diff --git a/python_analysis_script/tests/data/sample_backtest.csv b/python_analysis_script/tests/data/sample_backtest.csv
new file mode 100644
index 0000000..b9d585e
--- /dev/null
+++ b/python_analysis_script/tests/data/sample_backtest.csv
@@ -0,0 +1,7 @@
+timestamp,decision,margin,flaky_flag,subset_flip_count,mischfenster_p95
+2024-05-01T10:00:00,pass,0.12,false,0,0.85
+2024-05-02T10:00:00,warn,0.05,false,1,0.78
+2024-05-03T10:00:00,fail,-0.10,false,2,0.62
+2024-05-04T10:00:00,pass,0.25,true,0,0.90
+2024-05-05T10:00:00,warn,0.02,true,3,0.70
+2024-05-06T10:00:00,fail,-0.20,false,4,0.55