Index: trunk/test/data/tracks/tracks-extensions.gpx
===================================================================
--- trunk/test/data/tracks/tracks-extensions.gpx	(revision 15558)
+++ trunk/test/data/tracks/tracks-extensions.gpx	(revision 15560)
@@ -18,7 +18,7 @@
     <extensions>
       <test:tag>Track extension</test:tag>
-      <gpxx:TrackExtensions>
+      <gpxx:TrackExtension>
         <gpxx:DisplayColor>Red</gpxx:DisplayColor>
-      </gpxx:TrackExtensions>
+      </gpxx:TrackExtension>
     </extensions>
     <trkseg>
Index: trunk/test/unit/org/openstreetmap/josm/data/gpx/GpxTrackTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/gpx/GpxTrackTest.java	(revision 15558)
+++ trunk/test/unit/org/openstreetmap/josm/data/gpx/GpxTrackTest.java	(revision 15560)
@@ -48,5 +48,5 @@
         trk.invalidate();
         assertNull(trk.getColor());
-        ext.add("gpxx", "TrackExtensions").getExtensions().add("gpxx", "DisplayColor", "Blue");
+        ext.add("gpxx", "TrackExtension").getExtensions().add("gpxx", "DisplayColor", "Blue");
         trk.invalidate();
         assertEquals(trk.getColor(), Color.BLUE);
Index: trunk/test/unit/org/openstreetmap/josm/io/GpxWriterTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/io/GpxWriterTest.java	(revision 15558)
+++ trunk/test/unit/org/openstreetmap/josm/io/GpxWriterTest.java	(revision 15560)
@@ -191,7 +191,7 @@
                 "  <trk>\n" +
                 "    <extensions>\n" +
-                "      <gpxx:TrackExtensions>\n" +
+                "      <gpxx:TrackExtension>\n" +
                 "        <gpxx:DisplayColor>Red</gpxx:DisplayColor>\n" +
-                "      </gpxx:TrackExtensions>\n" +
+                "      </gpxx:TrackExtension>\n" +
                 "    </extensions>\n" +
                 "    <trkseg>\n" +
@@ -263,7 +263,7 @@
                 "  <trk>\n" +
                 "    <extensions>\n" +
-                "      <gpxx:TrackExtensions>\n" +
+                "      <gpxx:TrackExtension>\n" +
                 "        <gpxx:DisplayColor>Red</gpxx:DisplayColor>\n" +
-                "      </gpxx:TrackExtensions>\n" +
+                "      </gpxx:TrackExtension>\n" +
                 "    </extensions>\n" +
                 "    <trkseg>\n" +