diff --git a/ci/test_files_touched.py b/ci/test_files_touched.py
index 75a788a4..bd0897c9 100644
--- a/ci/test_files_touched.py
+++ b/ci/test_files_touched.py
@@ -79,7 +79,8 @@
         'python tests/test_analyze_docker_dockerfile.py',
         'python tests/test_analyze_common.py',
         'tern report -i golang:alpine',
-        'tern report -d samples/alpine_python/Dockerfile'],
+        'tern report -d samples/alpine_python/Dockerfile',
+        'tern lock Dockerfile'],
     # tern/report
     re.compile('tern/report'): [
         'tern report -i golang:alpine',