diff --git a/tests/test_utils.py b/tests/test_utils.py
index 13d44df9..3da5dc3c 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -11,7 +11,7 @@ from requests.utils import (
     guess_filename, guess_json_utf, is_ipv4_address,
     is_valid_cidr, iter_slices, parse_dict_header,
     parse_header_links, prepend_scheme_if_needed,
-    requote_uri, select_proxy, super_len,
+    requote_uri, select_proxy, should_bypass_proxies, super_len,
     to_key_val_list, to_native_string,
     unquote_header_value, unquote_unreserved,
     urldefragauth)
@@ -131,6 +131,42 @@ class TestGetEnvironProxies:
         assert get_environ_proxies(url) != {}
 
 
+class TestShouldBypassProxies:
+    """
+    Tests for should_bypass_proxies function
+    """
+
+    @pytest.mark.parametrize(
+        'url, expected', (
+                ('http://192.168.0.1:5000/', True),
+                ('http://192.168.0.1/', True),
+                ('http://172.16.1.1/', True),
+                ('http://172.16.1.1:5000/', True),
+                ('http://localhost.localdomain:5000/v1.0/', True),
+        ))
+    def test_should_bypass_proxies(self, url, expected, monkeypatch):
+        """
+        Test to check if proxy is bypassed
+        """
+        monkeypatch.setenv('no_proxy', '192.168.0.0/24,127.0.0.1,localhost.localdomain,172.16.1.1')
+        monkeypatch.setenv('NO_PROXY', '192.168.0.0/24,127.0.0.1,localhost.localdomain,172.16.1.1')
+        assert should_bypass_proxies(url) == expected
+
+    @pytest.mark.parametrize(
+        'url, expected', (
+                ('http://172.16.1.12/', False),
+                ('http://172.16.1.12:5000/', False),
+                ('http://google.com:5000/v1.0/', False),
+        ))
+    def test_should_bypass_proxies(self, url, expected, monkeypatch):
+        """
+        Test to check if proxy is not bypassed
+        """
+        monkeypatch.setenv('no_proxy', '192.168.0.0/24,127.0.0.1,localhost.localdomain,172.16.1.1')
+        monkeypatch.setenv('NO_PROXY', '192.168.0.0/24,127.0.0.1,localhost.localdomain,172.16.1.1')
+        assert should_bypass_proxies(url) == expected
+
+
 class TestIsIPv4Address:
 
     def test_valid(self):