diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py310.txt b/stdlib/@tests/stubtest_allowlists/darwin-py310.txt
index cc1ebe489923..331f922dab66 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py310.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py310.txt
@@ -1,3 +1,11 @@
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.10.18 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =======
 # <= 3.11
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py311.txt b/stdlib/@tests/stubtest_allowlists/darwin-py311.txt
index 77dc5722ae5e..2d8079d43541 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py311.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py311.txt
@@ -8,6 +8,14 @@ fcntl.F_OFD_SETLK
 fcntl.F_OFD_SETLKW
 
 
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.11.13 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =======
 # <= 3.11
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py312.txt b/stdlib/@tests/stubtest_allowlists/darwin-py312.txt
index cfe4e918f56a..c81581eb72b2 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py312.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py312.txt
@@ -8,6 +8,14 @@ fcntl.F_OFD_SETLK
 fcntl.F_OFD_SETLKW
 
 
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.12.11 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =============================================================
 # Allowlist entries that cannot or should not be fixed; <= 3.12
 # =============================================================
diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py39.txt b/stdlib/@tests/stubtest_allowlists/darwin-py39.txt
index e11829830070..59728a27f23c 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py39.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py39.txt
@@ -1,3 +1,11 @@
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.9.23 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =======
 # <= 3.11
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py310.txt b/stdlib/@tests/stubtest_allowlists/win32-py310.txt
index ca56d2f0e687..a49447e799b3 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py310.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py310.txt
@@ -1,3 +1,11 @@
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.10.18 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =======
 # <= 3.11
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py311.txt b/stdlib/@tests/stubtest_allowlists/win32-py311.txt
index fe33c11f3b6c..62c544055dcc 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py311.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py311.txt
@@ -1,3 +1,11 @@
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.11.13 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =======
 # <= 3.11
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py312.txt b/stdlib/@tests/stubtest_allowlists/win32-py312.txt
index 3e5762cbf3d1..1c808d36db4e 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py312.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py312.txt
@@ -16,6 +16,14 @@ _winapi.GetLongPathName
 _winapi.GetShortPathName
 
 
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.12.11 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =============================================================
 # Allowlist entries that cannot or should not be fixed; <= 3.12
 # =============================================================
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py39.txt b/stdlib/@tests/stubtest_allowlists/win32-py39.txt
index 41f8ff3afd8a..ace75c0b6c20 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py39.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py39.txt
@@ -1,3 +1,11 @@
+# =======
+# <= 3.12
+# =======
+
+# Added in Python 3.9.23 (parameter `escapable`)
+html.parser.HTMLParser.set_cdata_mode
+
+
 # =======
 # <= 3.11
 # =======
diff --git a/stdlib/html/parser.pyi b/stdlib/html/parser.pyi
index 8b3fce0010b7..7edd39e8c703 100644
--- a/stdlib/html/parser.pyi
+++ b/stdlib/html/parser.pyi
@@ -1,4 +1,3 @@
-import sys
 from _markupbase import ParserBase
 from re import Pattern
 from typing import Final
@@ -7,9 +6,8 @@ __all__ = ["HTMLParser"]
 
 class HTMLParser(ParserBase):
     CDATA_CONTENT_ELEMENTS: Final[tuple[str, ...]]
-    if sys.version_info >= (3, 13):
-        # Added in 3.13.6
-        RCDATA_CONTENT_ELEMENTS: Final[tuple[str, ...]]
+    # Added in Python 3.9.23, 3.10.18, 3.11.13, 3.12.11, 3.13.6
+    RCDATA_CONTENT_ELEMENTS: Final[tuple[str, ...]]
 
     def __init__(self, *, convert_charrefs: bool = True) -> None: ...
     def feed(self, data: str) -> None: ...
@@ -32,11 +30,8 @@ class HTMLParser(ParserBase):
     def parse_html_declaration(self, i: int) -> int: ...  # undocumented
     def parse_pi(self, i: int) -> int: ...  # undocumented
     def parse_starttag(self, i: int) -> int: ...  # undocumented
-    if sys.version_info >= (3, 13):
-        # `escapable` parameter added in 3.13.6
-        def set_cdata_mode(self, elem: str, *, escapable: bool = False) -> None: ...  # undocumented
-    else:
-        def set_cdata_mode(self, elem: str) -> None: ...  # undocumented
+    # `escapable` parameter added in Python 3.9.23, 3.10.18, 3.11.13, 3.12.11, 3.13.6
+    def set_cdata_mode(self, elem: str, *, escapable: bool = False) -> None: ...  # undocumented
     rawdata: str  # undocumented
     cdata_elem: str | None  # undocumented
     convert_charrefs: bool  # undocumented