diff --git a/ext/posix/tests/posix_getgrgid_basic.phpt b/ext/posix/tests/posix_getgrgid_basic.phpt
index 6b0daa5e940..392e81d491d 100644
--- a/ext/posix/tests/posix_getgrgid_basic.phpt
+++ b/ext/posix/tests/posix_getgrgid_basic.phpt
@@ -17,7 +17,7 @@ Basic test of POSIX getgid and getgrid functions
 Array
 (
     [name] => %s
-    [passwd] => %a
+    [passwd] => %A
     [members] => Array
 %a
 
diff --git a/ext/posix/tests/posix_getgrnam_basic.phpt b/ext/posix/tests/posix_getgrnam_basic.phpt
index 5203d1ea0f0..acf8f4473e5 100644
--- a/ext/posix/tests/posix_getgrnam_basic.phpt
+++ b/ext/posix/tests/posix_getgrnam_basic.phpt
@@ -20,7 +20,7 @@ array(4) {
   ["name"]=>
   string(%d) "%s"
   ["passwd"]=>
-  string(1) "%s"
+  string(%d) "%S"
   ["members"]=>
 %a
   ["gid"]=>