diff --git a/tests/unit_tests/test_helpers.py b/tests/unit_tests/test_helpers.py
index 7eaa4963c7..3375e34459 100644
--- a/tests/unit_tests/test_helpers.py
+++ b/tests/unit_tests/test_helpers.py
@@ -1124,8 +1124,6 @@ def test_format_duration(seconds: float, expected: str) -> None:
 def test_get_bool_env_common_spellings(
     monkeypatch: pytest.MonkeyPatch, value: str, expected: bool
 ) -> None:
-    """The common on/off spellings parse instead of falling through to
-    bool(str), which read "off" as enabled (e.g. IDF_CCACHE_ENABLE=off
-    left ccache on)."""
+    """The common on/off spellings parse instead of reading as truthy."""
     monkeypatch.setenv("SOME_KNOB", value)
     assert helpers.get_bool_env("SOME_KNOB") is expected