--- a/taskcluster/ci/legacy/tasks/builds/dbg_linux64_asan.yml
+++ b/taskcluster/ci/legacy/tasks/builds/dbg_linux64_asan.yml
@@ -7,17 +7,17 @@ task:
   metadata:
       name: '[TC] Linux64 ASan Debug'
       description: 'Linux64 ASan Debug'
 
   routes:
     - 'index.buildbot.branches.{{project}}.linux64-asan'
     - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-asan'
 
-  workerType: dbg-linux64
+  workerType: gecko-{{level}}-b-linux
 
   payload:
     env:
       MH_CUSTOM_BUILD_VARIANT_CFG: 'asan-tc-and-debug'
 
   extra:
     treeherder:
       groupSymbol: tc

--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64_asan.yml
+++ b/taskcluster/ci/legacy/tasks/builds/opt_linux64_asan.yml
@@ -7,17 +7,17 @@ task:
   metadata:
       name: '[TC] Linux64 ASan Opt'
       description: 'Linux64 ASan Opt'
 
   routes:
     - 'index.buildbot.branches.{{project}}.linux64-asan'
     - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-asan'
 
-  workerType: opt-linux64
+  workerType: gecko-{{level}}-b-linux
 
   payload:
     env:
       MH_CUSTOM_BUILD_VARIANT_CFG: 'asan-tc'
 
   extra:
     treeherder:
       groupSymbol: tc