diff --git a/tests/asgi/test_websockets_graphql_transport_ws.py b/tests/asgi/test_websockets_graphql_transport_ws.py
index 7e2d3c17..5820d6e1 100644
--- a/tests/asgi/test_websockets_graphql_transport_ws.py
+++ b/tests/asgi/test_websockets_graphql_transport_ws.py
@@ -11,6 +11,7 @@
 from ariadne.asgi.handlers import GraphQLTransportWSHandler
 from ariadne.exceptions import WebSocketConnectionError
 from ariadne.utils import get_operation_type
+from .websocket_utils import wait_for_condition
 
 
 def test_field_can_be_subscribed_using_websocket_connection_graphql_transport_ws(
@@ -681,6 +682,8 @@ async def on_complete(websocket, operation):
 
 def test_custom_websocket_on_disconnect_is_called_on_invalid_operation_graphql_transport_ws(
     schema,
+    timeout=5,
+    poll_interval=0.1,
 ):
     def on_disconnect(websocket):
         websocket.scope["on_disconnect"] = True
@@ -694,9 +697,15 @@ def on_disconnect(websocket):
         response = ws.receive_json()
         assert response["type"] == GraphQLTransportWSHandler.GQL_CONNECTION_ACK
         ws.send_json({"type": "INVALID"})
-        assert "on_disconnect" not in ws.scope
+        condition_met = wait_for_condition(
+            lambda: "on_disconnect" in ws.scope,
+            timeout,
+            poll_interval,
+        )
 
-    assert ws.scope["on_disconnect"] is True
+        assert (
+            condition_met and ws.scope.get("on_disconnect") is True
+        ), "on_disconnect should be set in ws.scope after invalid message"
 
 
 def test_custom_websocket_on_disconnect_is_called_on_connection_close_graphql_transport_ws(
@@ -720,6 +729,8 @@ def on_disconnect(websocket):
 
 def test_custom_websocket_on_disconnect_is_awaited_if_its_async_graphql_transport_ws(
     schema,
+    timeout=5,
+    poll_interval=0.1,
 ):
     async def on_disconnect(websocket):
         websocket.scope["on_disconnect"] = True
@@ -733,9 +744,15 @@ async def on_disconnect(websocket):
         response = ws.receive_json()
         assert response["type"] == GraphQLTransportWSHandler.GQL_CONNECTION_ACK
         ws.send_json({"type": "INVALID"})
-        assert "on_disconnect" not in ws.scope
+        condition_met = wait_for_condition(
+            lambda: "on_disconnect" in ws.scope,
+            timeout,
+            poll_interval,
+        )
 
-    assert ws.scope["on_disconnect"] is True
+        assert (
+            condition_met and ws.scope.get("on_disconnect") is True
+        ), "on_disconnect should be set in ws.scope after invalid message"
 
 
 def test_error_in_custom_websocket_on_disconnect_is_handled_graphql_transport_ws(
diff --git a/tests/asgi/test_websockets_graphql_ws.py b/tests/asgi/test_websockets_graphql_ws.py
index f7a47761..c5510e3b 100644
--- a/tests/asgi/test_websockets_graphql_ws.py
+++ b/tests/asgi/test_websockets_graphql_ws.py
@@ -8,6 +8,7 @@
 from ariadne.asgi import GraphQL
 from ariadne.asgi.handlers import GraphQLWSHandler
 from ariadne.exceptions import WebSocketConnectionError
+from .websocket_utils import wait_for_condition
 
 
 def test_field_can_be_subscribed_using_websocket_connection(client):
@@ -540,7 +541,11 @@ def on_complete(websocket, operation):
     assert ws.scope["on_complete"] is True
 
 
-def test_custom_websocket_on_complete_is_called_on_terminate(schema):
+def test_custom_websocket_on_complete_is_called_on_terminate(
+    schema,
+    timeout=5,
+    poll_interval=0.1,
+):
     def on_complete(websocket, operation):
         assert operation.name == "TestOp"
         websocket.scope["on_complete"] = True
@@ -568,9 +573,15 @@ def on_complete(websocket, operation):
         assert response["id"] == "test1"
         assert response["payload"]["data"] == {"ping": "pong"}
         ws.send_json({"type": GraphQLWSHandler.GQL_CONNECTION_TERMINATE})
-        assert "on_complete" not in ws.scope
+        condition_met = wait_for_condition(
+            lambda: "on_complete" in ws.scope,
+            timeout,
+            poll_interval,
+        )
 
-    assert ws.scope["on_complete"] is True
+        assert (
+            condition_met and ws.scope.get("on_complete") is True
+        ), "on_complete should be set in ws.scope after invalid message"
 
 
 def test_custom_websocket_on_complete_is_called_on_disconnect(schema):
@@ -605,7 +616,11 @@ def on_complete(websocket, operation):
     assert ws.scope["on_complete"] is True
 
 
-def test_custom_websocket_on_complete_is_awaited_if_its_async(schema):
+def test_custom_websocket_on_complete_is_awaited_if_its_async(
+    schema,
+    timeout=5,
+    poll_interval=0.1,
+):
     async def on_complete(websocket, operation):
         assert operation.name == "TestOp"
         websocket.scope["on_complete"] = True
@@ -634,9 +649,15 @@ async def on_complete(websocket, operation):
         assert response["payload"]["data"] == {"ping": "pong"}
         ws.send_json({"type": GraphQLWSHandler.GQL_STOP})
         ws.send_json({"type": GraphQLWSHandler.GQL_CONNECTION_TERMINATE})
-        assert "on_complete" in ws.scope
+        condition_met = wait_for_condition(
+            lambda: "on_complete" in ws.scope,
+            timeout,
+            poll_interval,
+        )
 
-    assert ws.scope["on_complete"] is True
+        assert (
+            condition_met and ws.scope.get("on_complete") is True
+        ), "on_complete should be set in ws.scope after invalid message"
 
 
 def test_error_in_custom_websocket_on_complete_is_handled(schema):
diff --git a/tests/asgi/websocket_utils.py b/tests/asgi/websocket_utils.py
new file mode 100644
index 00000000..a3217317
--- /dev/null
+++ b/tests/asgi/websocket_utils.py
@@ -0,0 +1,18 @@
+import time
+
+
+def wait_for_condition(condition_func, timeout=5, poll_interval=0.1):
+    """
+    This function is particularly useful in scenarios where asynchronous operations
+    are involved. For instance, in a WebSocket-based system, certain events or
+    state changes, like setting a flag in a callback, may not occur instantly.
+    The wait_for_condition function ensures that the test waits long enough for
+    these asynchronous events to complete, preventing race conditions or false
+    negatives in test outcomes.
+    """
+    start_time = time.time()
+    while time.time() - start_time < timeout:
+        if condition_func():
+            return True
+        time.sleep(poll_interval)
+    return False