diff --git a/tests/test_schema1.py b/tests/test_schema1.py
index 14caed9..0d14faa 100644
--- a/tests/test_schema1.py
+++ b/tests/test_schema1.py
@@ -322,3 +322,16 @@ def test_geoloc(schema1, app, admin):
         }
     ]
 
+
+def test_filter_type_mismatch(schema1, app, admin):
+    # test conversion to Javascript declaration
+    visu = Visualization.from_json({
+        'warehouse': 'schema1',
+        'cube': 'facts1',
+        'representation': 'graphical',
+        'measure': 'simple_count',
+        'filters': {
+            'string': [1],
+        }
+    })
+    assert visu.json_data() == [{'coords': [], 'measures': [{'value': 17}]}]