diff --git a/attract_server/subversion.py b/attract_server/subversion.py
index a8c4cc3..f94f0ae 100644
--- a/attract_server/subversion.py
+++ b/attract_server/subversion.py
@@ -12,7 +12,6 @@ from . import attrs_extra
 
 task_logged = blinker.NamedSignal('task_logged')
 task_marker_re = re.compile(r'\[(?P<task_id>T\d+)\]')
-FETCH_AND_OBSERVE_CHUNK_SIZE = 10
 
 
 def obtain(server_location):
@@ -33,8 +32,7 @@ class CommitLogObserver(object):
         self._log.debug('%s: fetch_and_observe()', self)
 
         svn_log = self.svn_client.log_default(
-            revision_from=self.last_seen_revision + 1,
-            revision_to=self.last_seen_revision + FETCH_AND_OBSERVE_CHUNK_SIZE)
+            revision_from=self.last_seen_revision + 1)
 
         for log_entry in svn_log:
             self._log.debug('- %r', log_entry)
diff --git a/tests/test_subversion.py b/tests/test_subversion.py
index 108c6ed..bf04a84 100644
--- a/tests/test_subversion.py
+++ b/tests/test_subversion.py
@@ -78,9 +78,7 @@ class TestCommitLogObserver(unittest.TestCase):
         self.mock_client.log_default = mock.Mock(name='log_default', return_value=[])
         self.observer.fetch_and_observe()
 
-        self.mock_client.log_default.assert_called_once_with(
-            revision_from=1,
-            revision_to=subversion.FETCH_AND_OBSERVE_CHUNK_SIZE)
+        self.mock_client.log_default.assert_called_once_with(revision_from=1)
 
         # Should not have changed from the default.
         self.assertEqual(self.observer.last_seen_revision, 0)
@@ -97,14 +95,10 @@ class TestCommitLogObserver(unittest.TestCase):
         self.observer.last_seen_revision = 42
 
         self.observer.fetch_and_observe()
-        self.mock_client.log_default.assert_called_with(
-            revision_from=43,
-            revision_to=42 + subversion.FETCH_AND_OBSERVE_CHUNK_SIZE)
+        self.mock_client.log_default.assert_called_with(revision_from=43)
 
         self.observer.fetch_and_observe()
-        self.mock_client.log_default.assert_called_with(
-            revision_from=47,
-            revision_to=46 + subversion.FETCH_AND_OBSERVE_CHUNK_SIZE)
+        self.mock_client.log_default.assert_called_with(revision_from=47)
 
         self.assertEqual(self.observer.last_seen_revision, 51)