diff --git a/acapy_agent/core/tests/test_plugin_registry.py b/acapy_agent/core/tests/test_plugin_registry.py
index b5727a4546..6c47ffd434 100644
--- a/acapy_agent/core/tests/test_plugin_registry.py
+++ b/acapy_agent/core/tests/test_plugin_registry.py
@@ -11,6 +11,7 @@
 from ..goal_code_registry import GoalCodeRegistry
 from ..plugin_registry import PluginRegistry
 from ..protocol_registry import ProtocolRegistry
+from ...didcomm_v2.protocol_registry import V2ProtocolRegistry
 
 
 class TestPluginRegistry(IsolatedAsyncioTestCase):
@@ -27,6 +28,7 @@ def setUp(self):
             register_controllers=mock.MagicMock(),
         )
         self.context.injector.bind_instance(ProtocolRegistry, self.proto_registry)
+        self.context.injector.bind_instance(V2ProtocolRegistry, V2ProtocolRegistry())
         self.context.injector.bind_instance(GoalCodeRegistry, self.goal_code_registry)
 
     async def test_setup(self):
diff --git a/acapy_agent/protocols_v2/basicmessage/v1_0/message_types.py b/acapy_agent/protocols_v2/basicmessage/v1_0/message_types.py
index 6fc13c7682..8f3bf4a23d 100644
--- a/acapy_agent/protocols_v2/basicmessage/v1_0/message_types.py
+++ b/acapy_agent/protocols_v2/basicmessage/v1_0/message_types.py
@@ -14,6 +14,7 @@
 
 class basic_message:
     """Basic Message 2.0 DIDComm V2 Protocol."""
+
     async def __call__(self, *args, **kwargs):
         """Call the Handler."""
         await self.handle(*args, **kwargs)
diff --git a/acapy_agent/protocols_v2/discovery/v1_0/message_types.py b/acapy_agent/protocols_v2/discovery/v1_0/message_types.py
index 527e2d09db..49e8d398c1 100644
--- a/acapy_agent/protocols_v2/discovery/v1_0/message_types.py
+++ b/acapy_agent/protocols_v2/discovery/v1_0/message_types.py
@@ -19,6 +19,7 @@
 
 class discover_features:
     """Discover Features 2.0 DIDComm V2 Protocol."""
+
     async def __call__(self, *args, **kwargs):
         """Call the Handler."""
         await self.handle(*args, **kwargs)
diff --git a/acapy_agent/protocols_v2/empty/v1_0/message_types.py b/acapy_agent/protocols_v2/empty/v1_0/message_types.py
index aa8fd62e99..11d71fa995 100644
--- a/acapy_agent/protocols_v2/empty/v1_0/message_types.py
+++ b/acapy_agent/protocols_v2/empty/v1_0/message_types.py
@@ -13,6 +13,7 @@
 
 class basic_message:
     """Empty 1.0 DIDComm V2 Protocol."""
+
     async def __call__(self, *args, **kwargs):
         """Call the Handler."""
         await self.handle(*args, **kwargs)
diff --git a/acapy_agent/protocols_v2/trustping/v1_0/message_types.py b/acapy_agent/protocols_v2/trustping/v1_0/message_types.py
index 9251bd447b..0b55852353 100644
--- a/acapy_agent/protocols_v2/trustping/v1_0/message_types.py
+++ b/acapy_agent/protocols_v2/trustping/v1_0/message_types.py
@@ -15,6 +15,7 @@
 
 class trust_ping:
     """Trust Ping 2.0 DIDComm V2 Protocol."""
+
     async def __call__(self, *args, **kwargs):
         """Call the Handler."""
         await self.handle(*args, **kwargs)