--- /dev/null
+diff --git a/responses.py b/responses.py
+index 9c57301..83fef83 100644
+--- a/responses.py
++++ b/responses.py
+@@ -23,6 +23,10 @@
+ from requests.packages.urllib3.response import HTTPResponse
+ except ImportError:
+ from urllib3.response import HTTPResponse
++try:
++ from requests.packages.urllib3.connection import HTTPHeaderDict
++except ImportError:
++ from urllib3.connection import HTTPHeaderDict
+
+ if six.PY2:
+ from urlparse import urlparse, parse_qsl, urlsplit, urlunsplit
+@@ -309,11 +313,11 @@ def _url_matches(self, url, other, match_querystring=False):
+ return False
+
+ def get_headers(self):
+- headers = {}
++ headers = HTTPHeaderDict() # Duplicate headers are legal
+ if self.content_type is not None:
+ headers["Content-Type"] = self.content_type
+ if self.headers:
+- headers.update(self.headers)
++ headers.extend(self.headers)
+ return headers
+
+ def get_response(self, request):
+@@ -372,11 +376,20 @@ def get_response(self, request):
+ status = self.status
+ body = _handle_body(self.body)
+
++ # The requests library's cookie handling depends on the response object
++ # having an original response object with the headers as the `msg`, so
++ # we give it what it needs.
++ orig_response = HTTPResponse(
++ body=body, # required to avoid "ValueError: Unable to determine whether fp is closed."
++ msg=headers,
++ preload_content=False,
++ )
+ return HTTPResponse(
+ status=status,
+ reason=six.moves.http_client.responses.get(status),
+ body=body,
+ headers=headers,
++ original_response=orig_response,
+ preload_content=False,
+ )
+
+@@ -402,13 +415,22 @@ def get_response(self, request):
+ raise body
+
+ body = _handle_body(body)
+- headers.update(r_headers)
+-
++ headers.extend(r_headers)
++
++ # The requests library's cookie handling depends on the response object
++ # having an original response object with the headers as the `msg`, so
++ # we give it what it needs.
++ orig_response = HTTPResponse(
++ body=body, # required to avoid "ValueError: Unable to determine whether fp is closed."
++ msg=headers,
++ preload_content=False,
++ )
+ return HTTPResponse(
+ status=status,
+ reason=six.moves.http_client.responses.get(status),
+ body=body,
+ headers=headers,
++ original_response=orig_response,
+ preload_content=False,
+ )
+
+@@ -619,11 +641,6 @@ def _on_request(self, adapter, request, **kwargs):
+ if not match.stream:
+ response.content # NOQA
+
+- try:
+- response.cookies = _cookies_from_headers(response.headers)
+- except (KeyError, TypeError):
+- pass
+-
+ response = resp_callback(response) if resp_callback else response
+ match.call_count += 1
+ self._calls.add(request, response)
+diff --git a/test_responses.py b/test_responses.py
+index c2a4f01..65904de 100644
+--- a/test_responses.py
++++ b/test_responses.py
+@@ -657,8 +657,56 @@ def run():
+ assert resp.status_code == status
+ assert "session_id" in resp.cookies
+ assert resp.cookies["session_id"] == "12345"
+- assert resp.cookies["a"] == "b"
+- assert resp.cookies["c"] == "d"
++ assert set(resp.cookies.keys()) == set(["session_id"])
++
++ run()
++ assert_reset()
++
++
++def test_response_secure_cookies():
++ body = b"test callback"
++ status = 200
++ headers = {"set-cookie": "session_id=12345; a=b; c=d; secure"}
++ url = "http://example.com/"
++
++ def request_callback(request):
++ return (status, headers, body)
++
++ @responses.activate
++ def run():
++ responses.add_callback(responses.GET, url, request_callback)
++ resp = requests.get(url)
++ assert resp.text == "test callback"
++ assert resp.status_code == status
++ assert "session_id" in resp.cookies
++ assert resp.cookies["session_id"] == "12345"
++ assert set(resp.cookies.keys()) == set(["session_id"])
++
++ run()
++ assert_reset()
++
++
++def test_response_cookies_multiple():
++ body = b"test callback"
++ status = 200
++ headers = [
++ ("set-cookie", "1P_JAR=2019-12-31-23; path=/; domain=.example.com; HttpOnly"),
++ ("set-cookie", "NID=some=value; path=/; domain=.example.com; secure"),
++ ]
++ url = "http://example.com/"
++
++ def request_callback(request):
++ return (status, headers, body)
++
++ @responses.activate
++ def run():
++ responses.add_callback(responses.GET, url, request_callback)
++ resp = requests.get(url)
++ assert resp.text == "test callback"
++ assert resp.status_code == status
++ assert set(resp.cookies.keys()) == set(["1P_JAR", "NID"])
++ assert resp.cookies["1P_JAR"] == "2019-12-31-23"
++ assert resp.cookies["NID"] == "some=value"
+
+ run()
+ assert_reset()