Index: trunk/test/unit/org/openstreetmap/josm/data/vector/VectorDataSetTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/vector/VectorDataSetTest.java	(revision 18477)
+++ trunk/test/unit/org/openstreetmap/josm/data/vector/VectorDataSetTest.java	(revision 18478)
@@ -14,5 +14,5 @@
 import org.awaitility.Durations;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.RepeatedTest;
 import org.junit.jupiter.api.extension.RegisterExtension;
 import org.openstreetmap.josm.TestUtils;
@@ -99,5 +99,9 @@
     }
 
-    @Test
+    /**
+     * This failed about 1/2 times.
+     * It tests for node deduplication.
+     */
+    @RepeatedTest(10)
     void testNodeDeduplication() {
         final VectorDataSet dataSet = this.layer.getData();