diff --git a/tests/Settings/TestGlobalStack.py b/tests/Settings/TestGlobalStack.py
index 84d1de01b4..e0ce800eca 100644
--- a/tests/Settings/TestGlobalStack.py
+++ b/tests/Settings/TestGlobalStack.py
@@ -143,4 +143,25 @@ def test_deserializeVariant(filename, variant_id, container_registry):
 
     stack.deserialize(serialized)
 
-    assert stack.variant.getId() == variant_id
\ No newline at end of file
+    assert stack.variant.getId() == variant_id
+
+##  Tests whether the definition changes profile is being read properly from a
+#   global stack.
+@pytest.mark.parametrize("filename,                          definition_changes_id", [
+                        ("Global.global.cfg",                "empty"),
+                        ("Global.stack.cfg",                 "empty"),
+                        ("MachineLegacy.stack.cfg",          "empty"),
+                        ("OnlyDefinitionChanges.global.cfg", "some_instance"),
+                        ("Complete.global.cfg",              "some_material")
+])
+def test_deserializeDefinitionChanges(filename, definition_changes_id, container_registry):
+    serialized = readStack(filename)
+    stack = cura.Settings.GlobalStack.GlobalStack("TestStack")
+
+    #Mock the loading of the instance containers.
+    stack.findContainer = findSomeContainers
+    UM.Settings.ContainerStack._containerRegistry = container_registry #Always has all the profiles you ask of.
+
+    stack.deserialize(serialized)
+
+    assert stack.variant.getId() == definition_changes_id
\ No newline at end of file
diff --git a/tests/Settings/stacks/OnlyDefinitionChanges.global.cfg b/tests/Settings/stacks/OnlyDefinitionChanges.global.cfg
new file mode 100644
index 0000000000..39e2105b7d
--- /dev/null
+++ b/tests/Settings/stacks/OnlyDefinitionChanges.global.cfg
@@ -0,0 +1,8 @@
+[general]
+version = 3
+name = Only Definition Changes
+id = OnlyDefinitionChanges
+
+[containers]
+5 = some_instance
+6 = some_definition