diff --git a/tests/support/util.tcl b/tests/support/util.tcl
index 7774dd99a..4b9caced8 100644
--- a/tests/support/util.tcl
+++ b/tests/support/util.tcl
@@ -353,7 +353,7 @@ proc colorstr {color str} {
             default {set colorcode {37}}
         }
         if {$colorcode ne {}} {
-            return "\033\[$b;${colorcode};40m$str\033\[0m"
+            return "\033\[$b;${colorcode};49m$str\033\[0m"
         }
     } else {
         return $str