diff --git a/ext/snmp/tests/bug64124.phpt b/ext/snmp/tests/bug64124.phpt
index 4fbf80f0400a..5e2c43dc6ada 100644
--- a/ext/snmp/tests/bug64124.phpt
+++ b/ext/snmp/tests/bug64124.phpt
@@ -13,6 +13,8 @@ if (@inet_ntop($packed) === false) {
     die("skip no IPv6 support");
 }
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/bug64159.phpt b/ext/snmp/tests/bug64159.phpt
index 622cb1ce019d..1df12b708875 100644
--- a/ext/snmp/tests/bug64159.phpt
+++ b/ext/snmp/tests/bug64159.phpt
@@ -10,6 +10,8 @@ require_once(__DIR__.'/skipif.inc');
 ?>
 --ENV--
 MIBS=noneXistent
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/generic_timeout_error.phpt b/ext/snmp/tests/generic_timeout_error.phpt
index 6cad7e9901cb..db0b4c52b89f 100644
--- a/ext/snmp/tests/generic_timeout_error.phpt
+++ b/ext/snmp/tests/generic_timeout_error.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/ipv6.phpt b/ext/snmp/tests/ipv6.phpt
index 93274fd7054f..e88c7bdb8afe 100644
--- a/ext/snmp/tests/ipv6.phpt
+++ b/ext/snmp/tests/ipv6.phpt
@@ -13,6 +13,8 @@ if (@inet_ntop($packed) === false) {
     die("skip no IPv6 support");
 }
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp-object-errno-errstr.phpt b/ext/snmp/tests/snmp-object-errno-errstr.phpt
index d6757111b020..ae279cd4e652 100644
--- a/ext/snmp/tests/snmp-object-errno-errstr.phpt
+++ b/ext/snmp/tests/snmp-object-errno-errstr.phpt
@@ -9,6 +9,8 @@ snmp
 require_once(__DIR__.'/skipif.inc');
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp-object.phpt b/ext/snmp/tests/snmp-object.phpt
index 13461675cc80..1a9ce63fc6c2 100644
--- a/ext/snmp/tests/snmp-object.phpt
+++ b/ext/snmp/tests/snmp-object.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp2_get.phpt b/ext/snmp/tests/snmp2_get.phpt
index e2cd1ef1b459..1721493408aa 100644
--- a/ext/snmp/tests/snmp2_get.phpt
+++ b/ext/snmp/tests/snmp2_get.phpt
@@ -9,6 +9,8 @@ snmp
 require_once(__DIR__.'/skipif.inc');
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp2_getnext.phpt b/ext/snmp/tests/snmp2_getnext.phpt
index c428783b79f7..ea73c52f77b4 100644
--- a/ext/snmp/tests/snmp2_getnext.phpt
+++ b/ext/snmp/tests/snmp2_getnext.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp2_real_walk.phpt b/ext/snmp/tests/snmp2_real_walk.phpt
index 91c337f6d67a..32c72ea3f924 100644
--- a/ext/snmp/tests/snmp2_real_walk.phpt
+++ b/ext/snmp/tests/snmp2_real_walk.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp2_set-nomib.phpt b/ext/snmp/tests/snmp2_set-nomib.phpt
index 4fbcc2098f73..171c2f2a50ef 100644
--- a/ext/snmp/tests/snmp2_set-nomib.phpt
+++ b/ext/snmp/tests/snmp2_set-nomib.phpt
@@ -11,6 +11,8 @@ if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
 --ENV--
 MIBS=
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp2_set.phpt b/ext/snmp/tests/snmp2_set.phpt
index da94fe21f498..5782ac3b86bf 100644
--- a/ext/snmp/tests/snmp2_set.phpt
+++ b/ext/snmp/tests/snmp2_set.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp2_walk.phpt b/ext/snmp/tests/snmp2_walk.phpt
index fcf14424ca05..362db1fa3cbd 100644
--- a/ext/snmp/tests/snmp2_walk.phpt
+++ b/ext/snmp/tests/snmp2_walk.phpt
@@ -9,6 +9,8 @@ snmp
 require_once(__DIR__.'/skipif.inc');
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp3-error.phpt b/ext/snmp/tests/snmp3-error.phpt
index 27cba5b48416..6463af87a3b9 100644
--- a/ext/snmp/tests/snmp3-error.phpt
+++ b/ext/snmp/tests/snmp3-error.phpt
@@ -9,6 +9,8 @@ snmp
 require_once(__DIR__.'/skipif.inc');
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp3.phpt b/ext/snmp/tests/snmp3.phpt
index 1d12a84f4647..c689865bf052 100644
--- a/ext/snmp/tests/snmp3.phpt
+++ b/ext/snmp/tests/snmp3.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmp_getvalue.phpt b/ext/snmp/tests/snmp_getvalue.phpt
index 6b9326fa0cca..2c3bac572325 100644
--- a/ext/snmp/tests/snmp_getvalue.phpt
+++ b/ext/snmp/tests/snmp_getvalue.phpt
@@ -7,9 +7,10 @@ snmp
 --SKIPIF--
 <?php
 require_once(__DIR__.'/skipif.inc');
-if (PHP_OS_FAMILY === "Windows") die("xfail fails on Windows for unknown reasons");
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmpget.phpt b/ext/snmp/tests/snmpget.phpt
index ea7924ed8e57..9e0d38541597 100644
--- a/ext/snmp/tests/snmpget.phpt
+++ b/ext/snmp/tests/snmpget.phpt
@@ -9,6 +9,8 @@ snmp
 require_once(__DIR__.'/skipif.inc');
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmpgetnext.phpt b/ext/snmp/tests/snmpgetnext.phpt
index 995a4cc987f5..a02dfcc7b55c 100644
--- a/ext/snmp/tests/snmpgetnext.phpt
+++ b/ext/snmp/tests/snmpgetnext.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmprealwalk.phpt b/ext/snmp/tests/snmprealwalk.phpt
index 66f458dadffa..0ccaf3635c41 100644
--- a/ext/snmp/tests/snmprealwalk.phpt
+++ b/ext/snmp/tests/snmprealwalk.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmpset-nomib.phpt b/ext/snmp/tests/snmpset-nomib.phpt
index e5b5bfb9f85a..9a2c64a9aa0c 100644
--- a/ext/snmp/tests/snmpset-nomib.phpt
+++ b/ext/snmp/tests/snmpset-nomib.phpt
@@ -11,6 +11,8 @@ if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
 --ENV--
 MIBS=
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmpset.phpt b/ext/snmp/tests/snmpset.phpt
index a4f89e78da93..02f3ca6693a2 100644
--- a/ext/snmp/tests/snmpset.phpt
+++ b/ext/snmp/tests/snmpset.phpt
@@ -8,6 +8,8 @@ snmp
 <?php
 require_once(__DIR__.'/skipif.inc');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');
diff --git a/ext/snmp/tests/snmpwalk.phpt b/ext/snmp/tests/snmpwalk.phpt
index 61ef33a70a29..bc1e4c37385d 100644
--- a/ext/snmp/tests/snmpwalk.phpt
+++ b/ext/snmp/tests/snmpwalk.phpt
@@ -9,6 +9,8 @@ snmp
 require_once(__DIR__.'/skipif.inc');
 if (getenv('SKIP_ASAN')) die('skip Timeouts under ASAN');
 ?>
+--XFAIL--
+SNMP tests might possibly fail on Windows
 --FILE--
 <?php
 require_once(__DIR__.'/snmp_include.inc');