1 files changed, 13 insertions, 0 deletions
diff --git a/tests/djapp/models.py b/tests/djapp/models.py
index e98279d..9b21181 100644
--- a/tests/djapp/models.py
+++ b/tests/djapp/models.py
@@ -55,6 +55,15 @@ class ConcreteSon(AbstractBase):
     pass
 
 
+class AbstractSon(AbstractBase):
+    class Meta:
+        abstract = True
+
+
+class ConcreteGrandSon(AbstractSon):
+    pass
+
+
 class StandardSon(StandardModel):
     pass
 
@@ -74,3 +83,7 @@ if Image is not None:  # PIL is available
 else:
     class WithImage(models.Model):
         pass
+
+
+class WithSignals(models.Model):
+    foo = models.CharField(max_length=20)