diff --git a/doc/data/messages/i/invalid-bool-returned/bad.py b/doc/data/messages/i/invalid-bool-returned/bad.py
new file mode 100644
index 0000000000..8e2df42d94
--- /dev/null
+++ b/doc/data/messages/i/invalid-bool-returned/bad.py
@@ -0,0 +1,5 @@
+class BadBool:
+    """__bool__ returns an int"""
+
+    def __bool__(self):  # [invalid-bool-returned]
+        return 1
diff --git a/doc/data/messages/i/invalid-bool-returned/details.rst b/doc/data/messages/i/invalid-bool-returned/details.rst
deleted file mode 100644
index ab82045295..0000000000
--- a/doc/data/messages/i/invalid-bool-returned/details.rst
+++ /dev/null
@@ -1 +0,0 @@
-You can help us make the doc better `by contributing <https://github.com/PyCQA/pylint/issues/5953>`_ !
diff --git a/doc/data/messages/i/invalid-bool-returned/good.py b/doc/data/messages/i/invalid-bool-returned/good.py
index c40beb573f..33e00c0e3c 100644
--- a/doc/data/messages/i/invalid-bool-returned/good.py
+++ b/doc/data/messages/i/invalid-bool-returned/good.py
@@ -1 +1,5 @@
-# This is a placeholder for correct code for this message.
+class GoodBool:
+    """__bool__ returns `bool`"""
+
+    def __bool__(self):
+        return True
diff --git a/doc/data/messages/i/invalid-bytes-returned/bad.py b/doc/data/messages/i/invalid-bytes-returned/bad.py
new file mode 100644
index 0000000000..5068c85f99
--- /dev/null
+++ b/doc/data/messages/i/invalid-bytes-returned/bad.py
@@ -0,0 +1,5 @@
+class BadBytes:
+    """__bytes__ returns <type 'str'>"""
+
+    def __bytes__(self):  # [invalid-bytes-returned]
+        return "123"
diff --git a/doc/data/messages/i/invalid-bytes-returned/details.rst b/doc/data/messages/i/invalid-bytes-returned/details.rst
deleted file mode 100644
index ab82045295..0000000000
--- a/doc/data/messages/i/invalid-bytes-returned/details.rst
+++ /dev/null
@@ -1 +0,0 @@
-You can help us make the doc better `by contributing <https://github.com/PyCQA/pylint/issues/5953>`_ !
diff --git a/doc/data/messages/i/invalid-bytes-returned/good.py b/doc/data/messages/i/invalid-bytes-returned/good.py
index c40beb573f..3bc95489f3 100644
--- a/doc/data/messages/i/invalid-bytes-returned/good.py
+++ b/doc/data/messages/i/invalid-bytes-returned/good.py
@@ -1 +1,5 @@
-# This is a placeholder for correct code for this message.
+class GoodBytes:
+    """__bytes__ returns <type 'bytes'>"""
+
+    def __bytes__(self):
+        return b"some bytes"
diff --git a/doc/data/messages/i/invalid-hash-returned/bad.py b/doc/data/messages/i/invalid-hash-returned/bad.py
new file mode 100644
index 0000000000..ef0a9cb3f3
--- /dev/null
+++ b/doc/data/messages/i/invalid-hash-returned/bad.py
@@ -0,0 +1,5 @@
+class BadHash:
+    """__hash__ returns dict"""
+
+    def __hash__(self):  # [invalid-hash-returned]
+        return {}
diff --git a/doc/data/messages/i/invalid-hash-returned/details.rst b/doc/data/messages/i/invalid-hash-returned/details.rst
deleted file mode 100644
index ab82045295..0000000000
--- a/doc/data/messages/i/invalid-hash-returned/details.rst
+++ /dev/null
@@ -1 +0,0 @@
-You can help us make the doc better `by contributing <https://github.com/PyCQA/pylint/issues/5953>`_ !
diff --git a/doc/data/messages/i/invalid-hash-returned/good.py b/doc/data/messages/i/invalid-hash-returned/good.py
index c40beb573f..c912bf5a49 100644
--- a/doc/data/messages/i/invalid-hash-returned/good.py
+++ b/doc/data/messages/i/invalid-hash-returned/good.py
@@ -1 +1,5 @@
-# This is a placeholder for correct code for this message.
+class GoodHash:
+    """__hash__ returns `int`"""
+
+    def __hash__(self):
+        return 19
diff --git a/doc/data/messages/i/invalid-index-returned/bad.py b/doc/data/messages/i/invalid-index-returned/bad.py
new file mode 100644
index 0000000000..197de0104e
--- /dev/null
+++ b/doc/data/messages/i/invalid-index-returned/bad.py
@@ -0,0 +1,5 @@
+class BadIndex:
+    """__index__ returns a dict"""
+
+    def __index__(self):  # [invalid-index-returned]
+        return {"19": "19"}
diff --git a/doc/data/messages/i/invalid-index-returned/details.rst b/doc/data/messages/i/invalid-index-returned/details.rst
deleted file mode 100644
index ab82045295..0000000000
--- a/doc/data/messages/i/invalid-index-returned/details.rst
+++ /dev/null
@@ -1 +0,0 @@
-You can help us make the doc better `by contributing <https://github.com/PyCQA/pylint/issues/5953>`_ !
diff --git a/doc/data/messages/i/invalid-index-returned/good.py b/doc/data/messages/i/invalid-index-returned/good.py
index c40beb573f..3455ac2780 100644
--- a/doc/data/messages/i/invalid-index-returned/good.py
+++ b/doc/data/messages/i/invalid-index-returned/good.py
@@ -1 +1,5 @@
-# This is a placeholder for correct code for this message.
+class GoodIndex:
+    """__index__ returns <type 'int'>"""
+
+    def __index__(self):
+        return 19