diff --git a/tests/Settings/TestCuraContainerRegistry.py b/tests/Settings/TestCuraContainerRegistry.py
old mode 100644
new mode 100755
index 31348753f4..f6c1eeb9a5
--- a/tests/Settings/TestCuraContainerRegistry.py
+++ b/tests/Settings/TestCuraContainerRegistry.py
@@ -75,4 +75,4 @@ def test_loadLegacyFileRenamed(container_registry):
 
     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
+    assert os.path.isfile(new_filename)
diff --git a/tests/Settings/TestGlobalStack.py b/tests/Settings/TestGlobalStack.py
old mode 100644
new mode 100755
index c8f4d5dfaf..539de4929e
--- a/tests/Settings/TestGlobalStack.py
+++ b/tests/Settings/TestGlobalStack.py
@@ -544,3 +544,15 @@ def test_setVariantByIdExists(global_stack, container_registry):
 def test_setVariantByIdDoesntExist(global_stack):
     with pytest.raises(InvalidContainerError):
         global_stack.setVariantById("some_variant") #Container registry is empty now.
+
+##  Smoke test for findDefaultVariant
+def test_smoke_findDefaultVariant(global_stack):
+    global_stack.findDefaultVariant()
+
+##  Smoke test for findDefaultMaterial
+def test_smoke_findDefaultMaterial(global_stack):
+    global_stack.findDefaultMaterial()
+
+##  Smoke test for findDefaultQuality
+def test_smoke_findDefaultQuality(global_stack):
+    global_stack.findDefaultQuality()