diff --git a/src/rdflib_endpoint/sparql_router.py b/src/rdflib_endpoint/sparql_router.py
index bdd7326..d3db450 100644
--- a/src/rdflib_endpoint/sparql_router.py
+++ b/src/rdflib_endpoint/sparql_router.py
@@ -19,7 +19,6 @@
     "SparqlRouter",
 ]
 
-
 EXAMPLE_SPARQL = """\
 PREFIX myfunctions: <https://w3id.org/um/sparql-functions/>
 
diff --git a/tests/test_example_app.py b/tests/test_example_app.py
index 1099165..4c397fc 100644
--- a/tests/test_example_app.py
+++ b/tests/test_example_app.py
@@ -21,7 +21,7 @@ def test_service_description():
 
 
 def test_custom_concat():
-    response = endpoint.get("/?query=" + custom_concat_query, headers={"accept": "application/json"})
+    response = endpoint.get("/", params={"query": custom_concat_query}, headers={"accept": "application/json"})
     # print(response.json())
     assert response.status_code == 200
     assert response.json()["results"]["bindings"][0]["concat"]["value"] == "Firstlast"
diff --git a/tests/test_rdflib_endpoint.py b/tests/test_rdflib_endpoint.py
index 2a5989f..eea39f3 100644
--- a/tests/test_rdflib_endpoint.py
+++ b/tests/test_rdflib_endpoint.py
@@ -28,7 +28,7 @@ def test_service_description():
 
 
 def test_custom_concat_json():
-    response = endpoint.get("/?query=" + concat_select, headers={"accept": "application/json"})
+    response = endpoint.get("/", params={"query": concat_select}, headers={"accept": "application/json"})
     # print(response.json())
     assert response.status_code == 200
     assert response.json()["results"]["bindings"][0]["concat"]["value"] == "Firstlast"