diff --git a/README.md b/README.md
index 30c20aa..8ef3ba5 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,14 @@ npm run-script build
 npm test
 ```
 
+### Testing (karma)
+Karma allows testing within one or several browser.
+
+```bash
+karma start --singleRun=true --browsers="Chrome,Firefox"
+```
+
+
 **Please note this repo is in it's early stage.**
 
 If you'd like to run a Http ethereum node check out
diff --git a/karma.conf.js b/karma.conf.js
index aa26fd2..0ed5a15 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -78,7 +78,7 @@ module.exports = function (config) {
         browserDisconnectTimeout: 5000,
 
         customLaunchers: {
-            chrome_without_security: {
+            chromeWithoutSecurity: {
                 base: 'Chrome',
                 flags: ['--disable-web-security']
             },