diff --git a/report_generator/tests/data/drift_metrics.json b/report_generator/tests/data/drift_metrics.json
new file mode 100644
index 0000000..695a9d8
--- /dev/null
+++ b/report_generator/tests/data/drift_metrics.json
@@ -0,0 +1,6 @@
+{
+  "warn_count": 15,
+  "fail_count": 3,
+  "total_runs": 50,
+  "window_size": 50
+}
\ No newline at end of file