diff --git a/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/AdvancedFrameProcessorPixelTest.java b/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/AdvancedFrameProcessorPixelTest.java
index 4af4d6d833..635c4091b9 100644
--- a/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/AdvancedFrameProcessorPixelTest.java
+++ b/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/AdvancedFrameProcessorPixelTest.java
@@ -90,7 +90,7 @@ public final class AdvancedFrameProcessorPixelTest {
 
   @Test
   public void updateProgramAndDraw_noEdits_producesExpectedOutput() throws Exception {
-    final String testId = "updateProgramAndDraw_noEdits";
+    String testId = "updateProgramAndDraw_noEdits";
     Matrix identityMatrix = new Matrix();
     advancedFrameProcessor = new AdvancedFrameProcessor(getApplicationContext(), identityMatrix);
     advancedFrameProcessor.initialize(inputTexId);
@@ -111,7 +111,7 @@ public final class AdvancedFrameProcessorPixelTest {
 
   @Test
   public void updateProgramAndDraw_translateRight_producesExpectedOutput() throws Exception {
-    final String testId = "updateProgramAndDraw_translateRight";
+    String testId = "updateProgramAndDraw_translateRight";
     Matrix translateRightMatrix = new Matrix();
     translateRightMatrix.postTranslate(/* dx= */ 1, /* dy= */ 0);
     advancedFrameProcessor =
@@ -135,7 +135,7 @@ public final class AdvancedFrameProcessorPixelTest {
 
   @Test
   public void updateProgramAndDraw_scaleNarrow_producesExpectedOutput() throws Exception {
-    final String testId = "updateProgramAndDraw_scaleNarrow";
+    String testId = "updateProgramAndDraw_scaleNarrow";
     Matrix scaleNarrowMatrix = new Matrix();
     scaleNarrowMatrix.postScale(.5f, 1.2f);
     advancedFrameProcessor = new AdvancedFrameProcessor(getApplicationContext(), scaleNarrowMatrix);
@@ -158,7 +158,7 @@ public final class AdvancedFrameProcessorPixelTest {
 
   @Test
   public void updateProgramAndDraw_rotate90_producesExpectedOutput() throws Exception {
-    final String testId = "updateProgramAndDraw_rotate90";
+    String testId = "updateProgramAndDraw_rotate90";
     Matrix rotate90Matrix = new Matrix();
     rotate90Matrix.postRotate(/* degrees= */ 90);
     advancedFrameProcessor = new AdvancedFrameProcessor(getApplicationContext(), rotate90Matrix);
diff --git a/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/FrameProcessorChainPixelTest.java b/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/FrameProcessorChainPixelTest.java
index ad263888d4..87429cc7f1 100644
--- a/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/FrameProcessorChainPixelTest.java
+++ b/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/FrameProcessorChainPixelTest.java
@@ -85,7 +85,7 @@ public final class FrameProcessorChainPixelTest {
 
   @Test
   public void processData_noEdits_producesExpectedOutput() throws Exception {
-    final String testId = "processData_noEdits";
+    String testId = "processData_noEdits";
     setUpAndPrepareFirstFrame();
     Bitmap expectedBitmap = BitmapTestUtil.readBitmap(FIRST_FRAME_PNG_ASSET_STRING);
 
@@ -103,7 +103,7 @@ public final class FrameProcessorChainPixelTest {
   @Test
   public void processData_withAdvancedFrameProcessor_translateRight_producesExpectedOutput()
       throws Exception {
-    final String testId = "processData_withAdvancedFrameProcessor_translateRight";
+    String testId = "processData_withAdvancedFrameProcessor_translateRight";
     Matrix translateRightMatrix = new Matrix();
     translateRightMatrix.postTranslate(/* dx= */ 1, /* dy= */ 0);
     GlFrameProcessor glFrameProcessor =
@@ -126,7 +126,7 @@ public final class FrameProcessorChainPixelTest {
   @Test
   public void processData_withAdvancedAndScaleToFitFrameProcessors_producesExpectedOutput()
       throws Exception {
-    final String testId = "processData_withAdvancedAndScaleToFitFrameProcessors";
+    String testId = "processData_withAdvancedAndScaleToFitFrameProcessors";
     Matrix translateRightMatrix = new Matrix();
     translateRightMatrix.postTranslate(/* dx= */ 1, /* dy= */ 0);
     GlFrameProcessor translateRightFrameProcessor =
@@ -153,7 +153,7 @@ public final class FrameProcessorChainPixelTest {
   @Test
   public void processData_withScaleToFitAndAdvancedFrameProcessors_producesExpectedOutput()
       throws Exception {
-    final String testId = "processData_withScaleToFitAndAdvancedFrameProcessors";
+    String testId = "processData_withScaleToFitAndAdvancedFrameProcessors";
     GlFrameProcessor rotate45FrameProcessor =
         new ScaleToFitFrameProcessor.Builder(getApplicationContext())
             .setRotationDegrees(45)
@@ -180,7 +180,7 @@ public final class FrameProcessorChainPixelTest {
   @Test
   public void processData_withScaleToFitFrameProcessor_requestOutputHeight_producesExpectedOutput()
       throws Exception {
-    final String testId = "processData_withScaleToFitFrameProcessor_requestOutputHeight";
+    String testId = "processData_withScaleToFitFrameProcessor_requestOutputHeight";
     // TODO(b/213190310): After creating a Presentation class, move VideoSamplePipeline
     //  resolution-based adjustments (ex. in cl/419619743) to that Presentation class, so we can
     //  test that rotation doesn't distort the image.
@@ -204,7 +204,7 @@ public final class FrameProcessorChainPixelTest {
   @Test
   public void processData_withScaleToFitFrameProcessor_rotate45_producesExpectedOutput()
       throws Exception {
-    final String testId = "processData_withScaleToFitFrameProcessor_rotate45";
+    String testId = "processData_withScaleToFitFrameProcessor_rotate45";
     // TODO(b/213190310): After creating a Presentation class, move VideoSamplePipeline
     //  resolution-based adjustments (ex. in cl/419619743) to that Presentation class, so we can
     //  test that rotation doesn't distort the image.
diff --git a/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/mh/TransformationTest.java b/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/mh/TransformationTest.java
index 3b1378d387..7570523e9c 100644
--- a/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/mh/TransformationTest.java
+++ b/library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/mh/TransformationTest.java
@@ -46,8 +46,7 @@ public class TransformationTest {
 
   @Test
   public void transform() throws Exception {
-    final String testId = TAG + "_transform";
-
+    String testId = TAG + "_transform";
     Context context = ApplicationProvider.getApplicationContext();
     Transformer transformer = new Transformer.Builder(context).build();
     // TODO(b/223381524): Remove analysis failure suppression after ssim calculation doesn't fail.
@@ -60,8 +59,7 @@ public class TransformationTest {
 
   @Test
   public void transformWithDecodeEncode() throws Exception {
-    final String testId = TAG + "_transformForceCodecUse";
-
+    String testId = TAG + "_transformForceCodecUse";
     Context context = ApplicationProvider.getApplicationContext();
     Transformer transformer =
         new Transformer.Builder(context)
@@ -102,7 +100,7 @@ public class TransformationTest {
 
   @Test
   public void transformToSpecificBitrate() throws Exception {
-    final String testId = TAG + "_transformWithSpecificBitrate";
+    String testId = TAG + "_transformWithSpecificBitrate";
     Context context = ApplicationProvider.getApplicationContext();
     Transformer transformer =
         new Transformer.Builder(context)
@@ -123,8 +121,7 @@ public class TransformationTest {
 
   @Test
   public void transform4K60() throws Exception {
-    final String testId = TAG + "_transform4K60";
-
+    String testId = TAG + "_transform4K60";
     Context context = ApplicationProvider.getApplicationContext();
     Transformer transformer = new Transformer.Builder(context).build();
     // TODO(b/223381524): Remove analysis failure suppression after ssim calculation doesn't fail.
@@ -137,8 +134,7 @@ public class TransformationTest {
 
   @Test
   public void transformNoAudio() throws Exception {
-    final String testId = TAG + "_transformNoAudio";
-
+    String testId = TAG + "_transformNoAudio";
     Context context = ApplicationProvider.getApplicationContext();
     Transformer transformer = new Transformer.Builder(context).setRemoveAudio(true).build();
     // TODO(b/223381524): Remove analysis failure suppression after ssim calculation doesn't fail.
@@ -151,8 +147,7 @@ public class TransformationTest {
 
   @Test
   public void transformNoVideo() throws Exception {
-    final String testId = TAG + "_transformNoVideo";
-
+    String testId = TAG + "_transformNoVideo";
     Context context = ApplicationProvider.getApplicationContext();
     Transformer transformer = new Transformer.Builder(context).setRemoveVideo(true).build();
     new TransformerAndroidTestRunner.Builder(context, transformer)
@@ -162,7 +157,7 @@ public class TransformationTest {
 
   @Test
   public void transformSef() throws Exception {
-    final String testId = TAG + "_transformSef";
+    String testId = TAG + "_transformSef";
 
     if (Util.SDK_INT < 25) {
       // TODO(b/210593256): Remove test skipping after removing the MediaMuxer dependency.