fs, util
+from platformio import __default_requests_timeout__, fs, util
 from platformio.cache import ContentCache
 from platformio.clients.http import ensure_internet_on
 from platformio.commands.home import helpers
@@ -54,11 +54,11 @@ class OSRPC(object):
         session = helpers.requests_session()
         if data:
             r = yield session.post(
-                uri, data=data, headers=headers, timeout=DEFAULT_REQUESTS_TIMEOUT
+                uri, data=data, headers=headers, timeout=__default_requests_timeout__
             )
         else:
             r = yield session.get(
-                uri, headers=headers, timeout=DEFAULT_REQUESTS_TIMEOUT
+                uri, headers=headers, timeout=__default_requests_timeout__
             )
 
         r.raise_for_status()
diff --git a/platformio/package/download.py b/platformio/package/download.py
index 0f40fd0d..bd425ac6 100644
--- a/platformio/package/download.py
+++ b/platformio/package/download.py
@@ -21,7 +21,7 @@ from time import mktime
 import click
 import requests
 
-from platformio import DEFAULT_REQUESTS_TIMEOUT, app, fs
+from platformio import __default_requests_timeout__, app, fs
 from platformio.package.exception import PackageException
 
 
@@ -33,7 +33,7 @@ class FileDownloader(object):
             url,
             stream=True,
             headers={"User-Agent": app.get_user_agent()},
-            timeout=DEFAULT_REQUESTS_TIMEOUT,
+            timeout=__default_requests_timeout__,
         )
         if self._request.status_code != 200:
             raise PackageException(
diff --git a/tests/test_misc.py b/tests/test_misc.py
index f816fe6d..36574ee4 100644
--- a/tests/test_misc.py
+++ b/tests/test_misc.py
@@ -17,7 +17,7 @@
 import pytest
 import requests
 
-from platformio import proc
+from platformio import __check_internet_hosts__, proc
 from platformio.clients import http
 from platformio.clients.registry import RegistryClient
 
@@ -30,7 +30,7 @@ def test_platformio_cli():
 
 
 def test_ping_internet_ips():
-    for host in http.PING_REMOTE_HOSTS:
+    for host in __check_internet_hosts__:
         requests.get("http://%s" % host, allow_redirects=False, timeout=2)