diff --git a/tests/test-sessions/test-infinispan-sessions/src/test/java/org/eclipse/jetty/server/session/InfinispanTestSupport.java b/tests/test-sessions/test-infinispan-sessions/src/test/java/org/eclipse/jetty/server/session/InfinispanTestSupport.java
index cb12972ced6..bf822dd7e7e 100644
--- a/tests/test-sessions/test-infinispan-sessions/src/test/java/org/eclipse/jetty/server/session/InfinispanTestSupport.java
+++ b/tests/test-sessions/test-infinispan-sessions/src/test/java/org/eclipse/jetty/server/session/InfinispanTestSupport.java
@@ -20,9 +20,13 @@ package org.eclipse.jetty.server.session;
 
 import java.io.File;
 import java.lang.annotation.ElementType;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Properties;
 
-import org.eclipse.jetty.toolchain.test.MavenTestingUtils;
+import org.eclipse.jetty.toolchain.test.FS;
+import org.eclipse.jetty.toolchain.test.jupiter.WorkDir;
+import org.eclipse.jetty.toolchain.test.jupiter.WorkDirExtension;
 import org.eclipse.jetty.util.IO;
 import org.hibernate.search.cfg.Environment;
 import org.hibernate.search.cfg.SearchMapping;
@@ -33,6 +37,7 @@ import org.infinispan.configuration.cache.Index;
 import org.infinispan.configuration.global.GlobalConfigurationBuilder;
 import org.infinispan.manager.DefaultCacheManager;
 import org.infinispan.manager.EmbeddedCacheManager;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -40,8 +45,10 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 /**
  * InfinispanTestSupport
  */
+@ExtendWith(WorkDirExtension.class)
 public class InfinispanTestSupport
 {
+    public WorkDir workDir;
     public static final String DEFAULT_CACHE_NAME = "session_test_cache";
     public Cache _cache;
 
@@ -95,22 +102,20 @@ public class InfinispanTestSupport
 
     public void setup() throws Exception
     {
-        File testdir = MavenTestingUtils.getTargetTestingDir();
-        File tmp = new File(testdir, "indexes");
-        IO.delete(tmp);
-        tmp.mkdirs();
+        Path root = workDir.getEmptyPathDir();
+        Path indexesDir = root.resolve("indexes");
+        FS.ensureDirExists(indexesDir);
 
         SearchMapping mapping = new SearchMapping();
         mapping.entity(SessionData.class).indexed().providedId().property("expiry", ElementType.FIELD).field();
         Properties properties = new Properties();
         properties.put(Environment.MODEL_MAPPING, mapping);
-        properties.put("hibernate.search.default.indexBase", tmp.getAbsolutePath());
+        properties.put("hibernate.search.default.indexBase", indexesDir.toString());
 
         if (_useFileStore)
         {
-            _tmpdir = File.createTempFile("infini", "span");
-            _tmpdir.delete();
-            _tmpdir.mkdir();
+            Path tmpDir = Files.createTempDirectory("infinispan");
+            _tmpdir = tmpDir.toFile();
 
             ConfigurationChildBuilder b = _builder.indexing()
                 .index(Index.ALL)
diff --git a/tests/test-webapps/test-jetty-webapp/src/test/java/org/eclipse/jetty/TestServer.java b/tests/test-webapps/test-jetty-webapp/src/test/java/org/eclipse/jetty/TestServer.java
index 8ae62372596..28fd6547db4 100644
--- a/tests/test-webapps/test-jetty-webapp/src/test/java/org/eclipse/jetty/TestServer.java
+++ b/tests/test-webapps/test-jetty-webapp/src/test/java/org/eclipse/jetty/TestServer.java
@@ -18,7 +18,6 @@
 
 package org.eclipse.jetty;
 
-import java.io.File;
 import java.io.IOException;
 import java.lang.management.ManagementFactory;
 import java.nio.file.FileSystems;
@@ -116,8 +115,8 @@ public class TestServer
         login.setConfig(jettyRoot.resolve("tests/test-webapps/test-jetty-webapp/src/main/config/demo-base/etc/realm.properties").toString());
         server.addBean(login);
 
-        File log = File.createTempFile("jetty-yyyy_mm_dd", "log");
-        CustomRequestLog requestLog = new CustomRequestLog(log.toString());
+        Path logPath = Files.createTempFile("jetty-yyyy_mm_dd", "log");
+        CustomRequestLog requestLog = new CustomRequestLog(logPath.toString());
         server.setRequestLog(requestLog);
 
         server.setStopAtShutdown(true);
@@ -127,15 +126,11 @@ public class TestServer
         webapp.setParentLoaderPriority(true);
         webapp.setResourceBase(jettyRoot.resolve("tests/test-webapps/test-jetty-webapp/src/main/webapp").toString());
         webapp.setAttribute("testAttribute", "testValue");
-        File sessiondir = File.createTempFile("sessions", null);
-        if (sessiondir.exists())
-            sessiondir.delete();
-        sessiondir.mkdir();
-        sessiondir.deleteOnExit();
+        Path sessionDir = Files.createTempDirectory("sessions");
         DefaultSessionCache ss = new DefaultSessionCache(webapp.getSessionHandler());
         FileSessionDataStore sds = new FileSessionDataStore();
         ss.setSessionDataStore(sds);
-        sds.setStoreDir(sessiondir);
+        sds.setStoreDir(sessionDir.toFile());
         webapp.getSessionHandler().setSessionCache(ss);
 
         contexts.addHandler(webapp);