1 files changed, 1 insertions, 1 deletions
diff --git a/lib/assert.js b/lib/assert.js
index 94e9406393..e32cae3cff 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -284,7 +284,7 @@ function getErrMessage(message, fn) {
     // Flush unfinished multi byte characters.
     decoder.end();
     // Always normalize indentation, otherwise the message could look weird.
-    if (message.indexOf('\n') !== -1) {
+    if (message.includes('\n')) {
       if (EOL === '\r\n') {
         message = message.replace(/\r\n/g, '\n');
       }