Index: /trunk/test/unit/org/openstreetmap/josm/tools/ExceptionUtilTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/tools/ExceptionUtilTest.java	(revision 10486)
+++ /trunk/test/unit/org/openstreetmap/josm/tools/ExceptionUtilTest.java	(revision 10487)
@@ -9,4 +9,5 @@
 import java.net.URL;
 import java.net.UnknownHostException;
+import java.util.TimeZone;
 
 import org.junit.BeforeClass;
@@ -22,4 +23,5 @@
 import org.openstreetmap.josm.io.auth.CredentialsManager;
 import org.openstreetmap.josm.tools.date.DateUtils;
+import org.openstreetmap.josm.tools.date.DateUtilsTest;
 
 /**
@@ -124,4 +126,8 @@
         assertEquals("<html>Closing of changeset <strong>1</strong> failed <br>because it has already been closed.",
                 ExceptionUtil.explainConflict(new OsmApiException(code, "The changeset 1 was closed at xxx", "")));
+        assertEquals("<html>Closing of changeset <strong>1</strong> failed<br> because it has already been closed on 2016-01-01 12:34:56.",
+                ExceptionUtil.explainConflict(new OsmApiException(code, "The changeset 1 was closed at 2016-01-01 12:34:56 UTC", "")));
+        DateUtilsTest.setTimeZone(TimeZone.getTimeZone("Europe/Berlin"));
+        TimeZone.setDefault(TimeZone.getTimeZone("Europe/Berlin"));
         assertEquals("<html>Closing of changeset <strong>1</strong> failed<br> because it has already been closed on 2016-01-01 13:34:56.",
                 ExceptionUtil.explainConflict(new OsmApiException(code, "The changeset 1 was closed at 2016-01-01 12:34:56 UTC", "")));
