Index: trunk/test/unit/org/openstreetmap/josm/gui/layer/AutosaveTaskTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/layer/AutosaveTaskTest.java	(revision 13021)
+++ trunk/test/unit/org/openstreetmap/josm/gui/layer/AutosaveTaskTest.java	(revision 13024)
@@ -13,4 +13,5 @@
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.time.ZoneId;
@@ -77,4 +78,8 @@
         assertTrue(files.contains(layer2));
         assertFalse(files.contains(dir));
+        // cleanup
+        layer1.delete();
+        layer2.delete();
+        dir.delete();
     }
 
@@ -109,4 +114,8 @@
             }
         }
+        // cleanup
+        for (Path entry : Files.newDirectoryStream(task.getAutosaveDir(), "*.{osm,pid}")) {
+            Files.delete(entry);
+        }
     }