diff --git a/mayavi/filters/threshold.py b/mayavi/filters/threshold.py
index b9329e7c1..4c648297a 100644
--- a/mayavi/filters/threshold.py
+++ b/mayavi/filters/threshold.py
@@ -14,6 +14,7 @@
                                  Property, Enum
 from traitsui.api import View, Group, Item
 from tvtk.api import tvtk
+from tvtk.common import vtk_major_version, vtk_minor_version
 
 # Local imports
 from mayavi.core.filter import Filter
@@ -165,13 +166,19 @@ def update_data(self):
     ######################################################################
     def _lower_threshold_changed(self, new_value):
         fil = self.threshold_filter
-        fil.threshold_between(new_value, self.upper_threshold)
+        if (vtk_major_version, vtk_minor_version) >= (9, 1):
+            fil.lower_threshold = new_value
+        else:
+            fil.threshold_between(new_value, self.upper_threshold)
         fil.update()
         self.data_changed = True
 
     def _upper_threshold_changed(self, new_value):
         fil = self.threshold_filter
-        fil.threshold_between(self.lower_threshold, new_value)
+        if (vtk_major_version, vtk_minor_version) >= (9, 1):
+            fil.upper_threshold = new_value
+        else:
+            fil.threshold_between(self.lower_threshold, new_value)
         fil.update()
         self.data_changed = True
 
@@ -270,8 +277,12 @@ def _threshold_filter_changed(self, old, new):
             return
         fil = new
         self.configure_connection(fil, self.inputs[0].outputs[0])
-        fil.threshold_between(self.lower_threshold,
-                              self.upper_threshold)
+        if (vtk_major_version, vtk_minor_version) >= (9, 1):
+            fil.lower_threshold = self.lower_threshold
+            fil.upper_threshold = self.upper_threshold
+        else:
+            fil.threshold_between(self.lower_threshold,
+                                  self.upper_threshold)
         fil.update()
         self._set_outputs([fil])
 
diff --git a/mayavi/tests/test_set_active_attribute.py b/mayavi/tests/test_set_active_attribute.py
index d46357c7f..7b01dee65 100644
--- a/mayavi/tests/test_set_active_attribute.py
+++ b/mayavi/tests/test_set_active_attribute.py
@@ -64,8 +64,8 @@ def check(self):
         c = src.children[1]
         sc = get_output(c.outputs[0]).point_data.scalars
         self.assertEqual(sc.name,'temperature')
-        # It is an iso-contour!
-        self.assertEqual(sc.range[0],sc.range[1])
+        # It is an iso-contour! Allow rounding differences
+        self.assertAlmostEqual(sc.range[0], sc.range[1], places=5)
         aa = c.children[0].children[0]
         self.assertEqual(aa.point_scalars_name,'pressure')
         sc = get_output(aa.outputs[0]).point_data.scalars
diff --git a/tvtk/common.py b/tvtk/common.py
index b5413583b..e79f8de17 100644
--- a/tvtk/common.py
+++ b/tvtk/common.py
@@ -10,6 +10,7 @@
 import vtk
 
 vtk_major_version = vtk.vtkVersion.GetVTKMajorVersion()
+vtk_minor_version = vtk.vtkVersion.GetVTKMinorVersion()
 
 
 ######################################################################
diff --git a/tvtk/tests/test_vtk_parser.py b/tvtk/tests/test_vtk_parser.py
index ceab86b7e..c97635f58 100644
--- a/tvtk/tests/test_vtk_parser.py
+++ b/tvtk/tests/test_vtk_parser.py
@@ -127,7 +127,7 @@ def test_parse(self):
             res['NormalScale'] = (1., None)
             res['OcclusionStrength'] = (1., float_max)
             res['Roughness'] = (0.5, float_max)
-        if vtk_major_version >= 9 and vtk_minor_version > 0:
+        if (vtk_major_version, vtk_minor_version) >= (9, 1):
             res['Anisotropy'] = (0.0, (0.0, 1.0))
             res['AnisotropyRotation'] = (0.0, (0.0, 1.0))
             res['BaseIOR'] = (1.5, (1.0, 9.999999680285692e+37))
@@ -140,6 +140,8 @@ def test_parse(self):
             res['SelectionColor'] = ((1.0, 0.0, 0.0, 1.0), None)
             res['SelectionLineWidth'] = (2.0, None)
             res['SelectionPointSize'] = (2.0, None)
+        if (vtk_major_version, vtk_minor_version) >= (9, 3):
+            res['EdgeOpacity'] = (1.0, None)
 
         result = list(p.get_get_set_methods().keys())
         if hasattr(obj, 'GetTexture'):