diff --git a/maint_tools/test_docstrings.py b/maint_tools/test_docstrings.py
index 69478c846a4a3..295f2598cc78c 100644
--- a/maint_tools/test_docstrings.py
+++ b/maint_tools/test_docstrings.py
@@ -9,7 +9,6 @@
 
 # List of modules ignored when checking for numpydoc validation.
 DOCSTRING_IGNORE_LIST = [
-    "Birch",
     "GammaRegressor",
     "GaussianProcessRegressor",
     "GaussianRandomProjection",
diff --git a/sklearn/cluster/_birch.py b/sklearn/cluster/_birch.py
index 38a57e4130d38..4f0e7200c2734 100644
--- a/sklearn/cluster/_birch.py
+++ b/sklearn/cluster/_birch.py
@@ -480,7 +480,7 @@ def __init__(
     # TODO: Remove in 1.2
     # mypy error: Decorated property not supported
     @deprecated(  # type: ignore
-        "`fit_` is deprecated in 1.0 and will be removed in 1.2"
+        "`fit_` is deprecated in 1.0 and will be removed in 1.2."
     )
     @property
     def fit_(self):
@@ -489,7 +489,7 @@ def fit_(self):
     # TODO: Remove in 1.2
     # mypy error: Decorated property not supported
     @deprecated(  # type: ignore
-        "`partial_fit_` is deprecated in 1.0 and will be removed in 1.2"
+        "`partial_fit_` is deprecated in 1.0 and will be removed in 1.2."
     )
     @property
     def partial_fit_(self):