diff --git a/homeassistant/components/group/cover.py b/homeassistant/components/group/cover.py
index dbb49222bb0..d22184c0922 100644
--- a/homeassistant/components/group/cover.py
+++ b/homeassistant/components/group/cover.py
@@ -17,7 +17,6 @@ from homeassistant.components.cover import (
 )
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
-    ATTR_ASSUMED_STATE,
     ATTR_ENTITY_ID,
     ATTR_SUPPORTED_FEATURES,
     CONF_ENTITIES,
@@ -44,7 +43,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import GroupEntity
-from .util import attribute_equal, reduce_attribute
+from .util import reduce_attribute
 
 KEY_OPEN_CLOSE = "open_close"
 KEY_STOP = "stop"
@@ -116,7 +115,6 @@ class CoverGroup(GroupEntity, CoverEntity):
     _attr_is_opening: bool | None = False
     _attr_is_closing: bool | None = False
     _attr_current_cover_position: int | None = 100
-    _attr_assumed_state: bool = True
 
     def __init__(self, unique_id: str | None, name: str, entities: list[str]) -> None:
         """Initialize a CoverGroup entity."""
@@ -251,8 +249,6 @@ class CoverGroup(GroupEntity, CoverEntity):
     @callback
     def async_update_group_state(self) -> None:
         """Update state and attributes."""
-        self._attr_assumed_state = False
-
         states = [
             state.state
             for entity_id in self._entity_ids
@@ -293,9 +289,6 @@ class CoverGroup(GroupEntity, CoverEntity):
         self._attr_current_cover_position = reduce_attribute(
             position_states, ATTR_CURRENT_POSITION
         )
-        self._attr_assumed_state |= not attribute_equal(
-            position_states, ATTR_CURRENT_POSITION
-        )
 
         tilt_covers = self._tilts[KEY_POSITION]
         all_tilt_states = [self.hass.states.get(x) for x in tilt_covers]
@@ -303,9 +296,6 @@ class CoverGroup(GroupEntity, CoverEntity):
         self._attr_current_cover_tilt_position = reduce_attribute(
             tilt_states, ATTR_CURRENT_TILT_POSITION
         )
-        self._attr_assumed_state |= not attribute_equal(
-            tilt_states, ATTR_CURRENT_TILT_POSITION
-        )
 
         supported_features = CoverEntityFeature(0)
         if self._covers[KEY_OPEN_CLOSE]:
@@ -322,11 +312,3 @@ class CoverGroup(GroupEntity, CoverEntity):
         if self._tilts[KEY_POSITION]:
             supported_features |= CoverEntityFeature.SET_TILT_POSITION
         self._attr_supported_features = supported_features
-
-        if not self._attr_assumed_state:
-            for entity_id in self._entity_ids:
-                if (state := self.hass.states.get(entity_id)) is None:
-                    continue
-                if state and state.attributes.get(ATTR_ASSUMED_STATE):
-                    self._attr_assumed_state = True
-                    break
diff --git a/tests/components/group/test_cover.py b/tests/components/group/test_cover.py
index 84ccba2ff66..4e0ddc19a31 100644
--- a/tests/components/group/test_cover.py
+++ b/tests/components/group/test_cover.py
@@ -346,10 +346,10 @@ async def test_attributes(hass: HomeAssistant, setup_comp) -> None:
     assert state.attributes[ATTR_CURRENT_POSITION] == 70
     assert state.attributes[ATTR_CURRENT_TILT_POSITION] == 60
 
-    # ### Test assumed state ###
+    # ### Test state when group members have different states ###
     # ##########################
 
-    # For covers - assumed state set true if position differ
+    # Covers
     hass.states.async_set(
         DEMO_COVER, STATE_OPEN, {ATTR_SUPPORTED_FEATURES: 4, ATTR_CURRENT_POSITION: 100}
     )
@@ -357,7 +357,7 @@ async def test_attributes(hass: HomeAssistant, setup_comp) -> None:
 
     state = hass.states.get(COVER_GROUP)
     assert state.state == STATE_OPEN
-    assert state.attributes[ATTR_ASSUMED_STATE] is True
+    assert ATTR_ASSUMED_STATE not in state.attributes
     assert state.attributes[ATTR_SUPPORTED_FEATURES] == 244
     assert state.attributes[ATTR_CURRENT_POSITION] == 85  # (70 + 100) / 2
     assert state.attributes[ATTR_CURRENT_TILT_POSITION] == 60
@@ -373,7 +373,7 @@ async def test_attributes(hass: HomeAssistant, setup_comp) -> None:
     assert ATTR_CURRENT_POSITION not in state.attributes
     assert state.attributes[ATTR_CURRENT_TILT_POSITION] == 60
 
-    # For tilts - assumed state set true if tilt position differ
+    # Tilts
     hass.states.async_set(
         DEMO_TILT,
         STATE_OPEN,
@@ -383,7 +383,7 @@ async def test_attributes(hass: HomeAssistant, setup_comp) -> None:
 
     state = hass.states.get(COVER_GROUP)
     assert state.state == STATE_OPEN
-    assert state.attributes[ATTR_ASSUMED_STATE] is True
+    assert ATTR_ASSUMED_STATE not in state.attributes
     assert state.attributes[ATTR_SUPPORTED_FEATURES] == 128
     assert ATTR_CURRENT_POSITION not in state.attributes
     assert state.attributes[ATTR_CURRENT_TILT_POSITION] == 80  # (60 + 100) / 2
@@ -399,11 +399,12 @@ async def test_attributes(hass: HomeAssistant, setup_comp) -> None:
     assert ATTR_CURRENT_POSITION not in state.attributes
     assert ATTR_CURRENT_TILT_POSITION not in state.attributes
 
+    # Group member has set assumed_state
     hass.states.async_set(DEMO_TILT, STATE_CLOSED, {ATTR_ASSUMED_STATE: True})
     await hass.async_block_till_done()
 
     state = hass.states.get(COVER_GROUP)
-    assert state.attributes[ATTR_ASSUMED_STATE] is True
+    assert ATTR_ASSUMED_STATE not in state.attributes
 
     # Test entity registry integration
     entity_registry = er.async_get(hass)