diff --git a/MyTracksTest/src/com/google/android/apps/mytracks/services/SignalStrengthTaskFactoryTest.java b/MyTracksTest/src/com/google/android/apps/mytracks/services/SignalStrengthTaskFactoryTest.java
index 73da7aab9..e37684f64 100644
--- a/MyTracksTest/src/com/google/android/apps/mytracks/services/SignalStrengthTaskFactoryTest.java
+++ b/MyTracksTest/src/com/google/android/apps/mytracks/services/SignalStrengthTaskFactoryTest.java
@@ -26,6 +26,9 @@ import android.test.AndroidTestCase;
  * @author Rodrigo Damazio
  */
 public class SignalStrengthTaskFactoryTest extends AndroidTestCase {
+  /**
+   * Mock version of the {@link ApiFeatures} class.
+   */
   private static class MockApiFeatures extends ApiFeatures {
     private boolean hasModernStrength;
 
diff --git a/MyTracksTest/src/com/google/android/apps/mytracks/services/StatusAnnouncerFactoryTest.java b/MyTracksTest/src/com/google/android/apps/mytracks/services/StatusAnnouncerFactoryTest.java
index ef7b4ccd8..304002a8d 100644
--- a/MyTracksTest/src/com/google/android/apps/mytracks/services/StatusAnnouncerFactoryTest.java
+++ b/MyTracksTest/src/com/google/android/apps/mytracks/services/StatusAnnouncerFactoryTest.java
@@ -28,8 +28,9 @@ import android.test.AndroidTestCase;
  * @author Rodrigo Damazio
  */
 public class StatusAnnouncerFactoryTest extends AndroidTestCase {
-
-
+  /**
+   * Mock version of the {@link ApiFeatures} class.
+   */
   private class MockApiFeatures extends ApiFeatures {
     private boolean hasTts;