diff --git a/tests/test_graph.py b/tests/test_graph.py
index 7c536b6..1cff02e 100644
--- a/tests/test_graph.py
+++ b/tests/test_graph.py
@@ -5,9 +5,9 @@
 
 
 def test_graph_filtering(provider_factory):
-    graph_provider = provider_factory("w")
+    graph_writer = provider_factory("w")
     roi = Roi((0, 0, 0), (10, 10, 10))
-    graph = graph_provider[roi]
+    graph = graph_writer[roi]
 
     graph.add_node(2, position=(2, 2, 2), selected=True)
     graph.add_node(42, position=(1, 1, 1), selected=False)
@@ -20,26 +20,29 @@ def test_graph_filtering(provider_factory):
     graph.write_nodes()
     graph.write_edges()
 
-    graph_provider = provider_factory("r")
+    graph_reader = provider_factory("r")
 
-    filtered_nodes = graph_provider.read_nodes(roi, attr_filter={"selected": True})
+    filtered_nodes = graph_reader.read_nodes(roi, attr_filter={"selected": True})
     filtered_node_ids = [node["id"] for node in filtered_nodes]
     expected_node_ids = [2, 23, 57]
     assert expected_node_ids == filtered_node_ids
 
-    filtered_edges = graph_provider.read_edges(roi, attr_filter={"selected": True})
+    filtered_edges = graph_reader.read_edges(roi, attr_filter={"selected": True})
     filtered_edge_endpoints = [(edge["u"], edge["v"]) for edge in filtered_edges]
     expected_edge_endpoints = [(57, 23), (2, 42)]
-    assert expected_edge_endpoints == filtered_edge_endpoints
+    for u, v in expected_edge_endpoints:
+        assert (u,v) in filtered_edge_endpoints or (v,u) in filtered_edge_endpoints
 
-    filtered_subgraph = graph_provider.get_graph(
+    filtered_subgraph = graph_reader.get_graph(
         roi, nodes_filter={"selected": True}, edges_filter={"selected": True}
     )
     nodes_with_position = [
         node for node, data in filtered_subgraph.nodes(data=True) if "position" in data
     ]
     assert expected_node_ids == nodes_with_position
-    assert expected_edge_endpoints == filtered_subgraph.edges()
+    assert len(filtered_subgraph.edges()) == len(expected_edge_endpoints)
+    for u, v in expected_edge_endpoints:
+        assert (u,v) in filtered_subgraph.edges() or (v,u) in filtered_subgraph.edges()
 
 
 def test_graph_filtering_complex(provider_factory):
@@ -73,7 +76,8 @@ def test_graph_filtering_complex(provider_factory):
     )
     filtered_edge_endpoints = [(edge["u"], edge["v"]) for edge in filtered_edges]
     expected_edge_endpoints = [(57, 23)]
-    assert expected_edge_endpoints == filtered_edge_endpoints
+    for u, v in expected_edge_endpoints:
+        assert (u,v) in filtered_edge_endpoints or (v,u) in filtered_edge_endpoints
 
     filtered_subgraph = graph_provider.get_graph(
         roi,
@@ -84,7 +88,9 @@ def test_graph_filtering_complex(provider_factory):
         node for node, data in filtered_subgraph.nodes(data=True) if "position" in data
     ]
     assert expected_node_ids == nodes_with_position
-    assert expected_edge_endpoints == filtered_subgraph.edges()
+    assert len(filtered_subgraph.edges()) == len(expected_edge_endpoints)
+    for u, v in expected_edge_endpoints:
+        assert (u,v) in filtered_subgraph.edges() or (v,u) in filtered_subgraph.edges()
 
 
 def test_graph_read_and_update_specific_attrs(provider_factory):