Index: trunk/test/functional/org/openstreetmap/josm/io/OsmServerBackreferenceReaderTest.java
===================================================================
--- trunk/test/functional/org/openstreetmap/josm/io/OsmServerBackreferenceReaderTest.java	(revision 18870)
+++ trunk/test/functional/org/openstreetmap/josm/io/OsmServerBackreferenceReaderTest.java	(revision 18893)
@@ -12,9 +12,9 @@
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.text.MessageFormat;
 import java.util.HashSet;
@@ -26,5 +26,4 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
-import org.openstreetmap.josm.JOSMFixture;
 import org.openstreetmap.josm.TestUtils;
 import org.openstreetmap.josm.data.APIDataSet;
@@ -43,4 +42,6 @@
 import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
 import org.openstreetmap.josm.spi.preferences.Config;
+import org.openstreetmap.josm.testutils.annotations.TestUser;
+import org.openstreetmap.josm.tools.JosmRuntimeException;
 import org.openstreetmap.josm.tools.Logging;
 
@@ -52,4 +53,6 @@
  */
 @SuppressFBWarnings(value = "CRLF_INJECTION_LOGS")
+@org.openstreetmap.josm.testutils.annotations.OsmApi(org.openstreetmap.josm.testutils.annotations.OsmApi.APIType.DEV)
+@TestUser
 class OsmServerBackreferenceReaderTest {
     private static final Logger logger = Logger.getLogger(OsmServerBackreferenceReader.class.getName());
@@ -76,5 +79,5 @@
         }
         fail("Cannot find relation "+i);
-        return null;
+        throw new JosmRuntimeException("Cannot reach this point due to fail() above");
     }
 
@@ -166,6 +169,4 @@
         logger.info("initializing ...");
 
-        JOSMFixture.createFunctionalTestFixture().init();
-
         Config.getPref().put("osm-server.auth-method", "basic");
 
@@ -197,5 +198,5 @@
         try (
             PrintWriter pw = new PrintWriter(
-                    new OutputStreamWriter(new FileOutputStream(dataSetCacheOutputFile), StandardCharsets.UTF_8)
+                    new OutputStreamWriter(Files.newOutputStream(dataSetCacheOutputFile.toPath()), StandardCharsets.UTF_8)
         )) {
             logger.info(MessageFormat.format("caching test data set in ''{0}'' ...", dataSetCacheOutputFile.toString()));