diff --git a/image_processing/tests/data/test_metadata.json b/image_processing/tests/data/test_metadata.json
new file mode 100644
index 0000000..ea2c0a8
--- /dev/null
+++ b/image_processing/tests/data/test_metadata.json
@@ -0,0 +1,27 @@
+[
+  {
+    "frame_id": "frame_001",
+    "mean_noise": 0.0123,
+    "mean_lum": 105.7
+  },
+  {
+    "frame_id": "frame_002",
+    "mean_noise": 0.0156,
+    "mean_lum": 108.1
+  },
+  {
+    "frame_id": "frame_003",
+    "mean_noise": 0.0109,
+    "mean_lum": 101.4
+  },
+  {
+    "frame_id": "frame_004",
+    "mean_noise": 0.0182,
+    "mean_lum": 110.0
+  },
+  {
+    "frame_id": "frame_missing_lum",
+    "mean_noise": 0.0115,
+    "mean_lum": null
+  }
+]
\ No newline at end of file