diff --git a/test/async-hooks/test-signalwrap.js b/test/async-hooks/test-signalwrap.js
index c2e664af9a567e..ff7d08bc1207b0 100644
--- a/test/async-hooks/test-signalwrap.js
+++ b/test/async-hooks/test-signalwrap.js
@@ -22,7 +22,7 @@ assert.strictEqual(typeof signal1.triggerAsyncId, 'number');
 checkInvocations(signal1, { init: 1 }, 'when SIGUSR2 handler is set up');
 
 let count = 0;
-exec('kill -USR2 ' + process.pid);
+exec(`kill -USR2 ${process.pid}`);
 
 let signal2;
 
@@ -36,7 +36,7 @@ function onsigusr2() {
       ' signal1: when first SIGUSR2 handler is called for the first time');
 
     // trigger same signal handler again
-    exec('kill -USR2 ' + process.pid);
+    exec(`kill -USR2 ${process.pid}`);
   } else {
     // second invocation
     checkInvocations(
@@ -61,7 +61,7 @@ function onsigusr2() {
       signal2, { init: 1 },
       'signal2: when second SIGUSR2 handler is setup');
 
-    exec('kill -USR2 ' + process.pid);
+    exec(`kill -USR2 ${process.pid}`);
   }
 }