diff --git a/src/textual/getters.py b/src/textual/getters.py
index f5b23590b0..6cb54caf31 100644
--- a/src/textual/getters.py
+++ b/src/textual/getters.py
@@ -178,11 +178,11 @@ def __get__(
             return self
         child = obj._nodes._get_by_id(self.child_id)
         if child is None:
-            raise NoMatches(f"No child found with id={id!r}")
+            raise NoMatches(f"No child found with id={self.child_id!r}")
         if not isinstance(child, self.expect_type):
             if not isinstance(child, self.expect_type):
                 raise WrongType(
-                    f"Child with id={id!r} is wrong type; expected {self.expect_type}, got"
+                    f"Child with id={self.child_id!r} is wrong type; expected {self.expect_type}, got"
                     f" {type(child)}"
                 )
         return child
diff --git a/tests/test_getters.py b/tests/test_getters.py
index 4ccfbf85e1..f92173e94c 100644
--- a/tests/test_getters.py
+++ b/tests/test_getters.py
@@ -7,7 +7,7 @@
 from textual.widgets import Input, Label
 
 
-async def get_getters() -> None:
+async def test_getters() -> None:
     """Check the getter descriptors work, and return expected errors."""
 
     class QueryApp(App):
@@ -20,8 +20,8 @@ class QueryApp(App):
 
         def compose(self) -> ComposeResult:
             with containers.Vertical():
-                yield Label(id="label1", classes=".red")
-            yield Label(id="label2", classes=".green")
+                yield Label(id="label1", classes="red")
+            yield Label(id="label2", classes="green")
 
     app = QueryApp()
     async with app.run_test():