diff --git a/lbrynet/core/server/BlobRequestHandler.py b/lbrynet/core/server/BlobRequestHandler.py
index 2ce3688b4..36f67d797 100644
--- a/lbrynet/core/server/BlobRequestHandler.py
+++ b/lbrynet/core/server/BlobRequestHandler.py
@@ -140,6 +140,7 @@ class BlobRequestHandler(object):
         def set_expected_payment():
             log.info("Setting expected payment")
             if self.blob_bytes_uploaded != 0 and self.blob_data_payment_rate is not None:
+                # TODO: explain why 2**20
                 self.wallet.add_expected_payment(self.peer,
                                                  self.currently_uploading.length * 1.0 *
                                                  self.blob_data_payment_rate / 2**20)
@@ -156,4 +157,4 @@ class BlobRequestHandler(object):
             if reason is not None and isinstance(reason, Failure):
                 log.info("Upload has failed. Reason: %s", reason.getErrorMessage())
 
-        return _send_file()
\ No newline at end of file
+        return _send_file()
diff --git a/tests/lbrynet/core/server/test_BlobRequestHandler.py b/tests/lbrynet/core/server/test_BlobRequestHandler.py
index 4cd04259a..5c55af574 100644
--- a/tests/lbrynet/core/server/test_BlobRequestHandler.py
+++ b/tests/lbrynet/core/server/test_BlobRequestHandler.py
@@ -1,7 +1,11 @@
+import StringIO
+
 import mock
-from twisted.internet import defer
+from twisted.internet import defer, protocol
+from twisted.test import proto_helpers
 from twisted.trial import unittest
 
+from lbrynet.core import Peer
 from lbrynet.core.server import BlobRequestHandler
 
 
@@ -13,8 +17,9 @@ class TestBlobRequestHandlerQueries(unittest.TestCase):
             self.blob_manager, None, self.payment_rate_manager)
 
     def test_empty_response_when_empty_query(self):
-        self.assertEqual({}, self.successResultOf(self.handler.handle_queries({})))
-        
+        self.assertEqual(
+            {}, self.successResultOf(self.handler.handle_queries({})))
+
     def test_error_set_when_rate_is_missing(self):
         query = {'requested_blob': 'blob'}
         deferred = self.handler.handle_queries(query)
@@ -99,6 +104,24 @@ class TestBlobRequestHandlerQueries(unittest.TestCase):
             }
         }
         self.assertEqual(response, self.successResultOf(deferred))
-        
 
-        
+
+class TestBlobRequestHandlerSender(unittest.TestCase):
+    def test_nothing_happens_if_not_currently_uploading(self):
+        handler = BlobRequestHandler.BlobRequestHandler(None, None, None)
+        handler.currently_uploading = None
+        deferred = handler.send_blob_if_requested(None)
+        self.assertEqual(True, self.successResultOf(deferred))
+
+    def test_file_is_sent_to_consumer(self):
+        # TODO: also check that the expected payment values are set
+        consumer = proto_helpers.StringTransport()
+        test_file = StringIO.StringIO('test')
+        handler = BlobRequestHandler.BlobRequestHandler(None, None, None)
+        handler.peer = mock.create_autospec(Peer.Peer)
+        handler.currently_uploading = mock.Mock()
+        handler.read_handle = test_file
+        handler.send_blob_if_requested(consumer)
+        while consumer.producer:
+            consumer.producer.resumeProducing()
+        self.assertEqual(consumer.value(), 'test')