diff --git a/doc/user_guide/checkers/extensions.rst b/doc/user_guide/checkers/extensions.rst
index 8771ee845c1..ab10941cce7 100644
--- a/doc/user_guide/checkers/extensions.rst
+++ b/doc/user_guide/checkers/extensions.rst
@@ -275,7 +275,7 @@ Verbatim name of the checker is ``dict-init-mutate``.
 
 Dict-Init-Mutate checker Messages
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-:dict-init-mutate (W3301): *Dictionary mutated immediately after initialization*
+:dict-init-mutate (C3301): *Dictionary mutated immediately after initialization*
   Dictionaries can be initialized with a single statement using dictionary
   literal syntax.
 
diff --git a/pylint/extensions/dict_init_mutate.py b/pylint/extensions/dict_init_mutate.py
index ad43b2ee4db..2ce964ce92b 100644
--- a/pylint/extensions/dict_init_mutate.py
+++ b/pylint/extensions/dict_init_mutate.py
@@ -3,20 +3,25 @@
 # Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
 
 """Check for use of dictionary mutation after initialization."""
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
 
 from astroid import nodes
 
 from pylint.checkers import BaseChecker
 from pylint.checkers.utils import only_required_for_messages
 from pylint.interfaces import HIGH
-from pylint.lint.pylinter import PyLinter
+
+if TYPE_CHECKING:
+    from pylint.lint.pylinter import PyLinter
 
 
 class DictInitMutateChecker(BaseChecker):
     name = "dict-init-mutate"
     msgs = {
-        "W3301": (
-            "Dictionary mutated immediately after initialization",
+        "C3301": (
+            "Declare all known key/values when initializing the dictionary.",
             "dict-init-mutate",
             "Dictionaries can be initialized with a single statement "
             "using dictionary literal syntax.",
@@ -37,15 +42,15 @@ def visit_assign(self, node: nodes.Assign) -> None:
         if len(node.targets) != 1 or not isinstance(dict_name, nodes.AssignName):
             return
 
-        next_sibling = node.next_sibling()
+        first_sibling = node.next_sibling()
         if (
-            not next_sibling
-            or not isinstance(next_sibling, nodes.Assign)
-            or len(next_sibling.targets) != 1
+            not first_sibling
+            or not isinstance(first_sibling, nodes.Assign)
+            or len(first_sibling.targets) != 1
         ):
             return
 
-        sibling_target = next_sibling.targets[0]
+        sibling_target = first_sibling.targets[0]
         if not isinstance(sibling_target, nodes.Subscript):
             return
 
diff --git a/tests/functional/ext/dict_init_mutate.py b/tests/functional/ext/dict_init_mutate.py
index 7983639515c..f3372bd7e6c 100644
--- a/tests/functional/ext/dict_init_mutate.py
+++ b/tests/functional/ext/dict_init_mutate.py
@@ -5,16 +5,21 @@
 
 fruits = {}
 for fruit in ["apple", "orange"]:
+    fruits[fruit] = 1
     fruits[fruit] += 1
 
 count = 10
 fruits = {"apple": 1}
 fruits["apple"] += count
 
+config = {}  # [dict-init-mutate]
+config['pwd'] = 'hello'
+
 config = {}  # [dict-init-mutate]
 config['dir'] = 'bin'
 config['user'] = 'me'
 config['workers'] = 5
+print(config)
 
 config = {}  # Not flagging calls to update for now
 config.update({"dir": "bin"})
diff --git a/tests/functional/ext/dict_init_mutate.txt b/tests/functional/ext/dict_init_mutate.txt
index f7a4964afda..c3702491f92 100644
--- a/tests/functional/ext/dict_init_mutate.txt
+++ b/tests/functional/ext/dict_init_mutate.txt
@@ -1,2 +1,3 @@
-dict-init-mutate:14:0:14:11::Dictionary mutated immediately after initialization:HIGH
-dict-init-mutate:22:0:22:11::Dictionary mutated immediately after initialization:HIGH
+dict-init-mutate:15:0:15:11::Declare all known key/values when initializing the dictionary.:HIGH
+dict-init-mutate:18:0:18:11::Declare all known key/values when initializing the dictionary.:HIGH
+dict-init-mutate:27:0:27:11::Declare all known key/values when initializing the dictionary.:HIGH