diff --git a/homeassistant/components/google/api.py b/homeassistant/components/google/api.py
index 4ed39d1cc146e5..47aa32dcd11cde 100644
--- a/homeassistant/components/google/api.py
+++ b/homeassistant/components/google/api.py
@@ -79,13 +79,6 @@ def __init__(
         self._device_flow_info: DeviceFlowInfo = device_flow_info
         self._exchange_task_unsub: CALLBACK_TYPE | None = None
         self._timeout_unsub: CALLBACK_TYPE | None = None
-        max_timeout = dt.utcnow() + datetime.timedelta(seconds=EXCHANGE_TIMEOUT_SECONDS)
-        # For some reason, oauth.step1_get_device_and_user_codes() returns a datetime
-        # object without tzinfo. For the comparison below to work, it needs one.
-        user_code_expiry = device_flow_info.user_code_expiry.replace(
-            tzinfo=datetime.timezone.utc
-        )
-        self._expiration_time = min(user_code_expiry, max_timeout)
         self._listener: CALLBACK_TYPE | None = None
         self._creds: Credentials | None = None
 
@@ -115,13 +108,21 @@ def creds(self) -> Credentials | None:
     def async_start_exchange(self) -> None:
         """Start the device auth exchange flow polling."""
         _LOGGER.debug("Starting exchange flow")
+        max_timeout = dt.utcnow() + datetime.timedelta(seconds=EXCHANGE_TIMEOUT_SECONDS)
+        # For some reason, oauth.step1_get_device_and_user_codes() returns a datetime
+        # object without tzinfo. For the comparison below to work, it needs one.
+        user_code_expiry = self._device_flow_info.user_code_expiry.replace(
+            tzinfo=datetime.timezone.utc
+        )
+        expiration_time = min(user_code_expiry, max_timeout)
+
         self._exchange_task_unsub = async_track_time_interval(
             self._hass,
             self._async_poll_attempt,
             datetime.timedelta(seconds=self._device_flow_info.interval),
         )
         self._timeout_unsub = async_track_point_in_utc_time(
-            self._hass, self._async_timeout, self._expiration_time
+            self._hass, self._async_timeout, expiration_time
         )
 
     async def _async_poll_attempt(self, now: datetime.datetime) -> None:
diff --git a/tests/components/google/test_config_flow.py b/tests/components/google/test_config_flow.py
index 3d18faae47169c..24ad8a7b76911a 100644
--- a/tests/components/google/test_config_flow.py
+++ b/tests/components/google/test_config_flow.py
@@ -10,6 +10,7 @@
 from aiohttp.client_exceptions import ClientError
 from freezegun.api import FrozenDateTimeFactory
 from oauth2client.client import (
+    DeviceFlowInfo,
     FlowExchangeError,
     OAuth2Credentials,
     OAuth2DeviceCodeError,
@@ -59,10 +60,17 @@ async def mock_code_flow(
 ) -> YieldFixture[Mock]:
     """Fixture for initiating OAuth flow."""
     with patch(
-        "oauth2client.client.OAuth2WebServerFlow.step1_get_device_and_user_codes",
+        "homeassistant.components.google.api.OAuth2WebServerFlow.step1_get_device_and_user_codes",
     ) as mock_flow:
-        mock_flow.return_value.user_code_expiry = utcnow() + code_expiration_delta
-        mock_flow.return_value.interval = CODE_CHECK_INTERVAL
+        mock_flow.return_value = DeviceFlowInfo.FromResponse(
+            {
+                "device_code": "4/4-GMMhmHCXhWEzkobqIHGG_EnNYYsAkukHspeYUk9E8",
+                "user_code": "GQVQ-JKEC",
+                "verification_url": "https://www.google.com/device",
+                "expires_in": code_expiration_delta.total_seconds(),
+                "interval": CODE_CHECK_INTERVAL,
+            }
+        )
         yield mock_flow
 
 
@@ -70,7 +78,8 @@ async def mock_code_flow(
 async def mock_exchange(creds: OAuth2Credentials) -> YieldFixture[Mock]:
     """Fixture for mocking out the exchange for credentials."""
     with patch(
-        "oauth2client.client.OAuth2WebServerFlow.step2_exchange", return_value=creds
+        "homeassistant.components.google.api.OAuth2WebServerFlow.step2_exchange",
+        return_value=creds,
     ) as mock:
         yield mock
 
@@ -108,7 +117,6 @@ async def fire_alarm(hass, point_in_time):
         await hass.async_block_till_done()
 
 
-@pytest.mark.freeze_time("2022-06-03 15:19:59-00:00")
 async def test_full_flow_yaml_creds(
     hass: HomeAssistant,
     mock_code_flow: Mock,
@@ -131,9 +139,8 @@ async def test_full_flow_yaml_creds(
         "homeassistant.components.google.async_setup_entry", return_value=True
     ) as mock_setup:
         # Run one tick to invoke the credential exchange check
-        freezer.tick(CODE_CHECK_ALARM_TIMEDELTA)
-        await fire_alarm(hass, datetime.datetime.utcnow())
-        await hass.async_block_till_done()
+        now = utcnow()
+        await fire_alarm(hass, now + CODE_CHECK_ALARM_TIMEDELTA)
         result = await hass.config_entries.flow.async_configure(
             flow_id=result["flow_id"]
         )
@@ -143,11 +150,12 @@ async def test_full_flow_yaml_creds(
     assert "data" in result
     data = result["data"]
     assert "token" in data
+    assert 0 < data["token"]["expires_in"] <= 60 * 60
     assert (
-        data["token"]["expires_in"]
-        == 60 * 60 - CODE_CHECK_ALARM_TIMEDELTA.total_seconds()
+        datetime.datetime.now().timestamp()
+        <= data["token"]["expires_at"]
+        < (datetime.datetime.now() + datetime.timedelta(days=8)).timestamp()
     )
-    assert data["token"]["expires_at"] == 1654273199.0
     data["token"].pop("expires_at")
     data["token"].pop("expires_in")
     assert data == {
@@ -238,7 +246,7 @@ async def test_code_error(
     assert await component_setup()
 
     with patch(
-        "oauth2client.client.OAuth2WebServerFlow.step1_get_device_and_user_codes",
+        "homeassistant.components.google.api.OAuth2WebServerFlow.step1_get_device_and_user_codes",
         side_effect=OAuth2DeviceCodeError("Test Failure"),
     ):
         result = await hass.config_entries.flow.async_init(
@@ -267,7 +275,7 @@ async def test_expired_after_exchange(
 
     # Fail first attempt then advance clock past exchange timeout
     with patch(
-        "oauth2client.client.OAuth2WebServerFlow.step2_exchange",
+        "homeassistant.components.google.api.OAuth2WebServerFlow.step2_exchange",
         side_effect=FlowExchangeError(),
     ):
         now = utcnow()
@@ -299,7 +307,7 @@ async def test_exchange_error(
     # Run one tick to invoke the credential exchange check
     now = utcnow()
     with patch(
-        "oauth2client.client.OAuth2WebServerFlow.step2_exchange",
+        "homeassistant.components.google.api.OAuth2WebServerFlow.step2_exchange",
         side_effect=FlowExchangeError(),
     ):
         now += CODE_CHECK_ALARM_TIMEDELTA