diff --git a/web/src/engine/predictive-text/worker-thread/src/main/correction/context-tokenization.ts b/web/src/engine/predictive-text/worker-thread/src/main/correction/context-tokenization.ts
index 66e634d8af..9a115b3e58 100644
--- a/web/src/engine/predictive-text/worker-thread/src/main/correction/context-tokenization.ts
+++ b/web/src/engine/predictive-text/worker-thread/src/main/correction/context-tokenization.ts
@@ -1,3 +1,12 @@
+/*
+ * Keyman is copyright (C) SIL Global. MIT License.
+ *
+ * Created by jahorton on 2025-07-30
+ *
+ * Represents cached data about one potential tokenization of contents of
+ * the sliding context window for one specific instance of context state.
+ */
+
 import { ContextToken } from './context-token.js';
 import { TrackedContextStateAlignment } from './context-tracker.js';
 
@@ -36,7 +45,7 @@ export class ContextTokenization {
    */
   get exampleInput(): string[] {
     return this.tokens
-      // Hide any tokens representing wordbreaks.  (Thinking ahead to phrase-level possibilities)
+      // Hide any tokens representing invisible wordbreaks.  (Thinking ahead to phrase-level possibilities)
       .filter(token => token.exampleInput !== null)
       .map(token => token.exampleInput);
   }
diff --git a/web/src/engine/predictive-text/worker-thread/src/tests/mocha/cases/edit-distance/context-tokenization.js b/web/src/engine/predictive-text/worker-thread/src/tests/mocha/cases/edit-distance/context-tokenization.tests.js
similarity index 90%
rename from web/src/engine/predictive-text/worker-thread/src/tests/mocha/cases/edit-distance/context-tokenization.js
rename to web/src/engine/predictive-text/worker-thread/src/tests/mocha/cases/edit-distance/context-tokenization.tests.js
index 8ba132ed56..6b0e0fffa2 100644
--- a/web/src/engine/predictive-text/worker-thread/src/tests/mocha/cases/edit-distance/context-tokenization.js
+++ b/web/src/engine/predictive-text/worker-thread/src/tests/mocha/cases/edit-distance/context-tokenization.tests.js
@@ -1,13 +1,21 @@
+/*
+ * Keyman is copyright (C) SIL Global. MIT License.
+ *
+ * Created by jahorton on 2025-07-30
+ *
+ * This file contains low-level tests designed to validate the behavior of the
+ * of the ContextTokenization class and its integration with the lower-level
+ * classes that it utilizes.
+ */
+
 import { assert } from 'chai';
 
-import { ContextToken } from '#./correction/context-token.js';
-import { ContextTokenization } from '#./correction/context-tokenization.js';
-
-import * as models from '#./models/index.js';
 import { default as defaultBreaker } from '@keymanapp/models-wordbreakers';
 import { jsonFixture } from '@keymanapp/common-test-resources/model-helpers.mjs';
 
-var TrieModel = models.TrieModel;
+import { ContextToken } from '#./correction/context-token.js';
+import { ContextTokenization } from '#./correction/context-tokenization.js';
+import { TrieModel } from '#./models/index.js';
 
 var plainModel = new TrieModel(jsonFixture('models/tries/english-1000'),
   {wordBreaker: defaultBreaker});