diff --git a/combo/data/models.py b/combo/data/models.py
index da81df4e..8a2ad5af 100644
--- a/combo/data/models.py
+++ b/combo/data/models.py
@@ -174,17 +174,13 @@ class Page(models.Model):
             max_order = Page.objects.all().aggregate(Max('order')).get('order__max') or 0
             self.order = max_order + 1
         if not self.slug:
-            if Page.objects.count() == 0:
+            if not Page.objects.exists():
                 slug = 'index'
             else:
                 base_slug = slugify(self.title)[:40]
                 slug = base_slug.strip('-')
             i = 1
-            while True:
-                try:
-                    Page.objects.get(slug=slug, parent_id=self.parent_id)
-                except ObjectDoesNotExist:
-                    break
+            while Page.objects.filter(slug=slug, parent_id=self.parent_id).exists():
                 i += 1
                 slug = '%s-%s' % (base_slug, i)
             self.slug = slug
@@ -442,6 +438,8 @@ class Page(models.Model):
         new_page.pk = None
         # set title
         new_page.title = _('Copy of %s') % self.title
+        # reset slug
+        new_page.slug = None
         # reset snapshot
         new_page.snapshot = None
         # set order
diff --git a/tests/test_pages.py b/tests/test_pages.py
index f44ee179..5f45670e 100644
--- a/tests/test_pages.py
+++ b/tests/test_pages.py
@@ -197,6 +197,7 @@ def test_duplicate_page():
     group1 = Group.objects.create(name='foobar')
     group2 = Group.objects.create(name='fooblah')
 
+    Page.objects.create()  # page without snapshot, with slug 'index'
     page = Page.objects.create(
         title='foo',
         slug='foo',
@@ -213,7 +214,7 @@ def test_duplicate_page():
     new_page = page.duplicate()
     assert new_page.pk != page.pk
     assert new_page.title == 'Copy of foo'
-    assert new_page.slug == page.slug
+    assert new_page.slug == 'copy-of-foo'
     assert new_page.description == page.description
     assert new_page.parent is None
     assert new_page.snapshot is None
@@ -231,6 +232,10 @@ def test_duplicate_page():
     assert new_cell2.placeholder == cell2.placeholder
     assert list(new_cell2.groups.all()) == []
 
+    # duplicate again !
+    new_page = page.duplicate()
+    assert new_page.slug == 'copy-of-foo-2'
+
     parent = Page.objects.create()
     page.parent = parent
     page.save()