diff --git a/tools_webrtc/gtest-parallel-wrapper.py b/tools_webrtc/gtest-parallel-wrapper.py
index de845b0..b39bda6 100755
--- a/tools_webrtc/gtest-parallel-wrapper.py
+++ b/tools_webrtc/gtest-parallel-wrapper.py
@@ -31,7 +31,7 @@
       --another_flag \
       -- \
       --isolated-script-test-output=some_dir \
-      --isolated-script-test-chartjson-output=some_other_dir \
+      --isolated-script-test-perf-output=some_other_dir \
       --foo=bar \
       --baz
 
@@ -78,7 +78,7 @@
   # We don't need to implement this flag, and possibly can't, since it's
   # intended for results of Telemetry tests. See
   # https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/HEAD/dashboard/docs/data-format.md
-  parser.add_argument('--isolated-script-test-chartjson-output', type=str,
+  parser.add_argument('--isolated-script-test-perf-output', type=str,
                       default=None)
 
   # No-sandbox is a Chromium-specific flag, ignore it.
diff --git a/tools_webrtc/valgrind/webrtc_tests.py b/tools_webrtc/valgrind/webrtc_tests.py
index dcd88e8..7feb830 100755
--- a/tools_webrtc/valgrind/webrtc_tests.py
+++ b/tools_webrtc/valgrind/webrtc_tests.py
@@ -130,7 +130,7 @@
   # TODO(oprypin): Remove (bugs.webrtc.org/8115)
   ignore_parser.add_argument('--isolated-script-test-output',
                              type=str, default=None)
-  ignore_parser.add_argument('--isolated-script-test-chartjson-output',
+  ignore_parser.add_argument('--isolated-script-test-perf-output',
                              type=str, default=None)
   _, args = ignore_parser.parse_known_args(args)