diff --git a/data_logging/tests/data/sample_log.json b/data_logging/tests/data/sample_log.json
new file mode 100644
index 0000000..234caec
--- /dev/null
+++ b/data_logging/tests/data/sample_log.json
@@ -0,0 +1,17 @@
+[
+  {
+    "timestamp": "2024-05-12T10:15:30Z",
+    "value": -0.0025,
+    "status": "valid"
+  },
+  {
+    "timestamp": "2024-05-12T10:16:05Z",
+    "value": -0.0008,
+    "status": "valid"
+  },
+  {
+    "timestamp": "2024-05-12T10:16:45Z",
+    "value": -0.0041,
+    "status": "error"
+  }
+]
\ No newline at end of file