diff --git a/README.rst b/README.rst
index 558cc8e8..101d452a 100644
--- a/README.rst
+++ b/README.rst
@@ -36,6 +36,10 @@ The package is released under the new BSD license.
 Changelog
 ---------
 
+0.2.5
+~~~~~
+* Fix silly bug with reference transactions
+
 0.2.4
 ~~~~~
 * Fix bug with installing templates
diff --git a/paypal/__init__.py b/paypal/__init__.py
index d0c61da8..bcddf3af 100644
--- a/paypal/__init__.py
+++ b/paypal/__init__.py
@@ -1 +1 @@
-VERSION = '0.2.4'
+VERSION = '0.2.5'
diff --git a/paypal/payflow/facade.py b/paypal/payflow/facade.py
index effc2903..a7f1b2be 100644
--- a/paypal/payflow/facade.py
+++ b/paypal/payflow/facade.py
@@ -131,15 +131,15 @@ def referenced_sale(order_number, pnref, amt):
        payment details.
 
     2. It allows an initial authorisation to be settled in multiple parts.  The
-       first settle should use delayed_capture but any subsequent ones should use this method.
+       first settle should use delayed_capture but any subsequent ones should
+       use this method.
 
     :order_number: Order number.
     :pnref: PNREF of a previous transaction to use.
     :amt: The amount to settle for.
     """
-    txn = gateway.reference_transaction(order_number,
-                                        pnref,
-                                        amt)
+    txn = gateway.reference_transaction(
+        order_number, pnref, amt)
     if not txn.is_approved:
         raise exceptions.UnableToTakePayment(txn.respmsg)
     return txn
diff --git a/paypal/payflow/gateway.py b/paypal/payflow/gateway.py
index d7555dfe..e470961a 100644
--- a/paypal/payflow/gateway.py
+++ b/paypal/payflow/gateway.py
@@ -89,7 +89,8 @@ def reference_transaction(order_number, pnref, amt):
     """
     params = {
         'COMMENT1': order_number,
-        # Use SALE as we are effectively authorisating and settling a new transaction
+        # Use SALE as we are effectively authorising and settling a new
+        # transaction
         'TRXTYPE': codes.SALE,
         'ORIGID': pnref,
         'AMT': amt,
@@ -136,7 +137,7 @@ def _transaction(extra_params):
     # Validate constraints on parameters
     constraints = {
         codes.AUTHORIZATION: ('ACCT', 'AMT', 'EXPDATE'),
-        codes.SALE: ('ACCT', 'AMT', 'EXPDATE'),
+        codes.SALE: ('AMT',),
         codes.DELAYED_CAPTURE: ('ORIGID',),
         codes.CREDIT: ('ORIGID',),
         codes.VOID: ('ORIGID',),
@@ -170,7 +171,8 @@ def _transaction(extra_params):
     # Ensure that any amounts have a currency and are formatted correctly
     if 'AMT' in params:
         if 'CURRENCY' not in params:
-            params['CURRENCY'] = getattr(settings, 'PAYPAL_PAYFLOW_CURRENCY', 'USD')
+            params['CURRENCY'] = getattr(settings,
+                                         'PAYPAL_PAYFLOW_CURRENCY', 'USD')
         params['AMT'] = "%.2f" % params['AMT']
 
     if getattr(settings, 'PAYPAL_PAYFLOW_PRODUCTION_MODE', False):
@@ -183,6 +185,7 @@ def _transaction(extra_params):
     pairs = gateway.post(url, params)
 
     # Beware - this log information will contain the Payflow credentials
+    # only use it in development, not production.
     logger.debug("Raw request: %s", pairs['_raw_request'])
     logger.debug("Raw response: %s", pairs['_raw_response'])
 
diff --git a/requirements.txt b/requirements.txt
index 8f60c079..f37eec81 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ django-nose==1.0
 nose==1.1.2
 django-extensions==0.8
 django-debug-toolbar==0.9.4
+pinocchio==0.3.1
diff --git a/runtests.py b/runtests.py
index f6d0be32..bc06c53c 100755
--- a/runtests.py
+++ b/runtests.py
@@ -64,15 +64,15 @@
             ),
             DEBUG=False,
             SOUTH_TESTS_MIGRATE=False,
-            HAYSTACK_CONNECTIONS = {
+            HAYSTACK_CONNECTIONS={
                 'default': {
                     'ENGINE': 'haystack.backends.simple_backend.SimpleEngine',
                 },
             },
-            TEMPLATE_DIRS = (OSCAR_MAIN_TEMPLATE_DIR,),
+            TEMPLATE_DIRS=(OSCAR_MAIN_TEMPLATE_DIR,),
             SITE_ID=1,
             ROOT_URLCONF='tests.urls',
-            NOSE_ARGS=['-s'],
+            NOSE_ARGS=['-s', '--with-spec'],
             **extra_settings
         )
 
@@ -88,7 +88,7 @@ def run_tests(*test_args):
         test_args = ['tests']
 
     # Run tests
-    test_runner = NoseTestSuiteRunner(verbosity=2)
+    test_runner = NoseTestSuiteRunner(verbosity=1)
 
     c = coverage(source=['paypal'], omit=['*migrations*', '*tests*'])
     c.start()
@@ -100,6 +100,7 @@ def run_tests(*test_args):
     print "Generating HTML coverage report"
     c.html_report()
 
+
 def generate_migration():
     from south.management.commands.schemamigration import Command
     com = Command()
diff --git a/tests/unit/payflow/gateway_tests.py b/tests/unit/payflow/gateway_tests.py
index f75281ba..472436ab 100644
--- a/tests/unit/payflow/gateway_tests.py
+++ b/tests/unit/payflow/gateway_tests.py
@@ -65,3 +65,19 @@ def test_error_handled_gracefully(self):
                 cvv='123',
                 expiry_date='0113',
                 amt=D('10.8000'))
+
+
+class TestReferenceTransaction(TestCase):
+
+    def test_for_smoke(self):
+        with mock.patch('paypal.gateway.post') as mock_post:
+            mock_post.return_value = {
+                'RESULT': '1',
+                'RESPMSG': '',
+                '_raw_request': '',
+                '_raw_response': '',
+                '_response_time': 1000
+            }
+            gateway.reference_transaction(order_number='12345',
+                                          pnref='111222',
+                                          amt=D('12.23'))