diff --git a/tools/lsan/suppressions.txt b/tools/lsan/suppressions.txt
index fa488d5ef6..319aed7052 100644
--- a/tools/lsan/suppressions.txt
+++ b/tools/lsan/suppressions.txt
@@ -31,6 +31,14 @@ leak:XRRFindDisplay
 
 #### Actual bugs in WebRTC code ####
 
+# rtc_unittest
+# https://code.google.com/p/webrtc/issues/detail?id=3827 for details.
+leak:rtc::unstarted_task_test_DoNotDeleteTask2_Test::TestBody
+leak:rtc::HttpServer::HandleConnection
+leak:rtc::HttpServer::Connection::onHttpHeaderComplete
+leak:rtc::HttpResponseData::set_success
+leak:rtc::HttpData::changeHeader
+
 # libjingle_media_unittest
 # https://code.google.com/p/webrtc/issues/detail?id=
 leak:cricket::FakeNetworkInterface::SetOption