diff --git a/eav/models/__init__.py b/eav/models/__init__.py
index 6f0efb4..952d586 100644
--- a/eav/models/__init__.py
+++ b/eav/models/__init__.py
@@ -17,9 +17,9 @@ from .value import Value
 
 __all__ = [
     "Attribute",
+    "EAVModelMeta",
+    "Entity",
     "EnumGroup",
     "EnumValue",
     "Value",
-    "Entity",
-    "EAVModelMeta",
 ]
diff --git a/eav/models/value.py b/eav/models/value.py
index d392ee1..2b5cf65 100644
--- a/eav/models/value.py
+++ b/eav/models/value.py
@@ -178,16 +178,16 @@ class Value(models.Model):
         entity = self.entity_pk_uuid if self.entity_uuid else self.entity_pk_int
         return f'{self.attribute.name}: "{self.value}" ({entity})'
 
-    def save(self, *args, **kwargs):
-        """Validate and save this value."""
-        self.full_clean()
-        super().save(*args, **kwargs)
-
     def __repr__(self) -> str:
         """Representation of Value object."""
         entity = self.entity_pk_uuid if self.entity_uuid else self.entity_pk_int
         return f'{self.attribute.name}: "{self.value}" ({entity})'
 
+    def save(self, *args, **kwargs):
+        """Validate and save this value."""
+        self.full_clean()
+        super().save(*args, **kwargs)
+
     def natural_key(self) -> tuple[tuple[str, str], int, str]:
         """
         Retrieve the natural key for the Value instance.
diff --git a/test_project/models.py b/test_project/models.py
index 338a3ec..7bd7720 100644
--- a/test_project/models.py
+++ b/test_project/models.py
@@ -101,7 +101,7 @@ class Encounter(TestBase):
     patient = models.ForeignKey(Patient, on_delete=models.PROTECT)
 
     def __str__(self):
-        return "%s: encounter num %d" % (self.patient, self.num)
+        return f"{self.patient}: encounter num {self.num}"
 
     def __repr__(self):
         return self.name