Index: trunk/test/unit/org/openstreetmap/josm/gui/io/AsynchronousUploadPrimitivesTaskTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/io/AsynchronousUploadPrimitivesTaskTest.java	(revision 13211)
+++ trunk/test/unit/org/openstreetmap/josm/gui/io/AsynchronousUploadPrimitivesTaskTest.java	(revision 13219)
@@ -2,10 +2,11 @@
 package org.openstreetmap.josm.gui.io;
 
-import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import java.util.Optional;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
 import org.junit.Rule;
-import org.junit.Before;
-import org.junit.After;
 import org.junit.Test;
-import org.junit.Assert;
 import org.openstreetmap.josm.data.APIDataSet;
 import org.openstreetmap.josm.data.coor.LatLon;
@@ -18,6 +19,9 @@
 import org.openstreetmap.josm.testutils.JOSMTestRules;
 
-import java.util.Optional;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 
+/**
+ * Unit tests of {@link AsynchronousUploadPrimitivesTask}.
+ */
 public class AsynchronousUploadPrimitivesTaskTest {
 
@@ -62,4 +66,5 @@
         strategy = null;
         changeset = null;
+        uploadPrimitivesTask.cancel();
         uploadPrimitivesTask = null;
     }