--- a/taskcluster/ci/test/tests.yml
+++ b/taskcluster/ci/test/tests.yml
@@ -1046,16 +1046,17 @@ reftest-no-accel:
                     - remove_executables.py
         extra-options:
             - --reftest-suite=reftest-no-accel
 
 reftest-stylo:
     description: "Reftest run for Stylo"
     suite: reftest/reftest-stylo
     treeherder-symbol: tc-R(Rs)
+    docker-image: {"in-tree": "desktop1604-test"}
     chunks: 16
     run-on-projects:
         by-test-platform:
             linux64-stylo/opt: [ 'stylo', 'autoland', 'mozilla-central', 'try' ]
             linux64-stylo/debug: [ 'stylo', 'autoland', 'mozilla-inbound', 'mozilla-central', 'try' ]
             default: []
     e10s:
         # run only e10s tests for this platform see bug 1343301