diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 9abdd2cb96..1039085cf3 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -309,7 +309,7 @@ class MachineManager(QObject):
 
         # Update materials to make sure that the diameters match with the machine's
         for position in global_stack.extruders:
-            self._updateMaterialWithVariant(position)
+            self.updateMaterialWithVariant(position)
 
         global_quality = global_stack.quality
         quality_type = global_quality.getMetaDataEntry("quality_type")
@@ -1205,7 +1205,7 @@ class MachineManager(QObject):
                    current_quality_type, quality_type)
         self._setQualityGroup(candidate_quality_groups[quality_type], empty_quality_changes = True)
 
-    def _updateMaterialWithVariant(self, position: Optional[str]):
+    def updateMaterialWithVariant(self, position: Optional[str]):
         if self._global_container_stack is None:
             return
         if position is None:
@@ -1291,7 +1291,7 @@ class MachineManager(QObject):
                     self._setMaterial(position, material_container_node)
                 else:
                     self._global_container_stack.extruders[position].material = self._empty_material_container
-                self._updateMaterialWithVariant(position)
+                self.updateMaterialWithVariant(position)
 
             if configuration.buildplateConfiguration is not None:
                 global_variant_container_node = self._variant_manager.getBuildplateVariantNode(self._global_container_stack.definition.getId(), configuration.buildplateConfiguration)
@@ -1337,7 +1337,7 @@ class MachineManager(QObject):
         self.blurSettings.emit()
         with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
             self._setGlobalVariant(container_node)
-            self._updateMaterialWithVariant(None)  # Update all materials
+            self.updateMaterialWithVariant(None)  # Update all materials
             self._updateQualityWithMaterial()
 
     @pyqtSlot(str, str)
@@ -1374,7 +1374,7 @@ class MachineManager(QObject):
         self.blurSettings.emit()
         with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
             self._setVariantNode(position, container_node)
-            self._updateMaterialWithVariant(position)
+            self.updateMaterialWithVariant(position)
             self._updateQualityWithMaterial()
 
         # See if we need to show the Discard or Keep changes screen
@@ -1438,5 +1438,5 @@ class MachineManager(QObject):
         if self._global_container_stack is None:
             return
         with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
-            self._updateMaterialWithVariant(None)
+            self.updateMaterialWithVariant(None)
             self._updateQualityWithMaterial()
diff --git a/plugins/MachineSettingsAction/MachineSettingsAction.py b/plugins/MachineSettingsAction/MachineSettingsAction.py
index 974ecf4b02..0f8e0fa1ca 100755
--- a/plugins/MachineSettingsAction/MachineSettingsAction.py
+++ b/plugins/MachineSettingsAction/MachineSettingsAction.py
@@ -158,4 +158,4 @@ class MachineSettingsAction(MachineAction):
     @pyqtSlot(int)
     def updateMaterialForDiameter(self, extruder_position: int):
         # Updates the material container to a material that matches the material diameter set for the printer
-        self._application.getMachineManager()._updateMaterialWithVariant(extruder_position)
+        self._application.getMachineManager().updateMaterialWithVariant(extruder_position)