diff --git a/api/tests/src/api/opportunities_v1/test_opportunity_route_search.py b/api/tests/src/api/opportunities_v1/test_opportunity_route_search.py
index 121561646..e8912e01f 100644
--- a/api/tests/src/api/opportunities_v1/test_opportunity_route_search.py
+++ b/api/tests/src/api/opportunities_v1/test_opportunity_route_search.py
@@ -723,7 +723,14 @@ def test_search_filters_200(
             (get_search_request(post_date={"start_date": None, "end_date": "2020-02-01"}), 200),
             (get_search_request(post_date={"start_date": "2020-01-01", "end_date": "2020-02-01"}), 200),
             (get_search_request(post_date={"start_date": "I am not a date"}), 422),
+            (get_search_request(post_date={"start_date": "123-456-789"}), 422),
+            (get_search_request(post_date={"start_date": "5"}), 422),
+            (get_search_request(post_date={"start_date": 5}), 422),
             (get_search_request(post_date={"end_date": "I am not a date"}), 422),
+            (get_search_request(post_date={"end_date": "123-456-789"}), 422),
+            (get_search_request(post_date={"end_date": "5"}), 422),
+            (get_search_request(post_date={"end_date": 5}), 422),
+
             # Close Date
             (get_search_request(close_date={"start_date": None}), 200),
             (get_search_request(close_date={"end_date": None}), 200),