diff --git a/tests/Settings/TestContainerManager.py b/tests/Settings/TestContainerManager.py
index aeb1469c41..f4aa140b6b 100644
--- a/tests/Settings/TestContainerManager.py
+++ b/tests/Settings/TestContainerManager.py
@@ -1,8 +1,12 @@
 from unittest import TestCase
 from unittest.mock import MagicMock
 
-from cura.Settings.ContainerManager import ContainerManager
+from PyQt5.QtCore import QUrl
 
+from UM.MimeTypeDatabase import MimeTypeDatabase
+from cura.Settings.ContainerManager import ContainerManager
+import tempfile
+import os
 
 class TestContainerManager(TestCase):
     def setUp(self):
@@ -13,12 +17,17 @@ class TestContainerManager(TestCase):
 
         self._mocked_mime = MagicMock()
         self._mocked_mime.preferredSuffix = "omg"
+        self._mocked_mime.suffixes = ["omg"]
         self._mocked_mime.comment = "UnitTest!"
 
+        self._mocked_container = MagicMock()
+        self._mocked_container_data = "SOME DATA :D"
+        self._mocked_container.serialize = MagicMock(return_value = self._mocked_container_data)
+
         self._containers_meta_data = [{"id": "test", "test_data": "omg"}]
         self._container_registry.findContainersMetadata = MagicMock(return_value = self._containers_meta_data)
         self._container_registry.getMimeTypeForContainer = MagicMock(return_value = self._mocked_mime)
-
+        self._container_registry.findContainers = MagicMock(return_value = [self._mocked_container])
         self._application.getContainerRegistry = MagicMock(return_value = self._container_registry)
         self._application.getMachineManager = MagicMock(return_value = self._machine_manager)
 
@@ -27,6 +36,10 @@ class TestContainerManager(TestCase):
             ContainerManager._ContainerManager__instance = None
 
         self._container_manager = ContainerManager(self._application)
+        MimeTypeDatabase.addMimeType(self._mocked_mime)
+
+    def tearDown(self):
+        MimeTypeDatabase.removeMimeType(self._mocked_mime)
 
     def test_getContainerMetaDataEntry(self):
         assert self._container_manager.getContainerMetaDataEntry("test", "test_data") == "omg"
@@ -43,3 +56,21 @@ class TestContainerManager(TestCase):
         # Pretend that a new type was added.
         self._container_registry.getContainerTypes = MagicMock(return_value=[("None", None)])
         assert self._container_manager.getContainerNameFilters("") == ['UnitTest! (*.omg)', 'All Files (*)']
+
+    def test_exportContainerUnknownFileType(self):
+        # The filetype is not known, so this should cause an error!
+        assert self._container_manager.exportContainer("test", "zomg", "whatever")["status"] == "error"
+
+    def test_exportContainerInvalidPath(self):
+        assert self._container_manager.exportContainer("test", "zomg", "")["status"] == "error"
+        assert self._container_manager.exportContainer("test", "zomg", QUrl())["status"] == "error"
+
+    def test_exportContainerInvalidId(self):
+        assert self._container_manager.exportContainer("", "whatever", "whatever")["status"] == "error"
+
+    def test_exportContainer(self):
+        with tempfile.TemporaryDirectory() as tmpdirname:
+            result = self._container_manager.exportContainer("test", "whatever", os.path.join(tmpdirname, "whatever.omg"))
+            assert(os.path.exists(result["path"]))
+            with open(result["path"], "r", encoding="utf-8") as f:
+                assert f.read() == self._mocked_container_data