diff --git a/testtools/testresult/real.py b/testtools/testresult/real.py
index 7380e17..e9fb540 100644
--- a/testtools/testresult/real.py
+++ b/testtools/testresult/real.py
@@ -634,7 +634,7 @@ class StreamTagger(CopyStreamResult):
         super(StreamTagger, self).status(*args, **kwargs)
 
 
-class TestRecord(PClass):
+class _TestRecord(PClass):
     """Representation of a test."""
 
     """The test id."""
@@ -679,8 +679,8 @@ class TestRecord(PClass):
         * tags: The tags for the test. A set of unicode strings.
         * details: A dict of file attachments - ``testtools.content.Content``
           objects.
-        * status: One of the StreamResult status codes (including inprogress) or
-          'unknown' (used if only file events for a test were received...)
+        * status: One of the StreamResult status codes (including inprogress)
+          or 'unknown' (used if only file events for a test were received...)
         * timestamps: A pair of timestamps - the first one received with this
           test id, and the one in the event that triggered the notification.
           Hung tests have a None for the second end event. Timestamps are not
@@ -771,36 +771,36 @@ _status_map = pmap({
 })
 
 
-class StreamToTestRecord(StreamResult):
+class _StreamToTestRecord(StreamResult):
     """A specialised StreamResult that emits a callback as tests complete.
 
     Top level file attachments are simply discarded. Hung tests are detected
     by stopTestRun and notified there and then.
 
-    The callback is passed a ``TestRecord`` object.
+    The callback is passed a ``_TestRecord`` object.
 
     Only the most recent tags observed in the stream are reported.
     """
 
     def __init__(self, on_test):
-        """Create a StreamToTestRecord calling on_test on test completions.
+        """Create a _StreamToTestRecord calling on_test on test completions.
 
         :param on_test: A callback that accepts one parameter:
-            a ``TestRecord`` object describing a test.
+            a ``_TestRecord`` object describing a test.
         """
-        super(StreamToTestRecord, self).__init__()
+        super(_StreamToTestRecord, self).__init__()
         self.on_test = on_test
         if parse_mime_type is None:
             raise ImportError("mimeparse module missing.")
 
     def startTestRun(self):
-        super(StreamToTestRecord, self).startTestRun()
+        super(_StreamToTestRecord, self).startTestRun()
         self._inprogress = {}
 
     def status(self, test_id=None, test_status=None, test_tags=None,
                runnable=True, file_name=None, file_bytes=None, eof=False,
                mime_type=None, route_code=None, timestamp=None):
-        super(StreamToTestRecord, self).status(
+        super(_StreamToTestRecord, self).status(
             test_id, test_status,
             test_tags=test_tags, runnable=runnable, file_name=file_name,
             file_bytes=file_bytes, eof=eof, mime_type=mime_type,
@@ -836,7 +836,7 @@ class StreamToTestRecord(StreamResult):
         return case
 
     def stopTestRun(self):
-        super(StreamToTestRecord, self).stopTestRun()
+        super(_StreamToTestRecord, self).stopTestRun()
         while self._inprogress:
             case = self._inprogress.popitem()[1]
             self.on_test(case.got_timestamp(None))
@@ -846,7 +846,7 @@ class StreamToTestRecord(StreamResult):
             return
         key = (test_id, route_code)
         if key not in self._inprogress:
-            self._inprogress[key] = TestRecord.create(test_id, timestamp)
+            self._inprogress[key] = _TestRecord.create(test_id, timestamp)
         return key
 
 
@@ -879,16 +879,16 @@ class StreamToDict(StreamResult):
     # class, and have this inherit from that.
 
     def __init__(self, on_test):
-        """Create a StreamToTestRecord calling on_test on test completions.
+        """Create a _StreamToTestRecord calling on_test on test completions.
 
         :param on_test: A callback that accepts one parameter:
-            a ``TestRecord`` object describing a test.
+            a dictionary describing a test.
         """
         super(StreamToDict, self).__init__()
-        self._hook = StreamToTestRecord(self._handle_test)
+        self._hook = _StreamToTestRecord(self._handle_test)
         # XXX: Not clear whether its part of the supported interface for
         # self.on_test to be the passed-in on_test. If not, we could reduce
-        # the boilerplate by subclassing StreamToTestRecord.
+        # the boilerplate by subclassing _StreamToTestRecord.
         self.on_test = on_test
 
     def _handle_test(self, test_record):
@@ -913,7 +913,7 @@ def test_dict_to_case(test_dict):
     :param test_dict: A test dict as generated by StreamToDict.
     :return: A PlaceHolder test object.
     """
-    return TestRecord(
+    return _TestRecord(
         id=test_dict['id'],
         tags=test_dict['tags'],
         details=test_dict['details'],
@@ -932,7 +932,7 @@ class StreamSummary(StreamResult):
 
     def __init__(self):
         super(StreamSummary, self).__init__()
-        self._hook = StreamToTestRecord(self._gather_test)
+        self._hook = _StreamToTestRecord(self._gather_test)
         self._handle_status = {
             'success': self._success,
             'skip': self._skip,
@@ -1688,8 +1688,8 @@ class StreamToExtendedDecorator(StreamResult):
         # ExtendedToOriginalDecorator takes care of thunking details back to
         # exceptions/reasons etc.
         self.decorated = ExtendedToOriginalDecorator(decorated)
-        # StreamToTestRecord buffers and gives us individual tests.
-        self.hook = StreamToTestRecord(self._handle_tests)
+        # _StreamToTestRecord buffers and gives us individual tests.
+        self.hook = _StreamToTestRecord(self._handle_tests)
 
     def status(self, test_id=None, test_status=None, *args, **kwargs):
         if test_status == 'exists':