diff --git a/tests/Machines/TestMachineNode.py b/tests/Machines/TestMachineNode.py
index 347059adb9..8a343c4fe8 100644
--- a/tests/Machines/TestMachineNode.py
+++ b/tests/Machines/TestMachineNode.py
@@ -23,6 +23,18 @@ def container_registry():
     result.findContainersMetadata = MagicMock(return_value = [metadata_dict])
     return result
 
+##  Creates a machine node without anything underneath it. No sub-nodes.
+#
+#   For testing stuff with machine nodes without testing _loadAll(). You'll need
+#   to add subnodes manually in your test.
+@pytest.fixture
+def empty_machine_node():
+    empty_container_registry = MagicMock()
+    empty_container_registry.findContainersMetadata = MagicMock(return_value = [metadata_dict])  # Still contain the MachineNode's own metadata for the constructor.
+    empty_container_registry.findInstanceContainersMetadata = MagicMock(return_value = [])
+    with patch("UM.Settings.ContainerRegistry.ContainerRegistry.getInstance", MagicMock(return_value = empty_container_registry)):
+        with patch("cura.Machines.MachineNode.MachineNode._loadAll", MagicMock()):
+            return MachineNode("machine_1")
 
 def getMetadataEntrySideEffect(*args, **kwargs):
     return metadata_dict.get(args[0])
@@ -64,19 +76,11 @@ def test_metadataProperties(container_registry):
 
 ##  Test getting quality groups when there are quality profiles available for
 #   the requested configurations on two extruders.
-def test_getQualityGroupsBothExtrudersAvailable():
-    # Create a machine node without constructing the tree beneath it. We don't want to depend on that for this test.
-    empty_container_registry = MagicMock()
-    empty_container_registry.findContainersMetadata = MagicMock(return_value = [metadata_dict])  # Still contain the MachineNode's own metadata for the constructor.
-    empty_container_registry.findInstanceContainersMetadata = MagicMock(return_value = [])
-    with patch("UM.Settings.ContainerRegistry.ContainerRegistry.getInstance", MagicMock(return_value = empty_container_registry)):
-        with patch("cura.Machines.MachineNode.MachineNode._loadAll", MagicMock()):
-            machine_node = MachineNode("machine_1")
-
+def test_getQualityGroupsBothExtrudersAvailable(empty_machine_node):
     # Prepare a tree inside the machine node.
     extruder_0_node = MagicMock(quality_type = "quality_type_1")
     extruder_1_node = MagicMock(quality_type = "quality_type_1")  # Same quality type, so this is the one that can be returned.
-    machine_node.variants = {
+    empty_machine_node.variants = {
         "variant_1": MagicMock(
             materials = {
                 "material_1": MagicMock(
@@ -100,16 +104,68 @@ def test_getQualityGroupsBothExtrudersAvailable():
         container = MagicMock(id = "global_quality_container"),  # Needs to exist, otherwise it won't add this quality type.
         getMetaDataEntry = lambda _, __: "Global Quality Profile Name"
     )
-    machine_node.global_qualities = {
+    empty_machine_node.global_qualities = {
         "quality_type_1": global_node
     }
 
     # Request the quality groups for the variants in the machine tree.
-    result = machine_node.getQualityGroups(["variant_1", "variant_2"], ["material_1", "material_2"], [True, True])
+    result = empty_machine_node.getQualityGroups(["variant_1", "variant_2"], ["material_1", "material_2"], [True, True])
 
     assert "quality_type_1" in result, "This quality type was available for both extruders."
     assert result["quality_type_1"].node_for_global == global_node
     assert result["quality_type_1"].nodes_for_extruders[0] == extruder_0_node
     assert result["quality_type_1"].nodes_for_extruders[1] == extruder_1_node
     assert result["quality_type_1"].name == global_node.getMetaDataEntry("name", "Unnamed Profile")
-    assert result["quality_type_1"].quality_type == "quality_type_1"
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+    assert result["quality_type_1"].quality_type == "quality_type_1"
+
+##  Test the "is_available" flag on quality groups.
+#
+#   If a profile is available for a quality type on an extruder but not on all
+#   extruders, there should be a quality group for it but it should not be made
+#   available.
+def test_getQualityGroupsAvailability(empty_machine_node):
+    # Prepare a tree inside the machine node.
+    extruder_0_both = MagicMock(quality_type = "quality_type_both")  # This quality type is available for both extruders.
+    extruder_1_both = MagicMock(quality_type = "quality_type_both")
+    extruder_0_exclusive = MagicMock(quality_type = "quality_type_0")  # These quality types are only available on one of the extruders.
+    extruder_1_exclusive = MagicMock(quality_type = "quality_type_1")
+    empty_machine_node.variants = {
+        "variant_1": MagicMock(
+            materials = {
+                "material_1": MagicMock(
+                    qualities = {
+                        "quality_0_both": extruder_0_both,
+                        "quality_0_exclusive": extruder_0_exclusive
+                    }
+                )
+            }
+        ),
+        "variant_2": MagicMock(
+            materials = {
+                "material_2": MagicMock(
+                    qualities = {
+                        "quality_1_both": extruder_1_both,
+                        "quality_1_exclusive": extruder_1_exclusive
+                    }
+                )
+            }
+        )
+    }
+    global_both = MagicMock(container = MagicMock(id = "global_quality_both"), getMetaDataEntry = lambda _, __: "Global Quality Both")
+    global_0 = MagicMock(container = MagicMock(id = "global_quality_0"), getMetaDataEntry = lambda _, __: "Global Quality 0 Exclusive")
+    global_1 = MagicMock(container = MagicMock(id = "global_quality_1"), getMetaDataEntry = lambda _, __: "Global Quality 1 Exclusive")
+    empty_machine_node.global_qualities = {
+        "quality_type_both": global_both,
+        "quality_type_0": global_0,
+        "quality_type_1": global_1
+    }
+
+    # Request the quality groups for the variants in the machine tree.
+    result = empty_machine_node.getQualityGroups(["variant_1", "variant_2"], ["material_1", "material_2"], [True, True])
+
+    assert "quality_type_both" in result, "This quality type was available on both extruders."
+    assert result["quality_type_both"].is_available, "This quality type was available on both extruders and thus should be made available."
+    assert "quality_type_0" in result, "This quality type was available for one of the extruders, and so there must be a group for it (even though it's unavailable)."
+    assert not result["quality_type_0"].is_available, "This quality type was only available for one of the extruders and thus can't be activated."
+    assert "quality_type_1" in result, "This quality type was available for one of the extruders, and so there must be a group for it (even though it's unavailable)."
+    assert not result["quality_type_1"].is_available, "This quality type was only available for one of the extruders and thus can't be activated."
\ No newline at end of file