diff --git a/doc/data/messages/i/invalid-slots-object/bad.py b/doc/data/messages/i/invalid-slots-object/bad.py
new file mode 100644
index 0000000000..41baaa54f4
--- /dev/null
+++ b/doc/data/messages/i/invalid-slots-object/bad.py
@@ -0,0 +1,2 @@
+class Person:
+    __slots__ = ('name', 3)  # [invalid-slots-object]
diff --git a/doc/data/messages/i/invalid-slots-object/good.py b/doc/data/messages/i/invalid-slots-object/good.py
new file mode 100644
index 0000000000..e8eec69491
--- /dev/null
+++ b/doc/data/messages/i/invalid-slots-object/good.py
@@ -0,0 +1,2 @@
+class Person:
+    __slots__ = ('name', 'surname')
diff --git a/doc/data/messages/i/invalid-slots-object/related.rst b/doc/data/messages/i/invalid-slots-object/related.rst
new file mode 100644
index 0000000000..15c738498d
--- /dev/null
+++ b/doc/data/messages/i/invalid-slots-object/related.rst
@@ -0,0 +1 @@
+- `Documentation for __slots__ <https://docs.python.org/3/reference/datamodel.html#slots>`_