Add more parameters into .opts() Update test_quadmeshplot.py

Add a second parameter into .opts() in test_quadmesh_with_norm to avoid grouped parameters behavior.

Author: JulianGiles

holoviews/tests/plotting/matplotlib/test_quadmeshplot.py

@@ -62,7 +62,7 @@ def test_quadmesh_update_cbar(self):
     def test_quadmesh_with_norm(self):
         arr = np.array([[0, 1, 2], [3, 4, 5]])
 
-        qmesh = hv.QuadMesh(hv.Image(arr)).opts(norm=Normalize())
+        qmesh = hv.QuadMesh(hv.Image(arr)).opts(norm=Normalize(), cmap="viridis")
 
         # Before PR 6889, getting the plot would raise a ValueError from
         # matplotlib because vmin and vmax were passed alongside the norm.