diff --git a/zerver/tests/test_message_delete.py b/zerver/tests/test_message_delete.py
index aaac44e9a6..6cb08389bd 100644
--- a/zerver/tests/test_message_delete.py
+++ b/zerver/tests/test_message_delete.py
@@ -564,6 +564,8 @@ class DeleteMessageTest(ZulipTestCase):
 
         # Admins and moderators can delete any message. No one else can delete any
         # message.
+
+        # Test deleting channel messages
         check_delete_message_by_sender(
             "cordelia", "You don't have permission to delete this message"
         )
@@ -572,6 +574,18 @@ class DeleteMessageTest(ZulipTestCase):
         check_delete_message_by_other_user(
             "hamlet", "cordelia", "You don't have permission to delete this message"
         )
+        # Test deleting DMs
+        check_delete_message_by_sender(
+            "cordelia", "You don't have permission to delete this message", is_stream_message=False
+        )
+        check_delete_message_by_sender("shiva", is_stream_message=False)
+        check_delete_message_by_other_user("iago", "shiva", is_stream_message=False)
+        check_delete_message_by_other_user(
+            "hamlet",
+            "cordelia",
+            "You don't have permission to delete this message",
+            is_stream_message=False,
+        )
 
         # Check that guest cannot delete any message even when they are member
         # of the group which is allowed to delete any message.
@@ -586,10 +600,18 @@ class DeleteMessageTest(ZulipTestCase):
             user_group,
             acting_user=None,
         )
+        # Test deleting channel messages
         check_delete_message_by_other_user("cordelia", "hamlet")
         check_delete_message_by_other_user(
             "cordelia", "polonius", "You don't have permission to delete this message"
         )
+        # Test deleting DMs
+        check_delete_message_by_other_user(
+            "cordelia",
+            "polonius",
+            "You don't have permission to delete this message",
+            is_stream_message=False,
+        )
 
         do_change_realm_permission_group_setting(
             realm,
@@ -607,6 +629,12 @@ class DeleteMessageTest(ZulipTestCase):
         check_delete_message_by_other_user(
             "cordelia", "shiva", "You don't have permission to delete this message"
         )
+        check_delete_message_by_other_user(
+            "cordelia",
+            "shiva",
+            "You don't have permission to delete this message",
+            is_stream_message=False,
+        )
 
         do_change_stream_group_based_setting(
             stream,
@@ -712,8 +740,14 @@ class DeleteMessageTest(ZulipTestCase):
             nobody_system_group,
             acting_user=None,
         )
+        # Test deleting channel messages
         check_delete_message_by_sender("shiva", "You don't have permission to delete this message")
         check_delete_message_by_sender("iago")
+        # Test deleting DMs
+        check_delete_message_by_sender(
+            "shiva", "You don't have permission to delete this message", is_stream_message=False
+        )
+        check_delete_message_by_sender("iago", is_stream_message=False)
 
         do_change_realm_permission_group_setting(
             realm,
@@ -721,10 +755,16 @@ class DeleteMessageTest(ZulipTestCase):
             moderators_system_group,
             acting_user=None,
         )
+        # Test deleting channel messages
         check_delete_message_by_sender(
             "cordelia", "You don't have permission to delete this message"
         )
         check_delete_message_by_sender("shiva")
+        # Test deleting DMs
+        check_delete_message_by_sender(
+            "cordelia", "You don't have permission to delete this message", is_stream_message=False
+        )
+        check_delete_message_by_sender("shiva", is_stream_message=False)
 
         do_change_realm_permission_group_setting(
             realm,
@@ -740,8 +780,12 @@ class DeleteMessageTest(ZulipTestCase):
         do_change_realm_permission_group_setting(
             realm, "can_delete_own_message_group", everyone_system_group, acting_user=None
         )
+        # Test deleting channel messages
         check_delete_message_by_sender("cordelia")
         check_delete_message_by_sender("polonius")
+        # Test deleting DMs
+        check_delete_message_by_sender("cordelia", is_stream_message=False)
+        check_delete_message_by_sender("polonius", is_stream_message=False)
 
         do_change_realm_permission_group_setting(
             realm, "can_delete_own_message_group", nobody_system_group, acting_user=None