diff --git a/‎README.md‎
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diff --git a/‎test/spec/test.js‎
Lines changed: 2 additions & 2 deletions b/‎test/spec/test.js‎
Lines changed: 2 additions & 2 deletions
@@ -75,6 +75,7 @@ All of PayPal's [HTML button variables](https://cms.paypal.com/us/cgi-bin/?cmd=_
 * `data-size` For button images: `small` and `large` work. For QR codes enter the pixel length of the longest side.
 * `data-locale` The desired locale of the PayPal site.
 * `data-callback` The IPN notify URL to be called on completion of the transaction.
+* `data-env` The PayPal environment to checkout in, e.g. `sandbox` (defaults to 'www')
 
 
 ## Editable fields
 
@@ -92,11 +92,11 @@ describe('Environments', function () {
 	});
 
 	it('Should be a sandbox button', function () {
-		sandbox.action.should.contain('//sandbox.');
+		sandbox.action.should.include('//sandbox.');
 	});
 
 	it('Should be a www button', function () {
-		www.action.should.contain('//www.');
+		www.action.should.include('//www.');
 	});
 
 });