diff --git a/js/client/modules/@arangodb/testing.js b/js/client/modules/@arangodb/testing.js
index 7e81082c02..a7725b53d9 100644
--- a/js/client/modules/@arangodb/testing.js
+++ b/js/client/modules/@arangodb/testing.js
@@ -511,11 +511,13 @@ function unitTest (cases, options) {
     print("not cleaning up since we didn't start the server ourselves\n");
   }
 
-  try {
-    yaml.safeDump(JSON.parse(JSON.stringify(results)));
-  } catch (err) {
-    print(RED + 'cannot dump results: ' + String(err) + RESET);
-    print(RED + require('internal').inspect(results) + RESET);
+  if (options.extremeVerbosity === true) {
+    try {
+      print(yaml.safeDump(JSON.parse(JSON.stringify(results))));
+    } catch (err) {
+      print(RED + 'cannot dump results: ' + String(err) + RESET);
+      print(RED + require('internal').inspect(results) + RESET);
+    }
   }
 
   if (jsonReply === true) {