diff --git a/tests/Persistence/SqlTest.php b/tests/Persistence/SqlTest.php
index 3c24d72cd2..9948bcf3c7 100644
--- a/tests/Persistence/SqlTest.php
+++ b/tests/Persistence/SqlTest.php
@@ -282,7 +282,9 @@ public function testSameRowFieldStability(): void
         $randRow0 = $export[0]['rand'];
         $randRow1 = $export[1]['rand'];
         $this->assertNotSame($randRow0, $randRow1); // $this->assertGreaterThan($randRow0, $randRow1);
-        // $this->assertNotSame($randRow0, $export[0]['rand_independent']); // TODO this can be the same, depending on how we implement it
+        // TODO this can be the same, depending on how we implement it
+        // already stable under some circumstances on PostgreSQL http://sqlfiddle.com/#!17/4b040/4
+        // $this->assertNotSame($randRow0, $export[0]['rand_independent']);
 
         $this->assertSame($randRow0, $export[0]['rand2']);
         $this->assertSame($randRow1, $export[1]['rand2']);