diff --git a/test/Microsoft.AspNetCore.Mvc.FunctionalTests/xunit.runner.json b/test/Microsoft.AspNetCore.Mvc.FunctionalTests/xunit.runner.json
index 0d8a1f6a45..74f4888c0b 100644
--- a/test/Microsoft.AspNetCore.Mvc.FunctionalTests/xunit.runner.json
+++ b/test/Microsoft.AspNetCore.Mvc.FunctionalTests/xunit.runner.json
@@ -1,4 +1,5 @@
 {
+  "diagnosticMessages": true,
   "shadowCopy": false,
   "longRunningTestSeconds": 60
 }