diff --git a/.github/workflows/python-app-ci.yml b/.github/workflows/python-app-ci.yml
index c4097aeb..34b39b8c 100644
--- a/.github/workflows/python-app-ci.yml
+++ b/.github/workflows/python-app-ci.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ macos-latest, ubuntu-latest ]
+        os: [ macos-13, ubuntu-latest ]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/src/keria/testing/testing_helper.py b/src/keria/testing/testing_helper.py
index af702482..eb7a836b 100644
--- a/src/keria/testing/testing_helper.py
+++ b/src/keria/testing/testing_helper.py
@@ -18,6 +18,7 @@
 from keri.core.coring import MtrDex
 from keri.core.eventing import SealEvent
 from keri.help import helping
+from keri.kering import TraitCodex
 from keri.vc import proving
 from keri.vdr import credentialing, verifying
 from keri.vdr import eventing as veventing
@@ -477,7 +478,7 @@ def createRegistry(client, agent, salt, doist, deeds):
                                   baks=[],
                                   toad="0",
                                   nonce=nonce,
-                                  cnfg=[eventing.TraitCodex.NoBackers],
+                                  cnfg=[TraitCodex.NoBackers],
                                   code=coring.MtrDex.Blake3_256)
         anchor = dict(i=regser.ked['i'], s=regser.ked["s"], d=regser.said)
         serder, sigers = Helpers.interact(pre=pre, bran=salt, pidx=0, ridx=0, dig=aid['d'], sn='1', data=[anchor])
diff --git a/tests/app/test_credentialing.py b/tests/app/test_credentialing.py
index e40ee7e7..d2d26328 100644
--- a/tests/app/test_credentialing.py
+++ b/tests/app/test_credentialing.py
@@ -12,7 +12,8 @@
 from hio.base import doing
 from keri.app import habbing
 from keri.core import scheming, coring, parsing, serdering
-from keri.core.eventing import TraitCodex, SealEvent
+from keri.core.eventing import SealEvent
+from keri.kering import TraitCodex
 from keri.vc import proving
 from keri.vdr import eventing
 from keri.vdr.credentialing import Regery, Registrar
diff --git a/tests/app/test_ipexing.py b/tests/app/test_ipexing.py
index 47cc492b..27b8f06c 100644
--- a/tests/app/test_ipexing.py
+++ b/tests/app/test_ipexing.py
@@ -15,7 +15,7 @@
 from keri.app import habbing, signing
 from keri.core import eventing, coring, serdering
 from keri.help import helping
-from keri.kering import Roles
+from keri.kering import Roles, TraitCodex
 from keri.peer import exchanging
 from keri.vc import proving
 from keri.vdr import eventing as veventing
@@ -606,7 +606,7 @@ def test_multisig_grant_admit(seeder, helpers):
                                   baks=[],
                                   toad="0",
                                   nonce=nonce,
-                                  cnfg=[eventing.TraitCodex.NoBackers],
+                                  cnfg=[TraitCodex.NoBackers],
                                   code=coring.MtrDex.Blake3_256)
 
         anchor = dict(i=regser.ked['i'], s=regser.ked["s"], d=regser.said)