diff --git a/pipenv/patched/notpip/index.py b/pipenv/patched/notpip/index.py
index bf1cba9c7f..f452c8c46b 100644
--- a/pipenv/patched/notpip/index.py
+++ b/pipenv/patched/notpip/index.py
@@ -206,30 +206,26 @@ def add_dependency_links(self, links):
             )
             self.dependency_links.extend(links)
 
-    def get_extras_links(self, links):
+    @staticmethod
+    def get_extras_links(links):
         requires = []
         extras = {}
 
-        current_section = None
+        current_list = requires
 
         for link in links:
             if not link:
-                current_section = None
-
-            if not current_section:
-                if not (link.startswith('[')):
-                    requires.append(link)
-                else:
-                    current_section = link[1:-1]
-                    extras[current_section] = []
+                current_list = requires
+            if link.startswith('['):
+                current_list = []
+                extras[link[1:-1]] = current_list
             else:
-                extras[current_section].append(link)
+                current_list.append(link)
 
         return extras
 
 
 
-
     @staticmethod
     def _sort_locations(locations, expand_dir=False):
         """
diff --git a/tasks/vendoring/patches/patched/pip.patch b/tasks/vendoring/patches/patched/pip.patch
index b8555c5b40..8e06880677 100644
--- a/tasks/vendoring/patches/patched/pip.patch
+++ b/tasks/vendoring/patches/patched/pip.patch
@@ -1362,29 +1362,29 @@ index f653f6e..48aaa35 100644
              )
              self.dependency_links.extend(links)
  
-+    def get_extras_links(self, links):
++    @classmethod
++    def get_extras_links(links):
 +        requires = []
 +        extras = {}
 +
-+        current_section = None
++        current_list = requires
 +
 +        for link in links:
 +            if not link:
-+                current_section = None
-+
-+            if not current_section:
-+                if not (link.startswith('[')):
-+                    requires.append(link)
-+                else:
-+                    current_section = link[1:-1]
-+                    extras[current_section] = []
++                current_list = requires
++            if link.startswith('['):
++                current_list = []
++                extras[link[1:-1]] = current_list
 +            else:
-+                extras[current_section].append(link)
++                current_list.append(link)
 +
 +        return extras
 +
 +
 +
++
++
++
 +
      @staticmethod
      def _sort_locations(locations, expand_dir=False):
diff --git a/tests/unit/test_patched.py b/tests/unit/test_patched.py
new file mode 100644
index 0000000000..8d396539fb
--- /dev/null
+++ b/tests/unit/test_patched.py
@@ -0,0 +1,131 @@
+from __future__ import absolute_import
+
+import pytest
+
+from notpip.index import PackageFinder
+
+
+get_extras_links_scenarios = {
+    'windows and not windows': (
+        [
+            'chardet',
+            '[:platform_system != "windows"]',
+            'twisted',
+            '[:platform_system == "windows"]',
+            'twisted[windows_platform]',
+        ],
+        {
+            ':platform_system != "windows"': [
+                'twisted',
+            ],
+            ':platform_system == "windows"': [
+                'twisted[windows_platform]',
+            ],
+        },
+    ),
+    'requests': (
+        [
+            'chardet<3.1.0,>=3.0.2',
+            'idna<2.7,>=2.5',
+            'urllib3<1.23,>=1.21.1',
+            'certifi>=2017.4.17',
+            '[security]',
+            'pyOpenSSL>=0.14',
+            'cryptography>=1.3.4',
+            'idna>=2.0.0',
+            '[socks]',
+            'PySocks!=1.5.7,>=1.5.6',
+            (
+                '[socks:sys_platform == "win32"'
+                ' and (python_version == "2.7" or python_version == "2.6")]'
+            ),
+            'win_inet_pton',
+        ],
+        {
+            'security': [
+                'pyOpenSSL>=0.14',
+                'cryptography>=1.3.4',
+                'idna>=2.0.0',
+            ],
+            'socks': [
+                'PySocks!=1.5.7,>=1.5.6',
+            ],
+            'socks:sys_platform == "win32" '
+            'and (python_version == "2.7" or python_version == "2.6")': [
+                'win_inet_pton',
+            ],
+        }
+    ),
+    'attrs': (
+        [
+            '[dev]',
+            'coverage',
+            'hypothesis',
+            'pympler',
+            'pytest',
+            'six',
+            'zope.interface',
+            'sphinx',
+            'zope.interface',
+            '[docs]',
+            'sphinx',
+            'zope.interface',
+            '[tests]',
+            'coverage',
+            'hypothesis',
+            'pympler',
+            'pytest',
+            'six',
+            'zope.interface',
+        ],
+        {
+            'dev': [
+                'coverage',
+                'hypothesis',
+                'pympler',
+                'pytest',
+                'six',
+                'zope.interface',
+                'sphinx',
+                'zope.interface',
+            ],
+            'docs': [
+                'sphinx',
+                'zope.interface',
+            ],
+            'tests': [
+                'coverage',
+                'hypothesis',
+                'pympler',
+                'pytest',
+                'six',
+                'zope.interface',
+            ],
+        },
+    ),
+    'misc': (
+        [
+            'chardet',
+            '[:platform_system != "windows"]',
+            'attrs',
+            '[:platform_system == "windows"]',
+            'pytz',
+        ],
+        {
+            ':platform_system != "windows"': [
+                'attrs',
+            ],
+            ':platform_system == "windows"': [
+                'pytz',
+            ],
+        },
+    ),
+}
+
+@pytest.mark.parametrize(
+    'scenarios,expected',
+    list(get_extras_links_scenarios.values()),
+    ids=list(get_extras_links_scenarios.keys()),
+)
+def test_get_extras_links(scenarios, expected):
+    assert PackageFinder.get_extras_links(scenarios) == expected