diff --git a/src/dashboard/get_chart_data/get_chart_data.py b/src/dashboard/get_chart_data/get_chart_data.py
index 1348dc9..38ec8b7 100644
--- a/src/dashboard/get_chart_data/get_chart_data.py
+++ b/src/dashboard/get_chart_data/get_chart_data.py
@@ -159,7 +159,7 @@ def _build_query(query_params: dict, filter_groups: list, path_params: dict) ->
                 config_params.append(params)
                 if filter_config[1] in NONE_FILTERS or filter_config[0] != query_params["column"]:
                     if params.get("bound", "").casefold() == "none":
-                        params["bound"] == "cumulus__none"
+                        params["bound"] = "cumulus__none"
                     none_params.append(params)
             else:
                 raise errors.AggregatorFilterError(
diff --git a/tests/dashboard/test_get_chart_data.py b/tests/dashboard/test_get_chart_data.py
index c6ebcaf..fb52f12 100644
--- a/tests/dashboard/test_get_chart_data.py
+++ b/tests/dashboard/test_get_chart_data.py
@@ -1,7 +1,9 @@
 import json
 import os
+from contextlib import nullcontext as does_not_raise
 from unittest import mock
 
+import botocore
 import pandas
 import pytest
 
@@ -29,7 +31,7 @@ def mock_data_frame(filter_param):
 @mock.patch("src.dashboard.get_chart_data.get_chart_data._get_table_cols", mock_get_table_cols)
 @mock.patch.dict(os.environ, MOCK_ENV)
 @pytest.mark.parametrize(
-    "query_params,filter_groups,path_params,query_str",
+    "query_params,filter_groups,path_params,query_str, raises",
     [
         (
             {"column": "gender"},
@@ -54,6 +56,7 @@ def mock_data_frame(filter_param):
     )
 ORDER BY
     "gender\"""",
+            does_not_raise(),
         ),
         (
             {"column": "gender", "stratifier": "race"},
@@ -77,6 +80,7 @@ def mock_data_frame(filter_param):
         AND "race" IS NOT NULL
 ORDER BY
         "race", "gender\"""",
+            does_not_raise(),
         ),
         (
             {"column": "gender"},
@@ -115,10 +119,11 @@ def mock_data_frame(filter_param):
     )
 ORDER BY
     "gender\"""",
+            does_not_raise(),
         ),
         (
             {"column": "gender", "stratifier": "race"},
-            ["gender:strEq:female"],
+            ["gender:strEq:none"],
             {"data_package_id": "test_study"},
             f"""SELECT
         "race",
@@ -134,7 +139,7 @@ def mock_data_frame(filter_param):
                 (
                     
         (
-            "gender" LIKE 'female'
+            "gender" LIKE 'cumulus__none'
                     )
                 )
         )
@@ -144,7 +149,7 @@ def mock_data_frame(filter_param):
                 (
                     
         (
-            "gender" LIKE 'female'
+            "gender" LIKE 'cumulus__none'
                     )
                 )
         )
@@ -152,6 +157,7 @@ def mock_data_frame(filter_param):
         AND "race" IS NOT NULL
 ORDER BY
         "race", "gender\"""",
+            does_not_raise(),
         ),
         (
             {"column": "gender", "stratifier": "race"},
@@ -195,6 +201,7 @@ def mock_data_frame(filter_param):
         AND "race" IS NOT NULL
 ORDER BY
         "race", "gender\"""",
+            does_not_raise(),
         ),
         (
             {"column": "gender", "stratifier": "race"},
@@ -243,12 +250,25 @@ def mock_data_frame(filter_param):
         AND "race" IS NOT NULL
 ORDER BY
         "race", "gender\"""",
+            does_not_raise(),
+        ),
+        (
+            {"column": "gender", "stratifier": "race"},
+            [
+                "gender:invalid:a",
+            ],
+            {"data_package_id": "test_study"},
+            "",
+            # The deployed class vs testing module approach makes getting
+            # the actual error raised here fussy.
+            pytest.raises(Exception),
         ),
     ],
 )
-def test_build_query(query_params, filter_groups, path_params, query_str):
-    query, _ = get_chart_data._build_query(query_params, filter_groups, path_params)
-    assert query == query_str
+def test_build_query(query_params, filter_groups, path_params, query_str, raises):
+    with raises:
+        query, _ = get_chart_data._build_query(query_params, filter_groups, path_params)
+        assert query == query_str
 
 
 @pytest.mark.parametrize(
@@ -289,6 +309,18 @@ def test_get_data_cols(mock_bucket):
     assert res == list(cols)
 
 
+@mock.patch("botocore.client")
+def test_get_data_cols_err(mock_client):
+    mock_clientobj = mock_client.ClientCreator.return_value.create_client.return_value
+    mock_clientobj.get_object.side_effect = [
+        None,
+        botocore.exceptions.ClientError({}, {}),
+    ]
+    with pytest.raises(Exception):
+        table_id = f"{EXISTING_STUDY}__{EXISTING_DATA_P}__{EXISTING_VERSION}"
+        get_chart_data._get_table_cols(table_id)
+
+
 @mock.patch(
     "src.dashboard.get_chart_data.get_chart_data._build_query",
     lambda query_params, filter_groups, path_params: (
@@ -320,3 +352,14 @@ def test_handler():
         '"rowCount": 2, "totalCount": 20, "data": [{"rows": [["male", 10], '
         '["female", 10]]}]}'
     )
+    event = {
+        "queryStringParameters": {"column": "gender", "filter": "gender:strEq:female"},
+        "multiValueQueryStringParameters": {},
+        "pathParameters": {},
+    }
+    res = get_chart_data.chart_data_handler(event, {})
+    assert res["body"] == (
+        '{"column": "gender", "filters": ["gender:strEq:female"], '
+        '"rowCount": 2, "totalCount": 20, "data": [{"rows": [["male", 10], '
+        '["female", 10]]}]}'
+    )