diff --git a/trace_agg/tests/data/sample_trace.json b/trace_agg/tests/data/sample_trace.json
new file mode 100644
index 0000000..15e37ea
--- /dev/null
+++ b/trace_agg/tests/data/sample_trace.json
@@ -0,0 +1,20 @@
+[
+  {
+    "entry_time": 1000000.0,
+    "first_read_time": 1000500.0,
+    "baseline_recalc_time": 1001200.0,
+    "delta": 700.0
+  },
+  {
+    "entry_time": 2000000.0,
+    "first_read_time": 2000600.0,
+    "baseline_recalc_time": 2001400.0,
+    "delta": 800.0
+  },
+  {
+    "entry_time": 3000000.0,
+    "first_read_time": 3000700.0,
+    "baseline_recalc_time": 3001500.0,
+    "delta": 800.0
+  }
+]
\ No newline at end of file