diff --git a/artifact_1/tests/data/sample_logentry.json b/artifact_1/tests/data/sample_logentry.json
new file mode 100644
index 0000000..4b63d43
--- /dev/null
+++ b/artifact_1/tests/data/sample_logentry.json
@@ -0,0 +1,7 @@
+{
+  "epoch_ms": 1678591200000,
+  "monotonic_ns": 1234567890123456,
+  "tz_offset_minutes": 60,
+  "run_id": "DST_RUN_01",
+  "step_id": "spring_forward_02_to_03"
+}
\ No newline at end of file