diff --git a/fvh3t/core/trajectory.py b/fvh3t/core/trajectory.py
index 87c7b1a..54e6825 100644
--- a/fvh3t/core/trajectory.py
+++ b/fvh3t/core/trajectory.py
@@ -1,4 +1,4 @@
-from typing import Tuple, NamedTuple
+from typing import NamedTuple
 
 from qgis.core import QgsGeometry, QgsPointXY, QgsVectorLayer, QgsWkbTypes
 
@@ -24,8 +24,8 @@ class Trajectory:
     of nodes which have a location and a timestamp
     """
 
-    def __init__(self, nodes: Tuple[TrajectoryNode]) -> None:
-        self.__nodes: Tuple[TrajectoryNode] = nodes
+    def __init__(self, nodes: tuple[TrajectoryNode, ...]) -> None:
+        self.__nodes: tuple[TrajectoryNode, ...] = nodes
 
     def as_geometry(self) -> QgsGeometry:
         return QgsGeometry.fromPolylineXY([node.point for node in self.__nodes])
diff --git a/tests/conftest.py b/tests/conftest.py
index a607750..09a726b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -15,6 +15,7 @@
 """
 
 import pytest
+from fvh3t.core.gate import Gate
 
 from fvh3t.core.trajectory import Trajectory, TrajectoryNode
 from qgis.core import QgsGeometry, QgsPointXY
@@ -25,4 +26,4 @@ def two_node_trajectory():
 
 @pytest.fixture
 def two_point_gate():
-    return QgsGeometry.fromPolylineXY([QgsPointXY(-0.5, 0.5), QgsPointXY(0.5, 0.5)])
+    return Gate(QgsGeometry.fromPolylineXY([QgsPointXY(-0.5, 0.5), QgsPointXY(0.5, 0.5)]))