diff --git a/src/registrar/admin.py b/src/registrar/admin.py
index e77df1ce5..7439217a1 100644
--- a/src/registrar/admin.py
+++ b/src/registrar/admin.py
@@ -1180,7 +1180,7 @@ class DomainAdmin(ListHeaderAdmin):
             obj.renew_domain(length=years)
             self.message_user(
                 request,
-                f"Successfully extended expiration date.",
+                f"Successfully extended the expiration date.",
             )
         except RegistryError as err:
             if err.is_connection_error():
diff --git a/src/registrar/tests/test_admin.py b/src/registrar/tests/test_admin.py
index 4da7de85a..6cc6f96ea 100644
--- a/src/registrar/tests/test_admin.py
+++ b/src/registrar/tests/test_admin.py
@@ -101,7 +101,7 @@ class TestDomainAdmin(MockEppLib, WebTest):
         self.assertContains(response, "Extend expiration date")
 
         # Ensure the message we recieve is in line with what we expect
-        expected_message = f"Successfully extended expiration date."
+        expected_message = f"Successfully extended the expiration date."
         expected_call = call(
             # The WGSI request doesn't need to be tested
             ANY,