diff --git a/tools/valgrind-webrtc/webrtc_tests.py b/tools/valgrind-webrtc/webrtc_tests.py
index b8b398bd04..cc0165ea40 100755
--- a/tools/valgrind-webrtc/webrtc_tests.py
+++ b/tools/valgrind-webrtc/webrtc_tests.py
@@ -100,6 +100,9 @@ def main(_):
                     help='Argument for --gtest_repeat')
   parser.add_option("--gtest_shuffle", action="store_true", default=False,
                     help="Randomize tests' orders on every iteration.")
+  parser.add_option('', '--gtest_output',
+                    help=('Argument for --gtest_output (ignored but included '
+                          'for compatibility).'))
   parser.add_option('-v', '--verbose', action='store_true', default=False,
                     help='Verbose output - enable debug log messages')
   parser.add_option('', '--tool', dest='valgrind_tool', default='memcheck',