diff --git a/networkx/drawing/tests/test_layout.py b/networkx/drawing/tests/test_layout.py
index a858570a2c04..6bba0defdfbc 100644
--- a/networkx/drawing/tests/test_layout.py
+++ b/networkx/drawing/tests/test_layout.py
@@ -307,12 +307,10 @@ def test_arc_layout(self):
         sizes = (0, 5, 7, 2, 8)
         G = nx.complete_multipartite_graph(*sizes)
 
-        vpos = nx.arc_layout(G)
+        vpos = nx.arc_layout(G, subset_key="subset")
         assert len(vpos) == len(G)
 
-        pytest.raises(
-            ValueError, nx.multipartite_layout, G, radius="non-sensible input"
-        )
+        pytest.raises(TypeError, nx.multipartite_layout, G, radius="non-sensible input")
 
     def test_kamada_kawai_costfn_1d(self):
         costfn = nx.drawing.layout._kamada_kawai_costfn
@@ -461,7 +459,7 @@ def test_multipartite_layout_nonnumeric_partition_labels():
 
 def test_arc_layout_nonnumeric_paratition_labels():
     """see gh-5123."""
-    g = nx.graph()
+    g = nx.Graph()
     g.add_node(0, subset="s0")
     g.add_node(1, subset="s0")
     g.add_node(2, subset="s1")