diff --git a/log_analysis/tests/data/sample_run1.csv b/log_analysis/tests/data/sample_run1.csv
new file mode 100644
index 0000000..da5a811
--- /dev/null
+++ b/log_analysis/tests/data/sample_run1.csv
@@ -0,0 +1,6 @@
+timestamp,run_id,policy_hash,warn_rate,unknown_rate,t_index_visible,t_gate_read,pinned_status
+2024-06-01T10:00:00,run1,abc123,0.05,0.01,1.25,2.10,pinned
+2024-06-01T10:05:00,run1,abc123,0.04,0.02,1.40,2.25,pinned
+2024-06-01T10:10:00,run1,abc123,0.06,0.00,1.35,2.15,pinned
+2024-06-01T10:15:00,run1,abc123,0.05,0.01,1.50,2.30,pinned
+2024-06-01T10:20:00,run1,abc123,0.07,0.03,1.45,2.28,unpinned
\ No newline at end of file