diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index faf326d9164e1b..d1c1da3be5ca20 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -1,7 +1,8 @@
 import unittest
 from test import support
 from test.support import (
-    is_apple, os_helper, refleak_helper, socket_helper, threading_helper
+    is_apple, os_helper, refleak_helper, socket_helper, threading_helper,
+    warnings_helper,
 )
 import _thread as thread
 import array
@@ -198,6 +199,16 @@ def socket_setdefaulttimeout(timeout):
         socket.setdefaulttimeout(old_timeout)
 
 
+@contextlib.contextmanager
+def catch_malformed_data_warning(quiet=True):
+    # This warning happens on macos and win, but does not always happen on linux.
+    with warnings_helper.check_warnings(
+        ("received malformed or improperly-truncated ancillary data", RuntimeWarning),
+        quiet=quiet,
+    ):
+        yield
+
+
 HAVE_SOCKET_CAN = _have_socket_can()
 
 HAVE_SOCKET_CAN_ISOTP = _have_socket_can_isotp()
@@ -3946,8 +3957,9 @@ def checkTruncatedArray(self, ancbuf, maxdata, mindata=0):
         # mindata and maxdata bytes when received with buffer size
         # ancbuf, and that any complete file descriptor numbers are
         # valid.
-        msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock,
-                                                   len(MSG), ancbuf)
+        with catch_malformed_data_warning():
+            msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock,
+                                                    len(MSG), ancbuf)
         self.assertEqual(msg, MSG)
         self.checkRecvmsgAddress(addr, self.cli_addr)
         self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC)
@@ -4298,8 +4310,9 @@ def testSingleCmsgTruncInData(self):
         self.serv_sock.setsockopt(socket.IPPROTO_IPV6,
                                   socket.IPV6_RECVHOPLIMIT, 1)
         self.misc_event.set()
-        msg, ancdata, flags, addr = self.doRecvmsg(
-            self.serv_sock, len(MSG), socket.CMSG_LEN(SIZEOF_INT) - 1)
+        with catch_malformed_data_warning():
+            msg, ancdata, flags, addr = self.doRecvmsg(
+                self.serv_sock, len(MSG), socket.CMSG_LEN(SIZEOF_INT) - 1)
 
         self.assertEqual(msg, MSG)
         self.checkRecvmsgAddress(addr, self.cli_addr)
@@ -4402,9 +4415,10 @@ def testSecondCmsgTruncInData(self):
         self.serv_sock.setsockopt(socket.IPPROTO_IPV6,
                                   socket.IPV6_RECVTCLASS, 1)
         self.misc_event.set()
-        msg, ancdata, flags, addr = self.doRecvmsg(
-            self.serv_sock, len(MSG),
-            socket.CMSG_SPACE(SIZEOF_INT) + socket.CMSG_LEN(SIZEOF_INT) - 1)
+        with catch_malformed_data_warning():
+            msg, ancdata, flags, addr = self.doRecvmsg(
+                self.serv_sock, len(MSG),
+                socket.CMSG_SPACE(SIZEOF_INT) + socket.CMSG_LEN(SIZEOF_INT) - 1)
 
         self.assertEqual(msg, MSG)
         self.checkRecvmsgAddress(addr, self.cli_addr)