diff --git a/HISTORY.rst b/HISTORY.rst
index 34226f49..7f20389e 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -50,7 +50,7 @@ dev (XXXX)
 - The ``json`` parameter to ``post()`` and friends will now only be used if
   neither ``data`` nor ``files`` are present, consistent with the
   documentation.
-- We now ignore empty fields in the ``NO_PROXY`` enviroment variable.
+- We now ignore empty fields in the ``NO_PROXY`` environment variable.
 - Fixed problem where ``httplib.BadStatusLine`` would get raised if combining
   ``stream=True`` with ``contextlib.closing``.
 - Prevented bugs where we would attempt to return the same connection back to
@@ -533,7 +533,7 @@ This is not a backwards compatible change.
 - Improved mime-compatible JSON handling
 - Proxy fixes
 - Path hack fixes
-- Case-Insensistive Content-Encoding headers
+- Case-Insensitive Content-Encoding headers
 - Support for CJK parameters in form posts
 
 
@@ -620,7 +620,7 @@ This is not a backwards compatible change.
 +++++++++++++++++++
 
 - Removal of Requests.async in favor of `grequests <https://github.com/kennethreitz/grequests>`_
-- Allow disabling of cookie persistiance.
+- Allow disabling of cookie persistence.
 - New implementation of safe_mode
 - cookies.get now supports default argument
 - Session cookies not saved when Session.request is called with return_response=False
diff --git a/requests/cookies.py b/requests/cookies.py
index d097d7db..d61ec2da 100644
--- a/requests/cookies.py
+++ b/requests/cookies.py
@@ -368,7 +368,7 @@ def _copy_cookie_jar(jar):
         return None
 
     if hasattr(jar, 'copy'):
-        # We're dealing with an instane of RequestsCookieJar
+        # We're dealing with an instance of RequestsCookieJar
         return jar.copy()
     # We're dealing with a generic CookieJar instance
     new_jar = copy.copy(jar)
diff --git a/requests/models.py b/requests/models.py
index 639565cf..b01d3487 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -324,7 +324,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
     def prepare_url(self, url, params):
         """Prepares the given HTTP URL."""
         #: Accept objects that have string representations.
-        #: We're unable to blindy call unicode/str functions
+        #: We're unable to blindly call unicode/str functions
         #: as this will include the bytestring indicator (b'')
         #: on python 3.x.
         #: https://github.com/kennethreitz/requests/pull/2238
@@ -631,7 +631,7 @@ class Response(object):
 
     @property
     def is_permanent_redirect(self):
-        """True if this Response one of the permanant versions of redirect"""
+        """True if this Response one of the permanent versions of redirect"""
         return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
 
     @property
diff --git a/requests/sessions.py b/requests/sessions.py
index 12879a5b..6d607459 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -325,7 +325,7 @@ class Session(SessionRedirectMixin):
         #: limit, a :class:`TooManyRedirects` exception is raised.
         self.max_redirects = DEFAULT_REDIRECT_LIMIT
 
-        #: Trust environement settings for proxy configuration, default
+        #: Trust environment settings for proxy configuration, default
         #: authentication and similar.
         self.trust_env = True
 
@@ -634,7 +634,7 @@ class Session(SessionRedirectMixin):
                 'cert': cert}
 
     def get_adapter(self, url):
-        """Returns the appropriate connnection adapter for the given URL."""
+        """Returns the appropriate connection adapter for the given URL."""
         for (prefix, adapter) in self.adapters.items():
 
             if url.lower().startswith(prefix):
diff --git a/test_requests.py b/test_requests.py
index e83cbc44..137edc08 100755
--- a/test_requests.py
+++ b/test_requests.py
@@ -612,7 +612,7 @@ class TestRequests(object):
         assert prep.hooks['response'] != []
         assert prep.hooks['response'] == [hook]
 
-    def test_session_hooks_are_overriden_by_request_hooks(self, httpbin):
+    def test_session_hooks_are_overridden_by_request_hooks(self, httpbin):
         hook1 = lambda x, *args, **kwargs: x
         hook2 = lambda x, *args, **kwargs: x
         assert hook1 is not hook2