Adapted for 7.4.1 from

From 03e86defca1096cfbbf9962c1151773ac8767fcb Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@remirepo.net>
Date: Thu, 18 Oct 2018 14:58:51 +0200
Subject: [PATCH] Fix #3354

---
 src/TextUI/TestRunner.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/TextUI/TestRunner.php b/src/TextUI/TestRunner.php
index 00c2fcf860..bc167dd14e 100644
--- a/src/TextUI/TestRunner.php
+++ b/src/TextUI/TestRunner.php
@@ -158,7 +158,7 @@ class TestRunner extends BaseTestRunner
 
         $this->handleConfiguration($arguments);
 
-        if ($arguments['columns'] < 16) {
+        if (\is_int($arguments['columns']) && $arguments['columns'] < 16) {
             $arguments['columns'] = 16;
             $tooFewColumnsRequested = true;
         }