diff --git a/lib/player.js b/lib/player.js
index cbcaed70a0..bdb52cbfed 100644
--- a/lib/player.js
+++ b/lib/player.js
@@ -4040,20 +4040,24 @@ shaka.Player = class extends shaka.util.FakeEventTarget {
     const LanguageUtils = shaka.util.LanguageUtils;
     const inputlanguage = LanguageUtils.normalize(language);
     const chaptersTracks = this.getChaptersTracks_();
-    const chaptersTrack = chaptersTracks
-        .find((t) => LanguageUtils.normalize(t.language) == inputlanguage);
-    if (!chaptersTrack || !chaptersTrack.cues) {
+    const chaptersTracksWithLanguage = chaptersTracks
+        .filter((t) => LanguageUtils.normalize(t.language) == inputlanguage);
+    if (!chaptersTracksWithLanguage || !chaptersTracksWithLanguage.length) {
       return [];
     }
     const chapters = [];
-    for (const cue of chaptersTrack.cues) {
-      /** @type {shaka.extern.Chapter} */
-      const chapter = {
-        title: cue.text,
-        startTime: cue.startTime,
-        endTime: cue.endTime,
-      };
-      chapters.push(chapter);
+    for (const chaptersTrack of chaptersTracksWithLanguage) {
+      if (chaptersTrack && chaptersTrack.cues) {
+        for (const cue of chaptersTrack.cues) {
+          /** @type {shaka.extern.Chapter} */
+          const chapter = {
+            title: cue.text,
+            startTime: cue.startTime,
+            endTime: cue.endTime,
+          };
+          chapters.push(chapter);
+        }
+      }
     }
     return chapters;
   }
diff --git a/test/player_integration.js b/test/player_integration.js
index 83cfad0959..a9a0161718 100644
--- a/test/player_integration.js
+++ b/test/player_integration.js
@@ -1063,9 +1063,9 @@ describe('Player', () => {
     it('add external chapters in vtt format', async () => {
       await player.load('test:sintel_no_text_compiled');
       const locationUri = new goog.Uri(location.href);
-      const partialUri = new goog.Uri('/base/test/test/assets/chapters.vtt');
-      const absoluteUri = locationUri.resolve(partialUri);
-      await player.addChaptersTrack(absoluteUri.toString(), 'en');
+      const partialUri1 = new goog.Uri('/base/test/test/assets/chapters.vtt');
+      const absoluteUri1 = locationUri.resolve(partialUri1);
+      await player.addChaptersTrack(absoluteUri1.toString(), 'en');
 
       await shaka.test.Util.delay(1.5);
 
@@ -1078,11 +1078,44 @@ describe('Player', () => {
       const chapter2 = chapters[1];
       expect(chapter2.title).toBe('Chapter 2');
       expect(chapter2.startTime).toBe(5);
-      expect(chapter2.endTime).toBe(30);
+      expect(chapter2.endTime).toBe(10);
       const chapter3 = chapters[2];
       expect(chapter3.title).toBe('Chapter 3');
-      expect(chapter3.startTime).toBe(30);
-      expect(chapter3.endTime).toBe(61.349);
+      expect(chapter3.startTime).toBe(10);
+      expect(chapter3.endTime).toBe(20);
+
+      const partialUri2 = new goog.Uri('/base/test/test/assets/chapters2.vtt');
+      const absoluteUri2 = locationUri.resolve(partialUri2);
+      await player.addChaptersTrack(absoluteUri2.toString(), 'en');
+
+      await shaka.test.Util.delay(1.5);
+
+      const chaptersUpdated = player.getChapters('en');
+      expect(chaptersUpdated.length).toBe(6);
+      const chapterUpdated1 = chaptersUpdated[0];
+      expect(chapterUpdated1.title).toBe('Chapter 1');
+      expect(chapterUpdated1.startTime).toBe(0);
+      expect(chapterUpdated1.endTime).toBe(5);
+      const chapterUpdated2 = chaptersUpdated[1];
+      expect(chapterUpdated2.title).toBe('Chapter 2');
+      expect(chapterUpdated2.startTime).toBe(5);
+      expect(chapterUpdated2.endTime).toBe(10);
+      const chapterUpdated3 = chaptersUpdated[2];
+      expect(chapterUpdated3.title).toBe('Chapter 3');
+      expect(chapterUpdated3.startTime).toBe(10);
+      expect(chapterUpdated3.endTime).toBe(20);
+      const chapterUpdated4 = chaptersUpdated[3];
+      expect(chapterUpdated4.title).toBe('Chapter 4');
+      expect(chapterUpdated4.startTime).toBe(20);
+      expect(chapterUpdated4.endTime).toBe(30);
+      const chapterUpdated5 = chaptersUpdated[4];
+      expect(chapterUpdated5.title).toBe('Chapter 5');
+      expect(chapterUpdated5.startTime).toBe(30);
+      expect(chapterUpdated5.endTime).toBe(40);
+      const chapterUpdated6 = chaptersUpdated[5];
+      expect(chapterUpdated6.title).toBe('Chapter 6');
+      expect(chapterUpdated6.startTime).toBe(40);
+      expect(chapterUpdated6.endTime).toBe(61.349);
     });
 
     it('add external chapters in srt format', async () => {
@@ -1090,11 +1123,11 @@ describe('Player', () => {
       const locationUri = new goog.Uri(location.href);
       const partialUri = new goog.Uri('/base/test/test/assets/chapters.srt');
       const absoluteUri = locationUri.resolve(partialUri);
-      await player.addChaptersTrack(absoluteUri.toString(), 'en');
+      await player.addChaptersTrack(absoluteUri.toString(), 'es');
 
       await shaka.test.Util.delay(1.5);
 
-      const chapters = player.getChapters('en');
+      const chapters = player.getChapters('es');
       expect(chapters.length).toBe(3);
       const chapter1 = chapters[0];
       expect(chapter1.title).toBe('Chapter 1');
diff --git a/test/player_src_equals_integration.js b/test/player_src_equals_integration.js
index d1d7cd496a..9599d18643 100644
--- a/test/player_src_equals_integration.js
+++ b/test/player_src_equals_integration.js
@@ -330,9 +330,9 @@ describe('Player Src Equals', () => {
     await loadWithSrcEquals(SMALL_MP4_CONTENT_URI, /* startTime= */ null);
 
     const locationUri = new goog.Uri(location.href);
-    const partialUri = new goog.Uri('/base/test/test/assets/chapters.vtt');
-    const absoluteUri = locationUri.resolve(partialUri);
-    await player.addChaptersTrack(absoluteUri.toString(), 'en');
+    const partialUri1 = new goog.Uri('/base/test/test/assets/chapters.vtt');
+    const absoluteUri1 = locationUri.resolve(partialUri1);
+    await player.addChaptersTrack(absoluteUri1.toString(), 'en');
 
     await shaka.test.Util.delay(1.5);
 
@@ -345,11 +345,44 @@ describe('Player Src Equals', () => {
     const chapter2 = chapters[1];
     expect(chapter2.title).toBe('Chapter 2');
     expect(chapter2.startTime).toBe(5);
-    expect(chapter2.endTime).toBe(30);
+    expect(chapter2.endTime).toBe(10);
     const chapter3 = chapters[2];
     expect(chapter3.title).toBe('Chapter 3');
-    expect(chapter3.startTime).toBe(30);
-    expect(chapter3.endTime).toBe(61.349);
+    expect(chapter3.startTime).toBe(10);
+    expect(chapter3.endTime).toBe(20);
+
+    const partialUri2 = new goog.Uri('/base/test/test/assets/chapters2.vtt');
+    const absoluteUri2 = locationUri.resolve(partialUri2);
+    await player.addChaptersTrack(absoluteUri2.toString(), 'en');
+
+    await shaka.test.Util.delay(1.5);
+
+    const chaptersUpdated = player.getChapters('en');
+    expect(chaptersUpdated.length).toBe(6);
+    const chapterUpdated1 = chaptersUpdated[0];
+    expect(chapterUpdated1.title).toBe('Chapter 1');
+    expect(chapterUpdated1.startTime).toBe(0);
+    expect(chapterUpdated1.endTime).toBe(5);
+    const chapterUpdated2 = chaptersUpdated[1];
+    expect(chapterUpdated2.title).toBe('Chapter 2');
+    expect(chapterUpdated2.startTime).toBe(5);
+    expect(chapterUpdated2.endTime).toBe(10);
+    const chapterUpdated3 = chaptersUpdated[2];
+    expect(chapterUpdated3.title).toBe('Chapter 3');
+    expect(chapterUpdated3.startTime).toBe(10);
+    expect(chapterUpdated3.endTime).toBe(20);
+    const chapterUpdated4 = chaptersUpdated[3];
+    expect(chapterUpdated4.title).toBe('Chapter 4');
+    expect(chapterUpdated4.startTime).toBe(20);
+    expect(chapterUpdated4.endTime).toBe(30);
+    const chapterUpdated5 = chaptersUpdated[4];
+    expect(chapterUpdated5.title).toBe('Chapter 5');
+    expect(chapterUpdated5.startTime).toBe(30);
+    expect(chapterUpdated5.endTime).toBe(40);
+    const chapterUpdated6 = chaptersUpdated[5];
+    expect(chapterUpdated6.title).toBe('Chapter 6');
+    expect(chapterUpdated6.startTime).toBe(40);
+    expect(chapterUpdated6.endTime).toBe(61.349);
   });
 
   it('add external chapters in srt format', async () => {
@@ -358,11 +391,11 @@ describe('Player Src Equals', () => {
     const locationUri = new goog.Uri(location.href);
     const partialUri = new goog.Uri('/base/test/test/assets/chapters.srt');
     const absoluteUri = locationUri.resolve(partialUri);
-    await player.addChaptersTrack(absoluteUri.toString(), 'en');
+    await player.addChaptersTrack(absoluteUri.toString(), 'es');
 
     await shaka.test.Util.delay(1.5);
 
-    const chapters = player.getChapters('en');
+    const chapters = player.getChapters('es');
     expect(chapters.length).toBe(3);
     const chapter1 = chapters[0];
     expect(chapter1.title).toBe('Chapter 1');
diff --git a/test/test/assets/chapters.vtt b/test/test/assets/chapters.vtt
index 882e540053..39b6c78ffb 100644
--- a/test/test/assets/chapters.vtt
+++ b/test/test/assets/chapters.vtt
@@ -3,8 +3,8 @@ WEBVTT
 00:00.000 --> 00:05.000
 Chapter 1
 
-00:05.000 --> 00:30.000
+00:05.000 --> 00:10.000
 Chapter 2
 
-00:30.000 --> 01:01.349
+00:10.000 --> 00:20.000
 Chapter 3
diff --git a/test/test/assets/chapters2.vtt b/test/test/assets/chapters2.vtt
new file mode 100644
index 0000000000..c86fd04422
--- /dev/null
+++ b/test/test/assets/chapters2.vtt
@@ -0,0 +1,10 @@
+WEBVTT
+
+00:20.000 --> 00:30.000
+Chapter 4
+
+00:30.000 --> 00:40.000
+Chapter 5
+
+00:40.000 --> 01:01.349
+Chapter 6