diff --git a/audit_analysis/tests/data/sample_audit.csv b/audit_analysis/tests/data/sample_audit.csv
new file mode 100644
index 0000000..95d4abf
--- /dev/null
+++ b/audit_analysis/tests/data/sample_audit.csv
@@ -0,0 +1,11 @@
+run_id,status,cause,duration_s
+1,passed,,30
+2,unknown,artefact_missing,45
+3,failed,contract_error,25
+4,unknown,io_failure,40
+5,unknown,artefact_missing,50
+6,passed,,20
+7,unknown,contract_error,60
+8,failed,contract_error,35
+9,unknown,io_failure,55
+10,unknown,artefact_missing,48