diff --git a/homeassistant/components/rest/sensor.py b/homeassistant/components/rest/sensor.py
index 41adb855903..b89e96a0f34 100644
--- a/homeassistant/components/rest/sensor.py
+++ b/homeassistant/components/rest/sensor.py
@@ -227,32 +227,33 @@ class RestData:
         self, method, resource, auth, headers, data, verify_ssl, timeout=DEFAULT_TIMEOUT
     ):
         """Initialize the data object."""
-        self._request = requests.Request(
-            method, resource, headers=headers, auth=auth, data=data
-        ).prepare()
+        self._method = method
+        self._resource = resource
+        self._auth = auth
+        self._headers = headers
+        self._request_data = data
         self._verify_ssl = verify_ssl
         self._timeout = timeout
         self.data = None
 
     def set_url(self, url):
         """Set url."""
-        self._request.prepare_url(url, None)
+        self._resource = url
 
     def update(self):
         """Get the latest data from REST service with provided method."""
-        _LOGGER.debug("Updating from %s", self._request.url)
+        _LOGGER.debug("Updating from %s", self._resource)
         try:
-            with requests.Session() as sess:
-                response = sess.send(
-                    self._request, timeout=self._timeout, verify=self._verify_ssl
-                )
-
+            response = requests.request(
+                self._method,
+                self._resource,
+                headers=self._headers,
+                auth=self._auth,
+                data=self._request_data,
+                timeout=self._timeout,
+                verify=self._verify_ssl,
+            )
             self.data = response.text
         except requests.exceptions.RequestException as ex:
-            _LOGGER.error(
-                "Error fetching data: %s from %s failed with %s",
-                self._request,
-                self._request.url,
-                ex,
-            )
+            _LOGGER.error("Error fetching data: %s failed with %s", self._resource, ex)
             self.data = None
diff --git a/tests/components/rest/test_binary_sensor.py b/tests/components/rest/test_binary_sensor.py
index 63a7d3ff273..8993be6a7a1 100644
--- a/tests/components/rest/test_binary_sensor.py
+++ b/tests/components/rest/test_binary_sensor.py
@@ -4,7 +4,7 @@ from pytest import raises
 from unittest.mock import patch, Mock
 
 import requests
-from requests.exceptions import Timeout, MissingSchema
+from requests.exceptions import Timeout
 import requests_mock
 
 from homeassistant.exceptions import PlatformNotReady
@@ -47,7 +47,7 @@ class TestRestBinarySensorSetup(unittest.TestCase):
 
     def test_setup_missing_schema(self):
         """Test setup with resource missing schema."""
-        with pytest.raises(MissingSchema):
+        with pytest.raises(PlatformNotReady):
             rest.setup_platform(
                 self.hass,
                 {"platform": "rest", "resource": "localhost", "method": "GET"},
@@ -60,7 +60,7 @@ class TestRestBinarySensorSetup(unittest.TestCase):
         with raises(PlatformNotReady):
             rest.setup_platform(
                 self.hass,
-                {"platform": "rest", "resource": "http://localhost"},
+                {"platform": "rest", "resource": "http://localhost", "method": "GET"},
                 self.add_devices,
                 None,
             )
@@ -72,7 +72,7 @@ class TestRestBinarySensorSetup(unittest.TestCase):
         with raises(PlatformNotReady):
             rest.setup_platform(
                 self.hass,
-                {"platform": "rest", "resource": "http://localhost"},
+                {"platform": "rest", "resource": "http://localhost", "method": "GET"},
                 self.add_devices,
                 None,
             )
diff --git a/tests/components/rest/test_sensor.py b/tests/components/rest/test_sensor.py
index 50acb053347..c6cfce90a20 100644
--- a/tests/components/rest/test_sensor.py
+++ b/tests/components/rest/test_sensor.py
@@ -4,7 +4,7 @@ from pytest import raises
 from unittest.mock import patch, Mock
 
 import requests
-from requests.exceptions import Timeout, MissingSchema, RequestException
+from requests.exceptions import Timeout, RequestException
 import requests_mock
 
 from homeassistant.exceptions import PlatformNotReady
@@ -37,7 +37,7 @@ class TestRestSensorSetup(unittest.TestCase):
 
     def test_setup_missing_schema(self):
         """Test setup with resource missing schema."""
-        with pytest.raises(MissingSchema):
+        with pytest.raises(PlatformNotReady):
             rest.setup_platform(
                 self.hass,
                 {"platform": "rest", "resource": "localhost", "method": "GET"},
@@ -50,7 +50,7 @@ class TestRestSensorSetup(unittest.TestCase):
         with raises(PlatformNotReady):
             rest.setup_platform(
                 self.hass,
-                {"platform": "rest", "resource": "http://localhost"},
+                {"platform": "rest", "resource": "http://localhost", "method": "GET"},
                 lambda devices, update=True: None,
             )
 
@@ -60,7 +60,7 @@ class TestRestSensorSetup(unittest.TestCase):
         with raises(PlatformNotReady):
             rest.setup_platform(
                 self.hass,
-                {"platform": "rest", "resource": "http://localhost"},
+                {"platform": "rest", "resource": "http://localhost", "method": "GET"},
                 lambda devices, update=True: None,
             )
 
@@ -397,7 +397,7 @@ class TestRestData(unittest.TestCase):
         self.rest.update()
         assert "test data" == self.rest.data
 
-    @patch("requests.Session", side_effect=RequestException)
+    @patch("requests.request", side_effect=RequestException)
     def test_update_request_exception(self, mock_req):
         """Test update when a request exception occurs."""
         self.rest.update()