diff --git a/tests/test_devices.py b/tests/test_devices.py
index 4f6bb939..c47fb9d1 100644
--- a/tests/test_devices.py
+++ b/tests/test_devices.py
@@ -560,7 +560,7 @@ async def test_set(ecomax: EcoMAX, messages: dict[FrameType, bytearray]) -> None
 async def test_turn_on(ecomax: EcoMAX, caplog) -> None:
     """Test turning the controller on."""
     assert not await ecomax.turn_on()
-    assert "ecoMAX control is not available" in caplog.text
+    assert "ecoMAX control isn't available" in caplog.text
     ecomax.data[ATTR_ECOMAX_CONTROL] = AsyncMock()
     assert await ecomax.turn_on()
     ecomax.data[ATTR_ECOMAX_CONTROL].turn_on.assert_awaited_once()
@@ -569,7 +569,7 @@ async def test_turn_on(ecomax: EcoMAX, caplog) -> None:
 async def test_turn_off(ecomax: EcoMAX, caplog) -> None:
     """Test turning the controller off."""
     await ecomax.turn_off()
-    assert "ecoMAX control is not available" in caplog.text
+    assert "ecoMAX control isn't available" in caplog.text
     ecomax.data[ATTR_ECOMAX_CONTROL] = AsyncMock()
     await ecomax.turn_off()
     ecomax.data[ATTR_ECOMAX_CONTROL].turn_off.assert_awaited_once()