diff --git a/Makefile b/Makefile
index 687294c..652ef0c 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,12 @@
 TAP := ./node_modules/.bin/tap
 
 
+#---- Files
+
+JSSTYLE_FILES := $(shell find lib test tools -name *.js)
+
+
+
 #---- Targets
 
 all:
@@ -23,3 +29,14 @@ cutarelease: versioncheck
 test: $(TAP)
 	TAP=1 $(TAP) test/*.test.js
 
+.PHONY: check-jsstyle
+check-jsstyle: $(JSSTYLE_FILES)
+	./tools/jsstyle -o indent=2,doxygen,unparenthesized-return=0,blank-after-start-comment=0 $(JSSTYLE_FILES)
+
+.PHONY: check
+check: check-jsstyle
+	@echo "Check ok."
+
+.PHONY: prepush
+prepush: check test
+	@echo "Okay to push."
diff --git a/test/ctor.test.js b/test/ctor.test.js
index 9abfe86..700158e 100644
--- a/test/ctor.test.js
+++ b/test/ctor.test.js
@@ -34,7 +34,7 @@ test('ensure Logger creation options', function (t) {
     {name: 'TypeError', message: 'invalid options.streams: must be an array'},
     '"streams" must be an array');
 
-  options = {name: 'foo', serializers: "a string"};
+  options = {name: 'foo', serializers: 'a string'};
   t.throws(function () { new Logger(options); },
     {name: 'TypeError', message: 'invalid options.serializers: must be an object'},
     '"serializers" cannot be a string');
@@ -87,5 +87,3 @@ test('ensure Logger child() options', function (t) {
 
   t.end();
 });
-
-
diff --git a/tools/timechild.js b/tools/timechild.js
index f5cf44f..8df5e0b 100755
--- a/tools/timechild.js
+++ b/tools/timechild.js
@@ -17,10 +17,10 @@ var ben = require('ben');  // npm install ben
 var Logger = require('../lib/bunyan');
 
 var log = new Logger({
-  name: "svc",
+  name: 'svc',
   streams: [
     {
-      path: __dirname + "/timechild.log"
+      path: __dirname + '/timechild.log'
     },
     {
       stream: process.stdout
@@ -31,7 +31,7 @@ var log = new Logger({
   }
 });
 
-console.log("Time `log.child`:");
+console.log('Time `log.child`:');
 
 var ms = ben(1e5, function () {
   var child = log.child();
@@ -62,12 +62,11 @@ console.log(' - adding serializer and one field: %dms per iteration', ms);
 var ms = ben(1e5, function () {
   var child = log.child({
     a: 1,
-    streams: [{
-      stream: process.stderr
-    }]
+    streams: [ {stream: process.stderr} ]
   });
 });
-console.log(' - adding a (stderr) stream and one field: %dms per iteration', ms);
+console.log(' - adding a (stderr) stream and one field: %dms per iteration',
+  ms);
 
 var ms = ben(1e6, function () {
   var child = log.child({}, true);
@@ -83,4 +82,3 @@ var ms = ben(1e6, function () {
   var child = log.child({a:1, b:2}, true);
 });
 console.log(' - [fast] adding two fields: %dms per iteration', ms);
-
diff --git a/tools/timeguard.js b/tools/timeguard.js
index 7af49a1..6d5b0f8 100755
--- a/tools/timeguard.js
+++ b/tools/timeguard.js
@@ -3,7 +3,7 @@
  * Time logging with/without a try/catch-guard on the JSON.stringify.
  */
 
-console.log("Time try/catch-guard on JSON.stringify:");
+console.log('Time try/catch-guard on JSON.stringify:');
 
 var ben = require('ben');  // npm install ben
 var Logger = require('../lib/bunyan');
@@ -11,19 +11,18 @@ var Logger = require('../lib/bunyan');
 var records = [];
 function Collector() {
 }
-Collector.prototype.write = function(s) {
+Collector.prototype.write = function (s) {
   //records.push(s);
 }
 var collector = new Collector();
 
 var log = new Logger({
-  name: "timeguard",
+  name: 'timeguard',
   src: true,
   stream: collector
 });
 
 var ms = ben(1e5, function () {
-  log.info("hi");
+  log.info('hi');
 });
 console.log(' - log.info:  %dms per iteration', ms);
-
diff --git a/tools/timesrc.js b/tools/timesrc.js
index b793037..456d5db 100755
--- a/tools/timesrc.js
+++ b/tools/timesrc.js
@@ -3,7 +3,7 @@
  * Time 'src' fields (getting log call source info). This is expensive.
  */
 
-console.log("Time adding 'src' field with call source info:");
+console.log('Time adding "src" field with call source info:');
 
 var ben = require('ben');  // npm install ben
 var Logger = require('../lib/bunyan');
@@ -11,27 +11,27 @@ var Logger = require('../lib/bunyan');
 var records = [];
 function Collector() {
 }
-Collector.prototype.write = function(s) {
+Collector.prototype.write = function (s) {
   //records.push(s);
 }
 var collector = new Collector();
 
 var logwith = new Logger({
-  name: "with-src",
+  name: 'with-src',
   src: true,
   stream: collector
 });
 
 var ms = ben(1e5, function () {
-  logwith.info("hi");
+  logwith.info('hi');
 });
 console.log(' - log.info with    src:  %dms per iteration', ms);
 
 var logwithout = new Logger({
-  name: "without-src",
+  name: 'without-src',
   stream: collector
 });
 var ms = ben(1e5, function () {
-  logwithout.info("hi");
+  logwithout.info('hi');
 });
 console.log(' - log.info without src:  %dms per iteration', ms);