diff --git a/app/tests/hanging_protocols_tests/test_forms.py b/app/tests/hanging_protocols_tests/test_forms.py
index 8a1420a2e..0ba2189f4 100644
--- a/app/tests/hanging_protocols_tests/test_forms.py
+++ b/app/tests/hanging_protocols_tests/test_forms.py
@@ -330,6 +330,42 @@ def test_hanging_protocol_clientside():
             },
         ),
         ("main", False, {"json": ["Enter a valid JSON."]}),
+        (
+            "[1,2,3,4,5]",
+            False,
+            {
+                "json": [
+                    "JSON does not fulfill schema: instance None of are valid under the given schema"
+                ]
+            },
+        ),
+        (
+            '["test1", "test2", "test3"]',
+            False,
+            {
+                "json": [
+                    "JSON does not fulfill schema: instance None of are valid under the given schema"
+                ]
+            },
+        ),
+        (
+            "[[],[],[]]",
+            False,
+            {
+                "json": [
+                    "JSON does not fulfill schema: instance None of are valid under the given schema"
+                ]
+            },
+        ),
+        (
+            "[{},{},{}]",
+            False,
+            {
+                "json": [
+                    "JSON does not fulfill schema: instance has non-unique elements"
+                ]
+            },
+        ),
         (
             "true",
             False,