diff --git a/integrations/jina/tests/test_reader_connector.py b/integrations/jina/tests/test_reader_connector.py
index 30a4cff72..93a62afe8 100644
--- a/integrations/jina/tests/test_reader_connector.py
+++ b/integrations/jina/tests/test_reader_connector.py
@@ -18,7 +18,7 @@ def test_init_with_custom_parameters(self):
         assert reader.mode == JinaReaderMode.READ
         assert reader.api_key.resolve_value() == "test-api-key"
         assert reader.json_response is False
-        assert "Accept" not in reader._session.headers
+        assert "application/json" not in reader._session.headers.values()
 
     def test_to_dict(self):
         reader = JinaReaderConnector(mode="SEARCH", api_key=Secret.from_token("test-api-key"), json_response=True)