diff --git a/tests/admin_utils/tests.py b/tests/admin_utils/tests.py
index 0adee38afa..582ed23b4d 100644
--- a/tests/admin_utils/tests.py
+++ b/tests/admin_utils/tests.py
@@ -149,43 +149,33 @@ class UtilsTests(SimpleTestCase):
 
             self.assertEqual(value, resolved_value)
 
-    def test_null_display_for_field(self):
-        """
-        Regression test for #12550: display_for_field should handle None
-        value.
-        """
-        display_value = display_for_field(None, models.CharField(), self.empty_value)
-        self.assertEqual(display_value, self.empty_value)
+    def test_empty_value_display_for_field(self):
+        tests = [
+            models.CharField(),
+            models.DateField(),
+            models.DecimalField(),
+            models.FloatField(),
+            models.JSONField(),
+            models.TimeField(),
+        ]
+        for model_field in tests:
+            with self.subTest(model_field=model_field):
+                display_value = display_for_field(None, model_field, self.empty_value)
+                self.assertEqual(display_value, self.empty_value)
 
-        display_value = display_for_field(
-            None, models.CharField(choices=((None, "test_none"),)), self.empty_value
-        )
+    def test_empty_value_display_choices(self):
+        model_field = models.CharField(choices=((None, "test_none"),))
+        display_value = display_for_field(None, model_field, self.empty_value)
         self.assertEqual(display_value, "test_none")
 
-        display_value = display_for_field(None, models.DateField(), self.empty_value)
-        self.assertEqual(display_value, self.empty_value)
-
-        display_value = display_for_field(None, models.TimeField(), self.empty_value)
-        self.assertEqual(display_value, self.empty_value)
-
-        display_value = display_for_field(
-            None, models.BooleanField(null=True), self.empty_value
-        )
+    def test_empty_value_display_booleanfield(self):
+        model_field = models.BooleanField(null=True)
+        display_value = display_for_field(None, model_field, self.empty_value)
         expected = (
-            '<img src="%sadmin/img/icon-unknown.svg" alt="None" />'
-            % settings.STATIC_URL
+            f'<img src="{settings.STATIC_URL}admin/img/icon-unknown.svg" alt="None" />'
         )
         self.assertHTMLEqual(display_value, expected)
 
-        display_value = display_for_field(None, models.DecimalField(), self.empty_value)
-        self.assertEqual(display_value, self.empty_value)
-
-        display_value = display_for_field(None, models.FloatField(), self.empty_value)
-        self.assertEqual(display_value, self.empty_value)
-
-        display_value = display_for_field(None, models.JSONField(), self.empty_value)
-        self.assertEqual(display_value, self.empty_value)
-
     def test_json_display_for_field(self):
         tests = [
             ({"a": {"b": "c"}}, '{"a": {"b": "c"}}'),