diff --git a/tests/Settings/TestCuraContainerRegistry.py b/tests/Settings/TestCuraContainerRegistry.py
index 48b141886b..3ae6c8cca7 100644
--- a/tests/Settings/TestCuraContainerRegistry.py
+++ b/tests/Settings/TestCuraContainerRegistry.py
@@ -31,7 +31,7 @@ def test_loadTypes(filename, output_class, container_registry):
     UM.Settings.ContainerStack.setContainerRegistry(container_registry)
     Resources.getAllResourcesOfType = unittest.mock.MagicMock(return_value = [os.path.join(os.path.dirname(os.path.abspath(__file__)), "stacks", filename)]) #Return just this tested file.
     def findContainers(id, container_type = 0):
-        if id == "some_material" or id == "some_definition":
+        if id == "some_instance" or id == "some_definition":
             return [UM.Settings.ContainerRegistry._EmptyInstanceContainer(id)]
         else:
             return []
diff --git a/tests/Settings/TestGlobalStack.py b/tests/Settings/TestGlobalStack.py
index d808edd6f1..277ae4bd43 100644
--- a/tests/Settings/TestGlobalStack.py
+++ b/tests/Settings/TestGlobalStack.py
@@ -22,7 +22,7 @@ def test_deserializeUserChanges(filename, user_changes_id):
 
     #Mock the loading of the instances.
     def findContainer(container_id = "*", container_type = None, type = None, category = "*"):
-        if id == "some_material":
+        if id == "some_instance":
             return UM.Settings.ContainerRegistry._EmptyInstanceContainer(id)
         if container_type == DefinitionContainer:
             return unittest.mock.MagicMock()
diff --git a/tests/Settings/stacks/ExtruderLegacy.stack.cfg b/tests/Settings/stacks/ExtruderLegacy.stack.cfg
index 91d5a79b49..e2cdd1c08c 100644
--- a/tests/Settings/stacks/ExtruderLegacy.stack.cfg
+++ b/tests/Settings/stacks/ExtruderLegacy.stack.cfg
@@ -7,5 +7,5 @@ id = ExtruderLegacy
 type = extruder
 
 [containers]
-3 = some_material
+3 = some_instance
 6 = some_definition
diff --git a/tests/Settings/stacks/Global.global.cfg b/tests/Settings/stacks/Global.global.cfg
index 11ad8fa656..9034c1d0d0 100644
--- a/tests/Settings/stacks/Global.global.cfg
+++ b/tests/Settings/stacks/Global.global.cfg
@@ -4,5 +4,5 @@ name = Global
 id = Global
 
 [containers]
-3 = some_material
+3 = some_instance
 6 = some_definition
diff --git a/tests/Settings/stacks/Global.stack.cfg b/tests/Settings/stacks/Global.stack.cfg
index 11ad8fa656..9034c1d0d0 100644
--- a/tests/Settings/stacks/Global.stack.cfg
+++ b/tests/Settings/stacks/Global.stack.cfg
@@ -4,5 +4,5 @@ name = Global
 id = Global
 
 [containers]
-3 = some_material
+3 = some_instance
 6 = some_definition
diff --git a/tests/Settings/stacks/Left.extruder.cfg b/tests/Settings/stacks/Left.extruder.cfg
index 3abe869a0e..fcc9500659 100644
--- a/tests/Settings/stacks/Left.extruder.cfg
+++ b/tests/Settings/stacks/Left.extruder.cfg
@@ -4,5 +4,5 @@ name = Left
 id = Left
 
 [containers]
-3 = some_material
+3 = some_instance
 6 = some_definition
diff --git a/tests/Settings/stacks/MachineLegacy.stack.cfg b/tests/Settings/stacks/MachineLegacy.stack.cfg
index 0f2e77a82e..147d63c596 100644
--- a/tests/Settings/stacks/MachineLegacy.stack.cfg
+++ b/tests/Settings/stacks/MachineLegacy.stack.cfg
@@ -7,5 +7,5 @@ id = MachineLegacy
 type = machine
 
 [containers]
-3 = some_material
+3 = some_instance
 6 = some_definition
\ No newline at end of file