diff --git a/lib/appenders/multiFile.js b/lib/appenders/multiFile.js
index 2fd47b8..f981c3f 100644
--- a/lib/appenders/multiFile.js
+++ b/lib/appenders/multiFile.js
@@ -14,6 +14,7 @@ module.exports.configure = (config, layouts) => {
   function checkForTimeout(fileKey) {
     const timer = timers.get(fileKey);
     const app = files.get(fileKey);
+    /* istanbul ignore else */
     if (timer && app) {
       if (Date.now() - timer.lastUsed > timer.timeout) {
         debug('%s not used for > %d ms => close', fileKey, timer.timeout);