Fix for failing unit tests

pkg/tbtc/node.go

@@ -241,7 +241,11 @@ func (n *node) getSigningExecutor(
 		return nil, false, fmt.Errorf("failed to get broadcast channel: [%v]", err)
 	}
 
-	registerSigningUnmarshallers(broadcastChannel)
+	signing.RegisterUnmarshallers(broadcastChannel)
+	announcer.RegisterUnmarshaller(broadcastChannel)
+	broadcastChannel.SetUnmarshaler(func() net.TaggedUnmarshaler {
+		return &signingDoneMessage{}
+	})
 
 	membershipValidator := group.NewMembershipValidator(
 		executorLogger,
@@ -600,14 +604,3 @@ func withCancelOnBlock(
 
 	return blockCtx, cancelBlockCtx
 }
-
-// registerSigningUnmarshallers initializes the given broadcast channel to be
-// able to perform the signing protocol interactions by registering all the
-// required protocol unmarshallers.
-func registerSigningUnmarshallers(channel net.BroadcastChannel) {
-	signing.RegisterUnmarshallers(channel)
-	announcer.RegisterUnmarshaller(channel)
-	channel.SetUnmarshaler(func() net.TaggedUnmarshaler {
-		return &signingDoneMessage{}
-	})
-}