diff --git a/artifact.data_logger/tests/data/sample_metrics.json b/artifact.data_logger/tests/data/sample_metrics.json
new file mode 100644
index 0000000..7b6992d
--- /dev/null
+++ b/artifact.data_logger/tests/data/sample_metrics.json
@@ -0,0 +1,6 @@
+{
+  "setup_fingerprint": "setup_abc123",
+  "policy_hash": "policy_xyz789",
+  "epoch_ms": 1716445123456,
+  "near_expiry_unpinned": 0.083
+}
\ No newline at end of file