diff --git a/stdlib/unicodedata.pyi b/stdlib/unicodedata.pyi
index aec8867df..7337ab878 100644
--- a/stdlib/unicodedata.pyi
+++ b/stdlib/unicodedata.pyi
@@ -38,6 +38,9 @@ class UCD:
     def decomposition(self, __chr: str) -> str: ...
     def digit(self, __chr: str, __default: _T = ...) -> int | _T: ...
     def east_asian_width(self, __chr: str) -> str: ...
+    if sys.version_info >= (3, 8):
+        def is_normalized(self, __form: str, __unistr: str) -> bool: ...
+
     def lookup(self, __name: str | bytes) -> str: ...
     def mirrored(self, __chr: str) -> int: ...
     def name(self, __chr: str, __default: _T = ...) -> str | _T: ...
diff --git a/tests/stubtest_allowlists/py310.txt b/tests/stubtest_allowlists/py310.txt
index e6bc74afc..e2463fee2 100644
--- a/tests/stubtest_allowlists/py310.txt
+++ b/tests/stubtest_allowlists/py310.txt
@@ -91,7 +91,6 @@ multiprocessing.managers.SharedMemoryServer.release_segment
 multiprocessing.managers.SharedMemoryServer.shutdown
 multiprocessing.managers.SharedMemoryServer.track_segment
 typing._SpecialForm.__call__
-unicodedata.UCD.is_normalized
 
 # ==========
 # Related to positional-only arguments
diff --git a/tests/stubtest_allowlists/py311.txt b/tests/stubtest_allowlists/py311.txt
index a8e210521..9bb3ebc72 100644
--- a/tests/stubtest_allowlists/py311.txt
+++ b/tests/stubtest_allowlists/py311.txt
@@ -87,7 +87,6 @@ typing.NewType.__mro_entries__
 typing.ParamSpec.__typing_subst__
 typing.TypeVar.__typing_subst__
 typing.TypeVarTuple.__typing_subst__
-unicodedata.UCD.is_normalized
 unittest.TestCase._addSkip
 unittest.case.TestCase._addSkip
 unittest.doModuleCleanups
diff --git a/tests/stubtest_allowlists/py38.txt b/tests/stubtest_allowlists/py38.txt
index 947cd504e..8f0c38ae1 100644
--- a/tests/stubtest_allowlists/py38.txt
+++ b/tests/stubtest_allowlists/py38.txt
@@ -147,7 +147,6 @@ tkinter.filedialog.wantobjects
 tkinter.simpledialog.wantobjects
 tkinter.tix.wantobjects
 typing._SpecialForm.__call__
-unicodedata.UCD.is_normalized
 
 # ==========
 # Allowlist entries that cannot or should not be fixed
diff --git a/tests/stubtest_allowlists/py39.txt b/tests/stubtest_allowlists/py39.txt
index 6acb7a3eb..ade8dc291 100644
--- a/tests/stubtest_allowlists/py39.txt
+++ b/tests/stubtest_allowlists/py39.txt
@@ -132,7 +132,6 @@ stringprep.unicodedata  # re-exported from unicodedata
 types.GenericAlias.__mro_entries__
 typing._SpecialForm.__call__
 typing._SpecialForm.__mro_entries__
-unicodedata.UCD.is_normalized
 
 # SpooledTemporaryFile implements IO except these methods before Python 3.11
 # See also https://github.com/python/typeshed/pull/2452#issuecomment-420657918