diff --git a/packages/cc/src/cc/Security2CC.ts b/packages/cc/src/cc/Security2CC.ts
index 1a7f1426d655..f66f6806e84c 100644
--- a/packages/cc/src/cc/Security2CC.ts
+++ b/packages/cc/src/cc/Security2CC.ts
@@ -1813,7 +1813,7 @@ export class Security2CCMessageEncapsulation extends Security2CC {
 				&& prevSequenceNumber != undefined
 				&& this["_sequenceNumber"] === ((prevSequenceNumber + 1) & 0xff)
 				// And in case of a mock-based test, do this only on the controller
-				&& !this.host.__internalIsMockNode
+				&& !ctx.__internalIsMockNode
 			) {
 				const nonce = spanState.currentSPAN.nonce;
 				spanState.currentSPAN = undefined;
diff --git a/packages/host/src/ZWaveHost.ts b/packages/host/src/ZWaveHost.ts
index c2bbf99d9f41..a525c9b7c596 100644
--- a/packages/host/src/ZWaveHost.ts
+++ b/packages/host/src/ZWaveHost.ts
@@ -44,6 +44,7 @@ export interface CCParsingContext
 	extends Readonly<SecurityManagers>, GetDeviceConfig, HostIDs
 {
 	sourceNodeId: number;
+	__internalIsMockNode?: boolean;
 
 	/** If known, the frame type of the containing message */
 	frameType?: FrameType;
@@ -112,8 +113,6 @@ export interface ZWaveHost {
 		nodeId: number,
 		endpointIndex?: number,
 	): boolean;
-
-	__internalIsMockNode?: boolean;
 }
 
 /** Host application abstractions that provide support for reading and writing values to a database */
diff --git a/packages/host/src/mocks.ts b/packages/host/src/mocks.ts
index 765c493a8a65..368c8a877c51 100644
--- a/packages/host/src/mocks.ts
+++ b/packages/host/src/mocks.ts
@@ -30,10 +30,7 @@ export type BaseTestNode =
 export type TestingHost<
 	TNode extends BaseTestNode,
 > =
-	& Omit<
-		ZWaveApplicationHost<TNode>,
-		"__internalIsMockNode"
-	>
+	& ZWaveApplicationHost<TNode>
 	& {
 		setNode(nodeId: number, node: TNode): void;
 	};
diff --git a/packages/testing/src/MockNode.ts b/packages/testing/src/MockNode.ts
index d7bc77c83284..57d2d4cf0263 100644
--- a/packages/testing/src/MockNode.ts
+++ b/packages/testing/src/MockNode.ts
@@ -115,7 +115,6 @@ export class MockNode {
 		// A node's host is a bit more specialized than the controller's host.
 		this.host = {
 			...this.controller.host,
-			__internalIsMockNode: true,
 			// // Mimic the behavior of ZWaveNode, but for arbitrary node IDs
 		};
 
diff --git a/packages/zwave-js/src/lib/controller/MockControllerBehaviors.ts b/packages/zwave-js/src/lib/controller/MockControllerBehaviors.ts
index ecd8219717be..5fea5577cd17 100644
--- a/packages/zwave-js/src/lib/controller/MockControllerBehaviors.ts
+++ b/packages/zwave-js/src/lib/controller/MockControllerBehaviors.ts
@@ -99,6 +99,7 @@ function createLazySendDataPayload(
 				origin: MessageOrigin.Host,
 				context: {
 					sourceNodeId: node.id,
+					__internalIsMockNode: true,
 					...node.encodingContext,
 					...node.securityManagers,
 				},