diff --git a/src/DebugBar/Resources/widgets.css b/src/DebugBar/Resources/widgets.css
index 082d6d6..82e701b 100644
--- a/src/DebugBar/Resources/widgets.css
+++ b/src/DebugBar/Resources/widgets.css
@@ -144,6 +144,7 @@ ul.phpdebugbar-widgets-timeline {
       background: none;
       text-shadow: none;
       font-weight: normal;
+      white-space: pre;
     }
     ul.phpdebugbar-widgets-timeline li span.phpdebugbar-widgets-collector {
       left: initial;