diff --git a/test/xunit.runner.json b/test/xunit.runner.json
index d582de3bb7..d25ea9035a 100644
--- a/test/xunit.runner.json
+++ b/test/xunit.runner.json
@@ -1,5 +1,5 @@
 {
   "longRunningTestSeconds": 30,
   "diagnosticMessages": true,
-  "maxParallelThreads": 16
+  "maxParallelThreads": -1
 }