--- a/taskcluster/ci/desktop-test/test-sets.yml
+++ b/taskcluster/ci/desktop-test/test-sets.yml
@@ -28,16 +28,17 @@ all-tests:
     - mochitest-gpu
     - mochitest-jetpack
     - mochitest-media
     - mochitest-webgl
     - reftest
     - reftest-no-accel
     - web-platform-tests
     - web-platform-tests-reftests
+    - web-platform-tests-wdspec
     - xpcshell
 
 asan-tests:
     - cppunit
     - crashtest
     - firefox-ui-functional-local
     - firefox-ui-functional-remote
     - gtest

--- a/taskcluster/ci/desktop-test/tests.yml
+++ b/taskcluster/ci/desktop-test/tests.yml
@@ -445,16 +445,33 @@ web-platform-tests-reftests:
         script: web_platform_tests.py
         no-read-buildbot-config: true
         config:
             - web_platform_tests/prod_config.py
             - remove_executables.py
         extra-options:
             - --test-type=reftest
 
+web-platform-tests-wdspec:
+    description: "Web platform webdriver-spec run"
+    suite: web-platform-tests-wdspec
+    treeherder-symbol: tc-W(Wd)
+    max-run-time: 5400
+    instance-size: xlarge
+    docker-image: {"in-tree": "desktop1604-test"}
+    checkout: true
+    mozharness:
+        script: web_platform_tests.py
+        no-read-buildbot-config: true
+        config:
+            - web_platform_tests/prod_config.py
+            - remove_executables.py
+        extra-options:
+            - --test-type=wdspec
+
 xpcshell:
     description: "xpcshell test run"
     suite: xpcshell
     treeherder-symbol: tc-X()
     chunks:
         by-test-platform:
             linux64/debug: 10
             default: 8