diff --git a/net/test/xfrm.py b/net/test/xfrm.py
index 3d003b6..eae3d4f 100755
--- a/net/test/xfrm.py
+++ b/net/test/xfrm.py
@@ -224,7 +224,7 @@
 EspHdr = cstruct.Struct("EspHdr", "!II", "spi seqnum")
 
 # Local constants.
-_DEFAULT_REPLAY_WINDOW = 4
+_DEFAULT_REPLAY_WINDOW = 32
 ALL_ALGORITHMS = 0xffffffff
 
 # Policy-SA match method (for VTI/XFRM-I).
diff --git a/net/test/xfrm_test.py b/net/test/xfrm_test.py
index 4c5bff5..2289d4d 100755
--- a/net/test/xfrm_test.py
+++ b/net/test/xfrm_test.py
@@ -77,7 +77,7 @@
     expected = (
         "src :: dst 2001:4860:4860::8888\n"
         "\tproto esp spi 0x00001234 reqid 3320 mode transport\n"
-        "\treplay-window 4 \n"
+        "\treplay-window 32 \n"
         "\tauth-trunc hmac(sha1) 0x%s 96\n"
         "\tenc cbc(aes) 0x%s\n"
         "\tsel src ::/0 dst ::/0 \n" % (