diff --git a/robustness_check/tests/data/frozen_runs.json b/robustness_check/tests/data/frozen_runs.json
new file mode 100644
index 0000000..134fea4
--- /dev/null
+++ b/robustness_check/tests/data/frozen_runs.json
@@ -0,0 +1,32 @@
+[
+  {
+    "run_id": 1,
+    "p95_value": 0.87,
+    "pinned": true
+  },
+  {
+    "run_id": 2,
+    "p95_value": 0.91,
+    "pinned": true
+  },
+  {
+    "run_id": 3,
+    "p95_value": 0.53,
+    "pinned": false
+  },
+  {
+    "run_id": 4,
+    "p95_value": 0.49,
+    "pinned": false
+  },
+  {
+    "run_id": 5,
+    "p95_value": 0.88,
+    "pinned": true
+  },
+  {
+    "run_id": 6,
+    "p95_value": 0.47,
+    "pinned": false
+  }
+]
\ No newline at end of file