diff --git a/django/contrib/admin/options.py b/django/contrib/admin/options.py
index 8b0af2b78d..a09c958282 100644
--- a/django/contrib/admin/options.py
+++ b/django/contrib/admin/options.py
@@ -1135,9 +1135,9 @@ class ModelAdmin(BaseModelAdmin):
             new_value = obj.serializable_value(attr)
             popup_response_data = json.dumps({
                 'action': 'change',
-                'value': value,
+                'value': six.text_type(value),
                 'obj': six.text_type(obj),
-                'new_value': new_value,
+                'new_value': six.text_type(new_value),
             })
             return SimpleTemplateResponse('admin/popup_response.html', {
                 'popup_response_data': popup_response_data,
diff --git a/docs/releases/1.9.2.txt b/docs/releases/1.9.2.txt
index 375fe3edaa..ffe5030d9e 100644
--- a/docs/releases/1.9.2.txt
+++ b/docs/releases/1.9.2.txt
@@ -21,3 +21,7 @@ Bugfixes
 * Fixed a regression that caused the incorrect day to be selected when opening
   the admin calendar widget for timezones from GMT+0100 to GMT+1200
   (:ticket:`24980`).
+
+* Fixed a regression in the admin's edit related model popup that caused an
+  escaped value to be displayed in the select dropdown of the parent window
+  (:ticket:`25997`).
diff --git a/tests/admin_views/admin.py b/tests/admin_views/admin.py
index 25502dc6af..dbc77e2f7c 100644
--- a/tests/admin_views/admin.py
+++ b/tests/admin_views/admin.py
@@ -34,16 +34,16 @@ from .models import (
     GenRelReference, Grommet, ImplicitlyGeneratedPK, Ingredient,
     InlineReference, InlineReferer, Inquisition, Language, Link,
     MainPrepopulated, ModelWithStringPrimaryKey, NotReferenced, OldSubscriber,
-    OtherStory, Paper, Parent, ParentWithDependentChildren, Person, Persona,
-    Picture, Pizza, Plot, PlotDetails, PluggableSearchPerson, Podcast, Post,
-    PrePopulatedPost, PrePopulatedPostLargeSlug, PrePopulatedSubPost, Promo,
-    Question, Recipe, Recommendation, Recommender, ReferencedByGenRel,
-    ReferencedByInline, ReferencedByParent, RelatedPrepopulated, Report,
-    Reservation, Restaurant, RowLevelChangePermissionModel, Section,
-    ShortMessage, Simple, Sketch, State, Story, StumpJoke, Subscriber,
-    SuperVillain, Telegram, Thing, Topping, UnchangeableObject,
-    UndeletableObject, UnorderedObject, UserMessenger, Villain, Vodcast,
-    Whatsit, Widget, Worker, WorkHour,
+    OtherStory, Paper, Parent, ParentWithDependentChildren, ParentWithUUIDPK,
+    Person, Persona, Picture, Pizza, Plot, PlotDetails, PluggableSearchPerson,
+    Podcast, Post, PrePopulatedPost, PrePopulatedPostLargeSlug,
+    PrePopulatedSubPost, Promo, Question, Recipe, Recommendation, Recommender,
+    ReferencedByGenRel, ReferencedByInline, ReferencedByParent,
+    RelatedPrepopulated, RelatedWithUUIDPKModel, Report, Reservation,
+    Restaurant, RowLevelChangePermissionModel, Section, ShortMessage, Simple,
+    Sketch, State, Story, StumpJoke, Subscriber, SuperVillain, Telegram, Thing,
+    Topping, UnchangeableObject, UndeletableObject, UnorderedObject,
+    UserMessenger, Villain, Vodcast, Whatsit, Widget, Worker, WorkHour,
 )
 
 
@@ -949,6 +949,8 @@ site.register(ReferencedByInline)
 site.register(InlineReferer, InlineRefererAdmin)
 site.register(ReferencedByGenRel)
 site.register(GenRelReference)
+site.register(ParentWithUUIDPK)
+site.register(RelatedWithUUIDPKModel)
 
 # We intentionally register Promo and ChapterXtra1 but not Chapter nor ChapterXtra2.
 # That way we cover all four cases:
diff --git a/tests/admin_views/models.py b/tests/admin_views/models.py
index aa4476c9ed..5411885ee9 100644
--- a/tests/admin_views/models.py
+++ b/tests/admin_views/models.py
@@ -4,6 +4,7 @@ from __future__ import unicode_literals
 import datetime
 import os
 import tempfile
+import uuid
 
 from django.contrib.auth.models import User
 from django.contrib.contenttypes.fields import (
@@ -956,3 +957,15 @@ class ReferencedByGenRel(models.Model):
 
 class GenRelReference(models.Model):
     references = GenericRelation(ReferencedByGenRel)
+
+
+class ParentWithUUIDPK(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    title = models.CharField(max_length=100)
+
+    def __str__(self):
+        return str(self.id)
+
+
+class RelatedWithUUIDPKModel(models.Model):
+    parent = models.ForeignKey(ParentWithUUIDPK, on_delete=models.CASCADE)
diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index 49afb860c5..7f94358fec 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -52,14 +52,14 @@ from .models import (
     Fabric, FancyDoodad, FieldOverridePost, FilteredManager, FooAccount,
     FoodDelivery, FunkyTag, Gallery, Grommet, Inquisition, Language, Link,
     MainPrepopulated, ModelWithStringPrimaryKey, OtherStory, Paper, Parent,
-    ParentWithDependentChildren, Person, Persona, Picture, Pizza, Plot,
-    PlotDetails, PluggableSearchPerson, Podcast, Post, PrePopulatedPost, Promo,
-    Question, Recommendation, Recommender, RelatedPrepopulated, Report,
-    Restaurant, RowLevelChangePermissionModel, SecretHideout, Section,
-    ShortMessage, Simple, State, Story, Subscriber, SuperSecretHideout,
-    SuperVillain, Telegram, TitleTranslation, Topping, UnchangeableObject,
-    UndeletableObject, UnorderedObject, Villain, Vodcast, Whatsit, Widget,
-    Worker, WorkHour,
+    ParentWithDependentChildren, ParentWithUUIDPK, Person, Persona, Picture,
+    Pizza, Plot, PlotDetails, PluggableSearchPerson, Podcast, Post,
+    PrePopulatedPost, Promo, Question, Recommendation, Recommender,
+    RelatedPrepopulated, RelatedWithUUIDPKModel, Report, Restaurant,
+    RowLevelChangePermissionModel, SecretHideout, Section, ShortMessage,
+    Simple, State, Story, Subscriber, SuperSecretHideout, SuperVillain,
+    Telegram, TitleTranslation, Topping, UnchangeableObject, UndeletableObject,
+    UnorderedObject, Villain, Vodcast, Whatsit, Widget, Worker, WorkHour,
 )
 
 
@@ -4515,6 +4515,22 @@ class SeleniumAdminViewsFirefoxTests(AdminSeleniumWebDriverTestCase):
         select = Select(self.selenium.find_element_by_id('id_form-0-section'))
         self.assertEqual(select.first_selected_option.text, 'new section')
 
+    def test_inline_uuid_pk_edit_with_popup(self):
+        from selenium.webdriver.support.ui import Select
+        parent = ParentWithUUIDPK.objects.create(title='test')
+        related_with_parent = RelatedWithUUIDPKModel.objects.create(parent=parent)
+        self.admin_login(username='super', password='secret', login_url=reverse('admin:index'))
+        change_url = reverse('admin:admin_views_relatedwithuuidpkmodel_change', args=(related_with_parent.id,))
+        self.selenium.get(self.live_server_url + change_url)
+        self.selenium.find_element_by_id('change_id_parent').click()
+        self.wait_for_popup()
+        self.selenium.switch_to.window(self.selenium.window_handles[-1])
+        self.selenium.find_element_by_xpath('//input[@value="Save"]').click()
+        self.selenium.switch_to.window(self.selenium.window_handles[0])
+        select = Select(self.selenium.find_element_by_id('id_parent'))
+        self.assertEqual(select.first_selected_option.text, str(parent.id))
+        self.assertEqual(select.first_selected_option.get_attribute('value'), str(parent.id))
+
 
 class SeleniumAdminViewsChromeTests(SeleniumAdminViewsFirefoxTests):
     webdriver_class = 'selenium.webdriver.chrome.webdriver.WebDriver'