diff --git a/ovos_workshop/skills/ovos.py b/ovos_workshop/skills/ovos.py
index 4117c62..7dca9a0 100644
--- a/ovos_workshop/skills/ovos.py
+++ b/ovos_workshop/skills/ovos.py
@@ -152,10 +152,8 @@ def __acknowledge_classic():
         require a verbal response. This is intended to provide simple feedback
         to the user that their request was handled successfully.
         """
-        # DEPRECATED - note that this is a staticmethod and uses the old endpoint
-        # the OVOSSkill class does things properly
-        from ovos_utils.sound import play_acknowledge_sound
-        return play_acknowledge_sound()
+        # use BaseSkill method, self.play_audio does not exist
+        return super().acknowledge()
 
     @backwards_compat(classic_core=__acknowledge_classic)
     def acknowledge(self):
diff --git a/test/unittests/test_skill.py b/test/unittests/test_skill.py
index c1f2523..df47998 100644
--- a/test/unittests/test_skill.py
+++ b/test/unittests/test_skill.py
@@ -1,15 +1,26 @@
 import json
 import unittest
+from os.path import dirname
 from unittest.mock import Mock
 
-from ovos_bus_client import Message
-
-from ovos_workshop.skills.ovos import OVOSSkill
-from ovos_workshop.skills.mycroft_skill import MycroftSkill, is_classic_core
 from mycroft.skills import MycroftSkill as CoreSkill
+from ovos_bus_client import Message
 from ovos_utils.messagebus import FakeBus
-from os.path import dirname
 from ovos_workshop.skill_launcher import SkillLoader
+from ovos_workshop.skills.mycroft_skill import MycroftSkill
+from ovos_workshop.skills.ovos import OVOSSkill
+
+
+def is_classic_core():
+    try:
+        from mycroft.version import OVOS_VERSION_STR
+        return False
+    except:
+        try:
+            import mycroft
+            return True
+        except:
+            return False
 
 
 class LegacySkill(CoreSkill):
@@ -102,7 +113,7 @@ def test_skill_id(self):
 
             # if running in ovos-core every message will have the skill_id in context
             for msg in self.bus.emitted_msgs:
-                if msg["type"] == 'mycroft.skills.loaded': # emitted by SkillLoader, not by skill
+                if msg["type"] == 'mycroft.skills.loaded':  # emitted by SkillLoader, not by skill
                     continue
                 self.assertEqual(msg["context"]["skill_id"], "abort.test")