diff --git a/homeassistant/components/onewire/binary_sensor.py b/homeassistant/components/onewire/binary_sensor.py
index e7e30588f8a..5cd3fa65a60 100644
--- a/homeassistant/components/onewire/binary_sensor.py
+++ b/homeassistant/components/onewire/binary_sensor.py
@@ -143,6 +143,8 @@ class OneWireBinarySensor(OneWireEntity, BinarySensorEntity):
     entity_description: OneWireBinarySensorEntityDescription
 
     @property
-    def is_on(self) -> bool:
+    def is_on(self) -> bool | None:
         """Return true if sensor is on."""
+        if self._state is None:
+            return None
         return bool(self._state)
diff --git a/homeassistant/components/onewire/switch.py b/homeassistant/components/onewire/switch.py
index 00a3f8f65f4..c63198ccf05 100644
--- a/homeassistant/components/onewire/switch.py
+++ b/homeassistant/components/onewire/switch.py
@@ -204,8 +204,10 @@ class OneWireSwitch(OneWireEntity, SwitchEntity):
     entity_description: OneWireSwitchEntityDescription
 
     @property
-    def is_on(self) -> bool:
-        """Return true if sensor is on."""
+    def is_on(self) -> bool | None:
+        """Return true if switch is on."""
+        if self._state is None:
+            return None
         return bool(self._state)
 
     def turn_on(self, **kwargs: Any) -> None:
diff --git a/tests/components/onewire/const.py b/tests/components/onewire/const.py
index 3da37a72459..cb9fca54f3d 100644
--- a/tests/components/onewire/const.py
+++ b/tests/components/onewire/const.py
@@ -155,7 +155,9 @@ MOCK_OWPROXY_DEVICES = {
             {ATTR_INJECT_READS: b"    1"},
             {ATTR_INJECT_READS: b"    0"},
             {ATTR_INJECT_READS: b"    0"},
-            {ATTR_INJECT_READS: b"    0"},
+            {
+                ATTR_INJECT_READS: ProtocolError,
+            },
             {ATTR_INJECT_READS: b"    0"},
             {ATTR_INJECT_READS: b"    0"},
             {ATTR_INJECT_READS: b"    0"},
@@ -165,7 +167,9 @@ MOCK_OWPROXY_DEVICES = {
             {ATTR_INJECT_READS: b"    1"},
             {ATTR_INJECT_READS: b"    0"},
             {ATTR_INJECT_READS: b"    1"},
-            {ATTR_INJECT_READS: b"    0"},
+            {
+                ATTR_INJECT_READS: ProtocolError,
+            },
             {ATTR_INJECT_READS: b"    1"},
             {ATTR_INJECT_READS: b"    0"},
             {ATTR_INJECT_READS: b"    1"},
diff --git a/tests/components/onewire/snapshots/test_binary_sensor.ambr b/tests/components/onewire/snapshots/test_binary_sensor.ambr
index 2aa415f0345..0523c969ade 100644
--- a/tests/components/onewire/snapshots/test_binary_sensor.ambr
+++ b/tests/components/onewire/snapshots/test_binary_sensor.ambr
@@ -851,13 +851,13 @@
       'attributes': ReadOnlyDict({
         'device_file': '/29.111111111111/sensed.3',
         'friendly_name': '29.111111111111 Sensed 3',
-        'raw_value': 0.0,
+        'raw_value': None,
       }),
       'context': <ANY>,
       'entity_id': 'binary_sensor.29_111111111111_sensed_3',
       'last_changed': <ANY>,
       'last_updated': <ANY>,
-      'state': 'off',
+      'state': 'unknown',
     }),
     StateSnapshot({
       'attributes': ReadOnlyDict({
diff --git a/tests/components/onewire/snapshots/test_switch.ambr b/tests/components/onewire/snapshots/test_switch.ambr
index 8fbb977948b..4f6498419a9 100644
--- a/tests/components/onewire/snapshots/test_switch.ambr
+++ b/tests/components/onewire/snapshots/test_switch.ambr
@@ -1271,13 +1271,13 @@
       'attributes': ReadOnlyDict({
         'device_file': '/29.111111111111/PIO.3',
         'friendly_name': '29.111111111111 Programmed input-output 3',
-        'raw_value': 0.0,
+        'raw_value': None,
       }),
       'context': <ANY>,
       'entity_id': 'switch.29_111111111111_programmed_input_output_3',
       'last_changed': <ANY>,
       'last_updated': <ANY>,
-      'state': 'off',
+      'state': 'unknown',
     }),
     StateSnapshot({
       'attributes': ReadOnlyDict({