diff --git a/tests/Settings/TestCuraContainerRegistry.py b/tests/Settings/TestCuraContainerRegistry.py
index 97897fcd6d..89eba7b502 100644
--- a/tests/Settings/TestCuraContainerRegistry.py
+++ b/tests/Settings/TestCuraContainerRegistry.py
@@ -3,6 +3,7 @@
 
 import os #To find the directory with test files and find the test files.
 import pytest #This module contains unit tests.
+import shutil #To copy files to make a temporary file.
 import unittest.mock #To mock and monkeypatch stuff.
 
 from cura.Settings.CuraContainerRegistry import CuraContainerRegistry #The class we're testing.
@@ -48,4 +49,25 @@ def test_loadTypes(filename, output_class, container_registry):
             assert type(container) == output_class
             break
     else:
-        assert False #Container stack with specified ID was not loaded.
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+        assert False #Container stack with specified ID was not loaded.
+
+##  Tests whether loading a legacy file moves the upgraded file properly.
+def test_loadLegacyFileRenamed(container_registry):
+    #Create a temporary file for the registry to load.
+    temp_file = os.path.join(os.path.dirname(os.path.abspath(__file__)), "stacks", "temporary.stack.cfg")
+    temp_file_source = os.path.join(os.path.dirname(os.path.abspath(__file__)), "stacks", "MachineLegacy.stack.cfg")
+    shutil.copyfile(temp_file_source, temp_file)
+
+    #Mock some dependencies.
+    UM.Settings.ContainerStack.setContainerRegistry(container_registry)
+    Resources.getAllResourcesOfType = unittest.mock.MagicMock(return_value = [temp_file]) #Return a temporary file that we'll make for this test.
+    def findContainers(id, container_type = 0):
+        return [UM.Settings.ContainerRegistry._EmptyInstanceContainer(id)]
+    container_registry.findContainers = findContainers
+
+    with unittest.mock.patch("cura.Settings.GlobalStack.GlobalStack.findContainer"):
+        container_registry.load()
+
+    assert not os.path.isfile(temp_file)
+    new_filename = os.path.splitext(os.path.splitext(temp_file)[0])[0] + ".global.cfg"
+    assert os.path.isfile(new_filename)
\ No newline at end of file