--- a/taskcluster/ci/legacy/tasks/tests/fx_linux64_marionette_e10s.yml
+++ b/taskcluster/ci/legacy/tasks/tests/fx_linux64_marionette_e10s.yml
@@ -18,9 +18,10 @@ task:
     name: '[TC] Linux64 marionette-e10s'
     description: Marionette e10s unittest run
   extra:
     suite:
       name: marionette
       flavor: marionette
     treeherder:
       groupName: Desktop marionette e10s
-      symbol: Mn-e10s
+      groupSymbol: tc-e10s
+      symbol: Mn

--- a/taskcluster/ci/legacy/tasks/tests/fx_linux64_web_platform_tests_e10s.yml
+++ b/taskcluster/ci/legacy/tasks/tests/fx_linux64_web_platform_tests_e10s.yml
@@ -19,15 +19,15 @@ task:
           mozharness/configs/web_platform_tests/prod_config.py
           mozharness/configs/remove_executables.py
   metadata:
     name: '[TC] Linux64 web-platform-tests-e10s-{{chunk}}'
     description: Web platform e10s tests run {{chunk}}
   extra:
     suite:
       name: web-platform-tests
-      flavor: web-platform-tests-e10s
+      flavor: web-platform-tests
     chunks:
       total: 12
     treeherder:
       groupName: Desktop web-platform-tests
       groupSymbol: tc-W-e10s
       symbol: {{chunk}}