diff --git a/lib/client_factory.ts b/lib/client_factory.ts
index 6601a5739..747992d91 100644
--- a/lib/client_factory.ts
+++ b/lib/client_factory.ts
@@ -1,5 +1,5 @@
 /**
- * Copyright 2025, Optimizely
+ * Copyright 2025-2026, Optimizely
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ import { extractOdpManager } from "./odp/odp_manager_factory";
 import { extractVuidManager } from "./vuid/vuid_manager_factory";
 import { RequestHandler } from "./utils/http_request_handler/http";
 import { CLIENT_VERSION, DEFAULT_CMAB_BACKOFF_MS, DEFAULT_CMAB_CACHE_SIZE, DEFAULT_CMAB_CACHE_TIMEOUT_MS, DEFAULT_CMAB_RETRIES, JAVASCRIPT_CLIENT_ENGINE } from "./utils/enums";
-import Optimizely from "./optimizely";
+import Optimizely, { OptimizelyOptions } from "./optimizely";
 import { DefaultCmabClient } from "./core/decision_service/cmab/cmab_client";
 import { CmabCacheValue, DefaultCmabService } from "./core/decision_service/cmab/cmab_service";
 import { InMemoryLruCache } from "./utils/cache/in_memory_lru_cache";
@@ -76,7 +76,7 @@ export const getOptimizelyInstance = (config: OptimizelyFactoryConfig): Optimize
     logger: logger?.child()
   });
 
-  const optimizelyOptions = {
+  const optimizelyOptions: OptimizelyOptions = {
     cmabService,
     clientEngine: clientEngine || JAVASCRIPT_CLIENT_ENGINE,
     clientVersion: clientVersion || CLIENT_VERSION,
@@ -91,6 +91,9 @@ export const getOptimizelyInstance = (config: OptimizelyFactoryConfig): Optimize
     eventProcessor,
     odpManager,
     vuidManager,
+    // UNSTABLE_conditionEvaluators is not exposed in the public types, but we want to pass it through
+    // for internal use cases.
+    UNSTABLE_conditionEvaluators: (config as any).UNSTABLE_conditionEvaluators,
   };
 
   return new Optimizely(optimizelyOptions);
diff --git a/lib/core/decision_service/index.tests.js b/lib/core/decision_service/index.tests.js
index 346814857..84c4f8c5f 100644
--- a/lib/core/decision_service/index.tests.js
+++ b/lib/core/decision_service/index.tests.js
@@ -77,6 +77,7 @@ var createLogger = () => ({
   warn: () => {},
   error: () => {},
   child: () => createLogger(),
+  setName: () => {},
 })
 
 describe('lib/core/decision_service', function() {
diff --git a/lib/core/decision_service/index.ts b/lib/core/decision_service/index.ts
index 452f74bce..217550f17 100644
--- a/lib/core/decision_service/index.ts
+++ b/lib/core/decision_service/index.ts
@@ -1,5 +1,5 @@
 /**
- * Copyright 2017-2022, 2024-2025, Optimizely
+ * Copyright 2017-2022, 2024-2026, Optimizely
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -158,6 +158,8 @@ export type DecideOptionsMap = Partial<Record<OptimizelyDecideOption, boolean>>;
 
 export const CMAB_DUMMY_ENTITY_ID= '$'
 
+export const LOGGER_NAME = 'DecisionService';
+
 /**
  * Optimizely's decision service that determines which variation of an experiment the user will be allocated to.
  *
@@ -183,6 +185,7 @@ export class DecisionService {
 
   constructor(options: DecisionServiceOptions) {
     this.logger = options.logger;
+    this.logger?.setName(LOGGER_NAME);
     this.audienceEvaluator = createAudienceEvaluator(options.UNSTABLE_conditionEvaluators, this.logger);
     this.forcedVariationMap = {};
     this.userProfileService = options.userProfileService;
diff --git a/lib/optimizely/index.tests.js b/lib/optimizely/index.tests.js
index 4cb9bb7da..437749cfb 100644
--- a/lib/optimizely/index.tests.js
+++ b/lib/optimizely/index.tests.js
@@ -98,6 +98,7 @@ var createLogger = () => ({
   warn: () => {},
   error: () => {},
   child: () => createLogger(),
+  setName: () => {},
 })
 
 const getOptlyInstance = ({ datafileObj, defaultDecideOptions }) => {
@@ -240,7 +241,7 @@ describe('lib/optimizely', function() {
           sinon.assert.calledWith(decisionService.createDecisionService, {
             userProfileService: userProfileServiceInstance,
             userProfileServiceAsync: undefined,
-            logger: createdLogger,
+            logger: sinon.match.any,
             cmabService,
             UNSTABLE_conditionEvaluators: undefined,
           });
@@ -272,7 +273,7 @@ describe('lib/optimizely', function() {
           sinon.assert.calledWith(decisionService.createDecisionService, {
             userProfileService: undefined,
             userProfileServiceAsync: undefined,
-            logger: createdLogger,
+            logger: sinon.match.any,
             UNSTABLE_conditionEvaluators: undefined,
             cmabService,
           });
diff --git a/lib/optimizely/index.ts b/lib/optimizely/index.ts
index c9a82b551..251c08b0e 100644
--- a/lib/optimizely/index.ts
+++ b/lib/optimizely/index.ts
@@ -1,5 +1,5 @@
 /**
- * Copyright 2020-2025, Optimizely
+ * Copyright 2020-2026, Optimizely
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -242,7 +242,7 @@ export default class Optimizely extends BaseService implements Client {
       userProfileService: userProfileService,
       userProfileServiceAsync: config.userProfileServiceAsync || undefined,
       cmabService: config.cmabService,
-      logger: this.logger,
+      logger: this.logger?.child(),
       UNSTABLE_conditionEvaluators: config.UNSTABLE_conditionEvaluators,
     });
 
diff --git a/lib/optimizely_user_context/index.tests.js b/lib/optimizely_user_context/index.tests.js
index 9f3597187..6eed2437e 100644
--- a/lib/optimizely_user_context/index.tests.js
+++ b/lib/optimizely_user_context/index.tests.js
@@ -48,6 +48,7 @@ var createLogger = () => ({
   warn: () => {},
   error: () => {},
   child: () => createLogger(),
+  setName: () => {},
 });
 
 const getOptlyInstance = ({ datafileObj, defaultDecideOptions }) => {