diff --git a/lib/timers.js b/lib/timers.js
index 56af3a92d6bfe2..a55e265f29ffe9 100644
--- a/lib/timers.js
+++ b/lib/timers.js
@@ -473,8 +473,8 @@ function unrefdHandle() {
 
   // Make sure we clean up if the callback is no longer a function
   // even if the timer is an interval.
-  if (!this.owner._repeat
-      || typeof this.owner._onTimeout !== 'function') {
+  if (!this.owner._repeat ||
+      typeof this.owner._onTimeout !== 'function') {
     this.owner.close();
   }
 }
diff --git a/test/parallel/test-preload.js b/test/parallel/test-preload.js
index f849bc3dda3243..4ee564f0520cc5 100644
--- a/test/parallel/test-preload.js
+++ b/test/parallel/test-preload.js
@@ -32,27 +32,27 @@ const fixtureD = fixture('define-global.js');
 const fixtureThrows = fixture('throws_error4.js');
 
 // test preloading a single module works
-childProcess.exec(nodeBinary + ' '
-  + preloadOption([fixtureA]) + ' '
-  + fixtureB,
+childProcess.exec(nodeBinary + ' ' +
+  preloadOption([fixtureA]) + ' ' +
+  fixtureB,
   function(err, stdout, stderr) {
     if (err) throw err;
     assert.strictEqual(stdout, 'A\nB\n');
   });
 
 // test preloading multiple modules works
-childProcess.exec(nodeBinary + ' '
-  + preloadOption([fixtureA, fixtureB]) + ' '
-  + fixtureC,
+childProcess.exec(nodeBinary + ' ' +
+  preloadOption([fixtureA, fixtureB]) + ' ' +
+  fixtureC,
   function(err, stdout, stderr) {
     if (err) throw err;
     assert.strictEqual(stdout, 'A\nB\nC\n');
   });
 
 // test that preloading a throwing module aborts
-childProcess.exec(nodeBinary + ' '
-  + preloadOption([fixtureA, fixtureThrows]) + ' '
-  + fixtureB,
+childProcess.exec(nodeBinary + ' ' +
+  preloadOption([fixtureA, fixtureThrows]) + ' ' +
+  fixtureB,
   function(err, stdout, stderr) {
     if (err) {
       assert.strictEqual(stdout, 'A\n');
@@ -62,9 +62,9 @@ childProcess.exec(nodeBinary + ' '
   });
 
 // test that preload can be used with --eval
-childProcess.exec(nodeBinary + ' '
-  + preloadOption([fixtureA])
-  + '-e "console.log(\'hello\');"',
+childProcess.exec(nodeBinary + ' ' +
+  preloadOption([fixtureA]) +
+  '-e "console.log(\'hello\');"',
   function(err, stdout, stderr) {
     if (err) throw err;
     assert.strictEqual(stdout, 'A\nhello\n');
@@ -108,19 +108,19 @@ replProc.on('close', function(code) {
 
 // test that preload placement at other points in the cmdline
 // also test that duplicated preload only gets loaded once
-childProcess.exec(nodeBinary + ' '
-  + preloadOption([fixtureA])
-  + '-e "console.log(\'hello\');" '
-  + preloadOption([fixtureA, fixtureB]),
+childProcess.exec(nodeBinary + ' ' +
+  preloadOption([fixtureA]) +
+  '-e "console.log(\'hello\');" ' +
+  preloadOption([fixtureA, fixtureB]),
   function(err, stdout, stderr) {
     if (err) throw err;
     assert.strictEqual(stdout, 'A\nB\nhello\n');
   });
 
 // test that preload works with -i
-const interactive = childProcess.exec(nodeBinary + ' '
-  + preloadOption([fixtureD])
-  + '-i',
+const interactive = childProcess.exec(nodeBinary + ' ' +
+  preloadOption([fixtureD]) +
+  '-i',
   common.mustCall(function(err, stdout, stderr) {
     assert.ifError(err);
     assert.strictEqual(stdout, "> 'test'\n> ");
@@ -129,9 +129,9 @@ const interactive = childProcess.exec(nodeBinary + ' '
 interactive.stdin.write('a\n');
 interactive.stdin.write('process.exit()\n');
 
-childProcess.exec(nodeBinary + ' '
-  + '--require ' + fixture('cluster-preload.js') + ' '
-  + fixture('cluster-preload-test.js'),
+childProcess.exec(nodeBinary + ' ' +
+  '--require ' + fixture('cluster-preload.js') + ' ' +
+  fixture('cluster-preload-test.js'),
   function(err, stdout, stderr) {
     if (err) throw err;
     assert.ok(/worker terminated with code 43/.test(stdout));
@@ -139,10 +139,10 @@ childProcess.exec(nodeBinary + ' '
 
 // https://github.com/nodejs/node/issues/1691
 process.chdir(common.fixturesDir);
-childProcess.exec(nodeBinary + ' '
-  + '--expose_debug_as=v8debug '
-  + '--require ' + fixture('cluster-preload.js') + ' '
-  + 'cluster-preload-test.js',
+childProcess.exec(nodeBinary + ' ' +
+  '--expose_debug_as=v8debug ' +
+  '--require ' + fixture('cluster-preload.js') + ' ' +
+  'cluster-preload-test.js',
   function(err, stdout, stderr) {
     if (err) throw err;
     assert.ok(/worker terminated with code 43/.test(stdout));
diff --git a/test/parallel/test-repl-domain.js b/test/parallel/test-repl-domain.js
index 9f66f306395d29..3cc88b75f72428 100644
--- a/test/parallel/test-repl-domain.js
+++ b/test/parallel/test-repl-domain.js
@@ -18,6 +18,6 @@ putIn.write = function(data) {
 };
 
 putIn.run([
-  'require("domain").create().on("error", function() { console.log("OK") })'
-  + '.run(function() { throw new Error("threw") })'
+  'require("domain").create().on("error", function() { console.log("OK") })' +
+  '.run(function() { throw new Error("threw") })'
 ]);
diff --git a/test/parallel/test-tls-client-mindhsize.js b/test/parallel/test-tls-client-mindhsize.js
index 9956c971ffbbf3..1d812a72093ba9 100644
--- a/test/parallel/test-tls-client-mindhsize.js
+++ b/test/parallel/test-tls-client-mindhsize.js
@@ -53,8 +53,8 @@ function test(size, err, next) {
     if (err) {
       client.on('error', function(e) {
         nerror++;
-        assert.strictEqual(e.message, 'DH parameter size 1024 is less'
-                           + ' than 2048');
+        assert.strictEqual(e.message, 'DH parameter size 1024 is less' +
+                           ' than 2048');
         server.close();
       });
     }