--- a/taskcluster/ci/toolchain/linux.yml
+++ b/taskcluster/ci/toolchain/linux.yml
@@ -150,17 +150,17 @@ linux64-libdmg:
         toolchain-artifact: public/build/dmg.tar.xz
 
 linux64-sccache:
     description: "sccache toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TL(sccache)
-        tier: 2
+        tier: 1
     worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         docker-image: {in-tree: desktop-build}
         max-run-time: 36000
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/linux64/clang.manifest"
     run:
         using: toolchain-script

--- a/taskcluster/ci/toolchain/windows.yml
+++ b/taskcluster/ci/toolchain/windows.yml
@@ -97,17 +97,17 @@ win64-clang-tidy:
         - win64-sccache
 
 win64-sccache:
     description: "sccache toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TW64(sccache)
-        tier: 2
+        tier: 1
     worker-type: aws-provisioner-v1/gecko-{level}-b-win2012
     worker:
         max-run-time: 36000
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/sccache-build.manifest"
     run:
         using: toolchain-script
         script: build-sccache.sh