diff --git a/tests/debug_test.py b/tests/debug_test.py
index f4f983b9..a1d465c3 100644
--- a/tests/debug_test.py
+++ b/tests/debug_test.py
@@ -18,7 +18,7 @@ def debug_session_factory(*args, **kwargs) -> httpx.Client:
         p = api._.find_pet_by_id(data={}, parameters={"id": 1})
 
 
-@pytest.mark.asyncio
+@pytest.mark.asyncio(loop_scope="session")
 async def test_debug_log_async(httpx_mock, petstore_expanded):
     httpx_mock.add_response(headers={"Content-Type": "application/json"}, json={"foo": 1})
 
diff --git a/tests/schema_test.py b/tests/schema_test.py
index 69686a4a..f79ecb8a 100644
--- a/tests/schema_test.py
+++ b/tests/schema_test.py
@@ -369,24 +369,24 @@ def test_schema_discriminated_union_invalid_array(with_schema_discriminated_unio
 def test_schema_discriminated_union_warnings(with_schema_discriminated_union_warning, openapi_version):
     from aiopenapi3.errors import DiscriminatorWarning
 
-    with pytest.warns(
-        DiscriminatorWarning, match=r"Discriminated Union member \S+ without const/enum key property \S+"
-    ):
-        api = OpenAPI("/", with_schema_discriminated_union_warning)
-
-    with pytest.warns(
-        DiscriminatorWarning,
-        match=r"Discriminated Union member key property enum mismatches property mapping \S+ \!= \S+",
+    with (
+        pytest.warns(
+            DiscriminatorWarning,
+            match=r"Discriminated Union member key property enum mismatches property mapping \S+ \!= \S+",
+        ),
+        pytest.warns(DiscriminatorWarning, match=r"Discriminated Union member \S+ without const/enum key property \S+"),
     ):
         api = OpenAPI("/", with_schema_discriminated_union_warning)
 
     if (openapi_version.major, openapi_version.minor, openapi_version.patch) >= (3, 1, 0):
         s = copy.deepcopy(with_schema_discriminated_union_warning)
-        #        del s["components"]["schemas"]["C"]["properties"]["object_type"]["enum"]
-        s["components"]["schemas"]["C"]["properties"]["object_type"]["const"] = "f"
+        del s["components"]["schemas"]["B"]["properties"]["object_type"]["enum"]
+        s["components"]["schemas"]["B"]["properties"]["object_type"]["enum"] = ["f"]
+        s["components"]["schemas"]["A"]["properties"]["object_type"]["enum"] = ["a"]
+        s["components"]["schemas"]["C"]["properties"]["object_type"]["const"] = "c"
         with pytest.warns(
             DiscriminatorWarning,
-            match=r"Discriminated Union member key property const mismatches property mapping \S+ \!= \S+",
+            match=r"Discriminated Union member key property enum mismatches property mapping \S+ \!= \S+",
         ):
             api = OpenAPI("/", s)
 
@@ -493,6 +493,7 @@ def test_schema_enum_array(with_schema_enum_array):
         api = OpenAPI("/", with_schema_enum_array)
 
 
+@pytest.mark.httpx_mock(can_send_already_matched_responses=True)
 def test_schema_pathitems(httpx_mock, with_schema_pathitems):
     httpx_mock.add_response(headers={"Content-Type": "application/json"}, json={"foo": "bar"})
     api = OpenAPI("/", with_schema_pathitems, session_factory=httpx.Client)