diff --git a/test/parallel/test-util-format.js b/test/parallel/test-util-format.js
index cc48432e87a794c..17564e5d72ffb55 100644
--- a/test/parallel/test-util-format.js
+++ b/test/parallel/test-util-format.js
@@ -535,7 +535,7 @@ assert.strictEqual(
 
 assert.strictEqual(
   util.formatWithOptions({ colors: true }, '%cfoo', 'color: red'),
-  '\x1b[31m' + 'foo' + '\x1b[0m'
+  '\x1b[31mfoo\x1b[0m'
 );
 
 assert.strictEqual(
@@ -544,17 +544,17 @@ assert.strictEqual(
     '%cfoo',
     'color: red; background-color: blue'
   ),
-  '\x1B[44m' + '\x1B[31m' + 'foo' + '\x1B[0m'
+  '\x1B[44m\x1B[31mfoo\x1B[0m'
 );
 
 assert.strictEqual(
   util.formatWithOptions({ colors: true }, '%cfoo', 'color: red', 'bar'),
-  '\x1b[31m' + 'foo' + '\x1b[0m' + ' bar'
+  '\x1b[31mfoo\x1b[0m bar'
 );
 
 assert.strictEqual(
   util.formatWithOptions({ colors: true }, '%cfoo%c bar', 'color: red', ''),
-  '\x1b[31m' + 'foo' + '\x1b[39m' + ' bar' + '\x1b[0m'
+  '\x1b[31mfoo\x1b[39m bar\x1b[0m'
 );
 
 assert.strictEqual(
@@ -564,5 +564,5 @@ assert.strictEqual(
     'color: red',
     'color: blue'
   ),
-  '\x1b[31m' + 'foo ' + '\x1b[34m' + 'bar' + '\x1b[0m'
+  '\x1b[31mfoo \x1b[34mbar\x1b[0m'
 );