diff --git a/testing/src/main/scala/sbt/JUnitXmlTestsListener.scala b/testing/src/main/scala/sbt/JUnitXmlTestsListener.scala
index a59e44ee7..41ab2c5a7 100644
--- a/testing/src/main/scala/sbt/JUnitXmlTestsListener.scala
+++ b/testing/src/main/scala/sbt/JUnitXmlTestsListener.scala
@@ -226,9 +226,11 @@ class JUnitXmlTestsListener(val outputDir: String, logger: Logger) extends Tests
     d.truncatedTo(ChronoUnit.SECONDS).format(DateTimeFormatter.ISO_LOCAL_DATE_TIME)
 
   private def writeSuite() = {
-    val file = new File(targetDir, s"${normalizeName(withTestSuite(_.name))}.xml").getAbsolutePath
+    val legacyFile = new File(targetDir, s"${normalizeName(withTestSuite(_.name))}.xml").getAbsolutePath
+    val file = new File(targetDir, s"TEST-${normalizeName(withTestSuite(_.name))}.xml").getAbsolutePath
     // TODO would be nice to have a logger and log this with level debug
     // System.err.println("Writing JUnit XML test report: " + file)
+    XML.save(legacyFile, withTestSuite(_.stop()), "UTF-8", true, null)
     XML.save(file, withTestSuite(_.stop()), "UTF-8", true, null)
     testSuite.remove()
   }