diff --git a/logging_tool/tests/data/sample_preflights.json b/logging_tool/tests/data/sample_preflights.json
new file mode 100644
index 0000000..8c5c5df
--- /dev/null
+++ b/logging_tool/tests/data/sample_preflights.json
@@ -0,0 +1,30 @@
+[
+  {
+    "timestamp": "2024-03-15T10:22:00Z",
+    "measured_p": 0.091,
+    "freeze_ok": false,
+    "setup_fingerprint": "abcd1234",
+    "policy_hash": "9de0fdf3"
+  },
+  {
+    "timestamp": "2024-03-15T10:24:30Z",
+    "measured_p": 0.085,
+    "freeze_ok": true,
+    "setup_fingerprint": "abcd1234",
+    "policy_hash": "9de0fdf3"
+  },
+  {
+    "timestamp": "2024-03-15T10:28:00Z",
+    "measured_p": 0.0975,
+    "freeze_ok": true,
+    "setup_fingerprint": "efgh5678",
+    "policy_hash": "aa88cc77"
+  },
+  {
+    "timestamp": "2024-03-15T10:31:15Z",
+    "measured_p": 0.105,
+    "freeze_ok": false,
+    "setup_fingerprint": "efgh5678",
+    "policy_hash": "aa88cc77"
+  }
+]
\ No newline at end of file