diff --git a/src/globals/ext-tests/zlib.php b/src/globals/ext-tests/zlib.php
index 699fc759..ed81775c 100644
--- a/src/globals/ext-tests/zlib.php
+++ b/src/globals/ext-tests/zlib.php
@@ -2,11 +2,11 @@
 
 declare(strict_types=1);
 
-assert(function_exists('gzcompress'));
+assert(function_exists('gzencode'));
 assert(function_exists('gzdecode'));
 
 $input = str_repeat('The quick brown fox jumps over the lazy dog. ', 10);
-$compressed = gzcompress($input);
+$compressed = gzencode($input);
 assert(is_string($compressed));
 assert(strlen($compressed) < strlen($input));