diff --git a/exercises/B-hello-world/README.md b/exercises/B-hello-world/README.md
index 8c704fb43..27282c4af 100644
--- a/exercises/B-hello-world/README.md
+++ b/exercises/B-hello-world/README.md
@@ -7,7 +7,7 @@ Inside of `exercise.js` there's a line of code that will print "Hello world!".
 ### 1. Run the program
 
 - Open a terminal window
-- Change directory to this folder (`cd B-hello-world`)
+- Change directory to this folder (`cd exercises/B-hello-world`) - assuming you're at the project root
 - Run the program using node (`node exercise.js`)
 
 ### 2. Experiment
diff --git a/extra/1-currency-conversion.js b/extra/1-currency-conversion.js
index d82e59480..75b3c6aab 100644
--- a/extra/1-currency-conversion.js
+++ b/extra/1-currency-conversion.js
@@ -20,7 +20,7 @@ function convertToBRL() {}
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.
 
-To run these tests type `npm run extraTo run the tests for just this one file, type `npm run extra-tests -- --testPathPattern 1-syntax-errors` into your terminal
+To run the tests for just this one file, type `npm test -- --testPathPattern 1-currency-conversion` into your terminal
 (Reminder: You must have run `npm install` one time before this will work!)
 */
 
diff --git a/extra/2-piping.js b/extra/2-piping.js
index 9c8ebc76a..b4f8c4c1b 100644
--- a/extra/2-piping.js
+++ b/extra/2-piping.js
@@ -40,7 +40,7 @@ let goodCode =
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.
 
-To run these tests type `npm run extraTo run the tests for just this one file, type `npm run extra-tests -- --testPathPattern 2-piping` into your terminal
+To run the tests for just this one file, type `npm test -- --testPathPattern 2-piping` into your terminal
 (Reminder: You must have run `npm install` one time before this will work!)
 */
 
diff --git a/extra/3-magic-8-ball.js b/extra/3-magic-8-ball.js
index f3adbefa5..46f65f928 100644
--- a/extra/3-magic-8-ball.js
+++ b/extra/3-magic-8-ball.js
@@ -68,7 +68,7 @@ function checkAnswer(answer) {
 
 There are some Tests in this file that will help you work out if your code is working.
 
-To run these tests type `npm run extraTo run the tests for just this one file, type `npm run extra-tests -- --testPathPattern 3-magic-8-ball` into your terminal
+To run the tests for just this one file, type `npm test -- --testPathPattern 3-magic-8-ball` into your terminal
 (Reminder: You must have run `npm install` one time before this will work!)
 ==================================
 */