diff --git a/ext/standard/tests/network/gethostbynamel_error.phpt b/ext/standard/tests/network/gethostbynamel_error.phpt
index 21e09096518..4a13bf021f3 100644
--- a/ext/standard/tests/network/gethostbynamel_error.phpt
+++ b/ext/standard/tests/network/gethostbynamel_error.phpt
@@ -21,7 +21,7 @@ $extra_arg = 10;
 var_dump( gethostbynamel($hostname, $extra_arg) );
 
 echo "\n-- Testing gethostbynamel() with an unknown host --\n";
-$hostname = 'unknownhost_zzz_xxx_yyy';
+$hostname = 'unknownhost_zzz_xxx_yyy.';
 var_dump( gethostbynamel($hostname) );
 
 echo "Done";