diff --git a/data_analysis/tests/data/sample_run_data.json b/data_analysis/tests/data/sample_run_data.json
new file mode 100644
index 0000000..f4d5db1
--- /dev/null
+++ b/data_analysis/tests/data/sample_run_data.json
@@ -0,0 +1,38 @@
+[
+  {
+    "run_id": "RUN_001",
+    "timestamp": "2024-01-12T08:02:35Z",
+    "delta_t": 0.125,
+    "expiring_at": "2024-01-12T08:10:00Z"
+  },
+  {
+    "run_id": "RUN_002",
+    "timestamp": "2024-01-12T08:05:12Z",
+    "delta_t": -0.034,
+    "expiring_at": "2024-01-12T08:15:00Z"
+  },
+  {
+    "run_id": "RUN_003",
+    "timestamp": "2024-01-12T09:00:00Z",
+    "delta_t": 0.002,
+    "expiring_at": "2024-01-12T09:10:00Z"
+  },
+  {
+    "run_id": "RUN_004",
+    "timestamp": "2024-01-12T09:05:46Z",
+    "delta_t": -0.056,
+    "expiring_at": "2024-01-12T09:15:30Z"
+  },
+  {
+    "run_id": "RUN_005",
+    "timestamp": "2024-01-12T09:20:11Z",
+    "delta_t": 0.010,
+    "expiring_at": "2024-01-12T09:30:00Z"
+  },
+  {
+    "run_id": "RUN_006",
+    "timestamp": "2024-01-12T09:25:50Z",
+    "delta_t": -0.120,
+    "expiring_at": "2024-01-12T09:40:00Z"
+  }
+]
\ No newline at end of file