--- a/taskcluster/taskgraph/transforms/tests.py
+++ b/taskcluster/taskgraph/transforms/tests.py
@@ -507,16 +507,17 @@ def enable_code_coverage(config, tests):
         if test['build-platform'] == 'linux64-ccov/opt':
             test['mozharness'].setdefault('extra-options', []).append('--code-coverage')
             test['when'] = {}
             test['instance-size'] = 'xlarge'
             test['run-on-projects'] = ['mozilla-central']
 
             if test['test-name'].startswith('talos'):
                 test['max-run-time'] = 7200
+                test['docker-image'] = {"in-tree": "desktop1604-test"}
                 test['mozharness']['config'] = ['talos/linux64_config_taskcluster.py']
                 test['mozharness']['extra-options'].append('--add-option')
                 test['mozharness']['extra-options'].append('--cycles,1')
                 test['mozharness']['extra-options'].append('--add-option')
                 test['mozharness']['extra-options'].append('--tppagecycles,1')
                 test['mozharness']['extra-options'].append('--add-option')
                 test['mozharness']['extra-options'].append('--no-upload-results')
         elif test['build-platform'] == 'linux64-jsdcov/opt':