--- a/taskcluster/ci/test/test-platforms.yml
+++ b/taskcluster/ci/test/test-platforms.yml
@@ -78,16 +78,17 @@ linux64-pgo/opt:
         - web-platform-tests
         - talos
         - raptor
 
 linux64-asan/opt:
     build-platform: linux64-asan/opt
     test-sets:
         - common-tests
+        - web-platform-tests
 
 # Stylo sequential runs check memory and performance when using a single thread.
 linux64-stylo-sequential/opt:
     build-platform: linux64/opt
     test-sets:
         - awsy-stylo-sequential
 
 # QR builds just run a subset right now.

--- a/taskcluster/ci/test/web-platform.yml
+++ b/taskcluster/ci/test/web-platform.yml
@@ -33,16 +33,17 @@ web-platform-tests:
             linux32/debug: both
             default: true
     run-on-projects:
         by-test-platform:
             linux64-qr/.*: ['release', 'try']  # skip on integration branches due to high load
             default: built-projects
     tier:
         by-test-platform:
+            linux64-asan/opt: 2
             linux64-qr/.*: 2  # can't be tier-1 if it's not running on integration branches
             default: default
     mozharness:
         chunked: true
         extra-options:
             - --test-type=testharness
 
 web-platform-tests-headless:
@@ -87,16 +88,17 @@ web-platform-tests-reftests:
             linux32/debug: both
             default: true
     run-on-projects:
         by-test-platform:
             linux64-qr/.*: ['release', 'try']  # skip on integration branches due to high load
             default: built-projects
     tier:
         by-test-platform:
+            linux64-asan/opt: 2
             linux64-qr/.*: 2  # can't be tier-1 if it's not running on integration branches
             default: default
     mozharness:
         extra-options:
             - --test-type=reftest
 
 web-platform-tests-reftests-headless:
     description: "Web platform reftest headless run"
@@ -131,16 +133,17 @@ web-platform-tests-wdspec:
         extra-options:
             - --test-type=wdspec
     run-on-projects:
         by-test-platform:
             linux64-qr/.*: ['release', 'try']  # skip on integration branches due to high load
             default: built-projects
     tier:
         by-test-platform:
+            linux64-asan/opt: 2
             linux64-qr/.*: 2  # can't be tier-1 if it's not running on integration branches
             default: default
 
 web-platform-tests-wdspec-headless:
     description: "Web platform webdriver-spec headless run"
     suite: web-platform-tests-wdspec
     treeherder-symbol: W(WdH)
     run-on-projects: []  # disabled pending releng approval