diff --git a/Tests/dblayerooComplet.php b/Tests/dblayerooComplet.php
index f1d015b..b80d81a 100644
--- a/Tests/dblayerooComplet.php
+++ b/Tests/dblayerooComplet.php
@@ -974,7 +974,7 @@ class test_dblayeroo_{ENGINE} extends PHPUnit_Framework_TestCase
     ), $res);
   }
 
-  public function test_displayAdd_MAX1 ()
+  public function test_displayAdd_MAX_GROUPBY1 ()
   {
     $tbl2 = $this->tbl2 ();
     $res = $tbl2->select ()
@@ -991,7 +991,7 @@ class test_dblayeroo_{ENGINE} extends PHPUnit_Framework_TestCase
       $res);
   }
 
-  public function test_displayAdd_MAX2 ()
+  public function test_displayAdd_MAX_GROUPBY2 ()
   {
     $tbl2 = $this->tbl2 ();
     $res = $tbl2->select ()
@@ -1000,4 +1000,22 @@ class test_dblayeroo_{ENGINE} extends PHPUnit_Framework_TestCase
     $tbl2->disconnect ();
     $this->assertSame (array (array ('MAX(uid)' => 6)), $res);
   }
+
+  public function test_displayAdd_MAX_GROUPBY3 ()
+  {
+    $tbl1 = $this->tbl1 ();
+    $tbl2 = $this->tbl2 ();
+    $tbl1->select ()
+         ->displayAdd ("group");
+    $res = $tbl2->select ()
+                ->displayAdd ("MAX(uid)")
+                ->joinInner ($tbl1, array ("group"=>"group"))
+->debug (1)
+                ->execute ();
+    $tbl2->disconnect ();
+    $this->assertSame (array (array (
+      'groupedoo.group' => 'group1',
+      'MAX(usersoo.uid)' => 6,
+    )), $res);
+  }
 }