--- a/devtools/client/netmonitor/test/browser_net_timing-division.js
+++ b/devtools/client/netmonitor/test/browser_net_timing-division.js
@@ -1,18 +1,22 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 "use strict";
 
 /**
- * Tests if timing intervals are divided againts seconds when appropriate.
+ * Tests if timing intervals are divided against seconds when appropriate.
  */
+add_task(async function () {
+  // Show only few columns, so there is enough space
+  // for the waterfall.
+  await pushPref("devtools.netmonitor.visibleColumns",
+    '["status", "contentSize", "waterfall"]');
 
-add_task(async function () {
   let { tab, monitor } = await initNetMonitor(CUSTOM_GET_URL);
   info("Starting test... ");
 
   let { document, store, windowRequire } = monitor.panelWin;
   let Actions = windowRequire("devtools/client/netmonitor/src/actions/index");
   store.dispatch(Actions.batchEnable(false));
 
   let wait = waitForNetworkEvents(monitor, 2);