--- a/taskcluster/ci/desktop-test/tests.yml
+++ b/taskcluster/ci/desktop-test/tests.yml
@@ -25,16 +25,17 @@ cppunit:
                     - remove_executables.py
         extra-options:
             - --cppunittest-suite=cppunittest
 
 crashtest:
     description: "Crashtest run"
     suite: reftest/crashtest
     treeherder-symbol: tc-R(C)
+    docker-image: {"in-tree": "desktop1604-test"}
     mozharness:
         script: desktop_unittest.py
         chunked: true
         no-read-buildbot-config: true
         config:
             by-test-platform:
                 default:
                     - unittests/linux_unittest.py
@@ -383,32 +384,34 @@ mochitest-webgl:
     # Bug 1296733: llvmpipe with mesa 9.2.1 lacks thread safety
     allow-software-gl-layers: false
 
 reftest:
     description: "Reftest run"
     suite: reftest/reftest
     treeherder-symbol: tc-R(R)
     chunks: 8
+    docker-image: {"in-tree": "desktop1604-test"}
     mozharness:
         script: desktop_unittest.py
         no-read-buildbot-config: true
         config:
             by-test-platform:
                 default:
                     - unittests/linux_unittest.py
                     - remove_executables.py
         extra-options:
             - --reftest-suite=reftest
 
 reftest-no-accel:
     description: "Reftest not accelerated run"
     suite: reftest/reftest-no-accel
     treeherder-symbol: tc-R(Ru)
     chunks: 8
+    docker-image: {"in-tree": "desktop1604-test"}
     mozharness:
         script: desktop_unittest.py
         no-read-buildbot-config: true
         config:
             by-test-platform:
                 default:
                     - unittests/linux_unittest.py
                     - remove_executables.py