diff --git a/apps/vscode-e2e/src/suite/tools/execute-command-native.test.ts b/apps/vscode-e2e/src/suite/tools/execute-command-native.test.ts
index b4b5ec2e35..c3888308ba 100644
--- a/apps/vscode-e2e/src/suite/tools/execute-command-native.test.ts
+++ b/apps/vscode-e2e/src/suite/tools/execute-command-native.test.ts
@@ -44,6 +44,12 @@ function createVerificationState(): NativeProtocolVerification {
 function assertNativeProtocolUsed(verification: NativeProtocolVerification, testName: string): void {
 	assert.ok(verification.apiProtocol !== null, `[${testName}] apiProtocol should be set in api_req_started message.`)
 
+	assert.strictEqual(
+		verification.hasNativeApiProtocol,
+		true,
+		`[${testName}] Native API protocol should be used. Expected apiProtocol to be "anthropic" or "openai", but got: ${verification.apiProtocol}`,
+	)
+
 	assert.strictEqual(verification.responseIsNotXML, true, `[${testName}] Response should NOT contain XML tool tags.`)
 
 	assert.strictEqual(
diff --git a/apps/vscode-e2e/src/suite/tools/list-files-native.test.ts b/apps/vscode-e2e/src/suite/tools/list-files-native.test.ts
index 4977230776..255a85c226 100644
--- a/apps/vscode-e2e/src/suite/tools/list-files-native.test.ts
+++ b/apps/vscode-e2e/src/suite/tools/list-files-native.test.ts
@@ -44,6 +44,12 @@ function createVerificationState(): NativeProtocolVerification {
 function assertNativeProtocolUsed(verification: NativeProtocolVerification, testName: string): void {
 	assert.ok(verification.apiProtocol !== null, `[${testName}] apiProtocol should be set in api_req_started message.`)
 
+	assert.strictEqual(
+		verification.hasNativeApiProtocol,
+		true,
+		`[${testName}] Native API protocol should be used. Expected apiProtocol to be "anthropic" or "openai", but got: ${verification.apiProtocol}`,
+	)
+
 	assert.strictEqual(verification.responseIsNotXML, true, `[${testName}] Response should NOT contain XML tool tags.`)
 
 	assert.strictEqual(
diff --git a/apps/vscode-e2e/src/suite/tools/read-file-native.test.ts b/apps/vscode-e2e/src/suite/tools/read-file-native.test.ts
index 9a9671d727..32cd2cf49c 100644
--- a/apps/vscode-e2e/src/suite/tools/read-file-native.test.ts
+++ b/apps/vscode-e2e/src/suite/tools/read-file-native.test.ts
@@ -45,6 +45,12 @@ function createVerificationState(): NativeProtocolVerification {
 function assertNativeProtocolUsed(verification: NativeProtocolVerification, testName: string): void {
 	assert.ok(verification.apiProtocol !== null, `[${testName}] apiProtocol should be set in api_req_started message.`)
 
+	assert.strictEqual(
+		verification.hasNativeApiProtocol,
+		true,
+		`[${testName}] Native API protocol should be used. Expected apiProtocol to be "anthropic" or "openai", but got: ${verification.apiProtocol}`,
+	)
+
 	assert.strictEqual(verification.responseIsNotXML, true, `[${testName}] Response should NOT contain XML tool tags.`)
 
 	assert.strictEqual(