diff --git a/tests/sims/simulation_2_3_0.json b/tests/sims/simulation_2_3_0.json
index 0f1a8a774..6a5a1fb6a 100644
--- a/tests/sims/simulation_2_3_0.json
+++ b/tests/sims/simulation_2_3_0.json
@@ -681,6 +681,7 @@
                 "offset": 5.0
             },
             "name": null,
+            "interpolate": true,
             "polarization": "Hx"
         },
         {
@@ -704,8 +705,8 @@
                 "offset": 5.0
             },
             "name": null,
-            "polarization": "Ex",
-            "interpolate": true
+            "interpolate": true,
+            "polarization": "Ex"
         },
         {
             "type": "ModeSource",
@@ -891,6 +892,7 @@
                 "offset": 5.0
             },
             "name": null,
+            "interpolate": true,
             "current_dataset": {
                 "type": "FieldDataset",
                 "Ex": "ScalarFieldDataArray",
diff --git a/tests/test_web/test_webapi.py b/tests/test_web/test_webapi.py
index 36801e9c7..859e248c4 100644
--- a/tests/test_web/test_webapi.py
+++ b/tests/test_web/test_webapi.py
@@ -3,6 +3,7 @@
 import pytest
 import responses
 from _pytest import monkeypatch
+import os
 
 import tidy3d as td
 import tidy3d.web as web
@@ -20,8 +21,11 @@
 
 from tidy3d.__main__ import main
 
+from ..utils import TMP_DIR
+
 # variables used below
-FNAME_TMP = "tests/tmp/web_test_tmp.json"
+FNAME_TMP = os.path.join(TMP_DIR, "web_test_tmp.json")
+
 TASK_NAME = "task_name_test"
 TASK_ID = "1234"
 CREATED_AT = "2022-01-01T00:00:00.000Z"
@@ -29,6 +33,10 @@
 FLEX_UNIT = 1.0
 EST_FLEX_UNIT = 11.11
 
+# make the TMP directory if it doesnt exist
+if not os.path.exists(TMP_DIR):
+    os.mkdir(TMP_DIR)
+
 
 def make_sim():
     """Makes a simulation."""