diff --git a/ext/dba/tests/bug78808.phpt b/ext/dba/tests/bug78808.phpt
index 9aa4e22a3220..382bf891bcee 100644
--- a/ext/dba/tests/bug78808.phpt
+++ b/ext/dba/tests/bug78808.phpt
@@ -2,7 +2,6 @@
 Bug #78808 ([LMDB] MDB_MAP_FULL: Environment mapsize limit reached)
 --SKIPIF--
 <?php
-if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
 $handler = 'lmdb';
 require_once __DIR__ .'/skipif.inc';
 ?>
@@ -10,9 +9,10 @@ require_once __DIR__ .'/skipif.inc';
 <?php
 $handler = 'lmdb';
 require_once __DIR__ .'/test.inc';
+$value = str_repeat('*', 0x100000);
 $lmdb_h = dba_open($db_filename, 'c', 'lmdb', 0644, 5*1048576);
-for ($i = 0; $i < 50000; $i++) {
-    dba_insert('key' . $i, 'value '. $i, $lmdb_h);
+for ($i = 0; $i < 3; $i++) {
+    dba_insert('key' . $i, $value, $lmdb_h);
 }
 dba_close($lmdb_h);
 echo "done\n";