diff --git a/sklearn/tests/test_docstrings.py b/sklearn/tests/test_docstrings.py
index 4f768ffb61812..8bc1afa5fefb8 100644
--- a/sklearn/tests/test_docstrings.py
+++ b/sklearn/tests/test_docstrings.py
@@ -161,7 +161,6 @@
     "sklearn.utils.sparsefuncs.min_max_axis",
     "sklearn.utils.validation.check_is_fitted",
     "sklearn.utils.validation.check_memory",
-    "sklearn.utils.validation.check_random_state",
 ]
 FUNCTION_DOCSTRING_IGNORE_LIST = set(FUNCTION_DOCSTRING_IGNORE_LIST)
 
diff --git a/sklearn/utils/validation.py b/sklearn/utils/validation.py
index e8862ca76edda..49cb4d52d2933 100644
--- a/sklearn/utils/validation.py
+++ b/sklearn/utils/validation.py
@@ -1156,7 +1156,7 @@ def column_or_1d(y, *, warn=False):
 
 
 def check_random_state(seed):
-    """Turn seed into a np.random.RandomState instance
+    """Turn seed into a np.random.RandomState instance.
 
     Parameters
     ----------
@@ -1165,6 +1165,11 @@ def check_random_state(seed):
         If seed is an int, return a new RandomState instance seeded with seed.
         If seed is already a RandomState instance, return it.
         Otherwise raise ValueError.
+
+    Returns
+    -------
+    None
+        No returns.
     """
     if seed is None or seed is np.random:
         return np.random.mtrand._rand