diff --git a/rollout_report_generator/tests/data/sample_rollout.csv b/rollout_report_generator/tests/data/sample_rollout.csv
new file mode 100644
index 0000000..4f1ecf1
--- /dev/null
+++ b/rollout_report_generator/tests/data/sample_rollout.csv
@@ -0,0 +1,6 @@
+unknown_rate,warn_rate,policy_hash,runs
+0.01,0.05,abc123,10
+0.02,0.10,abc123,12
+0.00,0.04,def456,9
+0.03,0.15,ghi789,15
+0.05,0.20,jkl999,8