diff --git a/e2xgrader/tests/server_extensions/apps/diagram_editor/test_diagrameditor.py b/e2xgrader/tests/server_extensions/apps/diagram_editor/test_diagrameditor.py
new file mode 100644
index 00000000..15d7cd09
--- /dev/null
+++ b/e2xgrader/tests/server_extensions/apps/diagram_editor/test_diagrameditor.py
@@ -0,0 +1,48 @@
+import unittest
+
+from traitlets.config import LoggingConfigurable
+
+from e2xgrader.server_extensions.apps.diagram_editor import DiagramEditor
+
+
+class DummyWebApp:
+    @property
+    def settings(self):
+        return dict()
+
+
+class DummyApp(LoggingConfigurable):
+    root_dir = "dummy"
+    name = "dummy"
+
+    @property
+    def web_app(self):
+        return DummyWebApp()
+
+
+class TestDiagramEditor(unittest.TestCase):
+    def setUp(self) -> None:
+        self.editor = DiagramEditor(parent=DummyApp())
+
+    def test_empty_config(self):
+        self.assertDictEqual(self.editor.get_diagram_config(), dict())
+
+    def test_configure_draw_domain(self):
+        domain = "myDomain"
+        self.editor.drawDomain = domain
+        self.assertDictEqual(self.editor.get_diagram_config(), dict(drawDomain=domain))
+
+    def test_configure_draw_origin(self):
+        domain = "myDomain"
+        self.editor.drawOrigin = domain
+        self.assertDictEqual(self.editor.get_diagram_config(), dict(drawOrigin=domain))
+
+    def test_configure_libraries(self):
+        libraries = ["lib1", "lib2", "lib3"]
+        self.editor.libraries = libraries
+        self.assertDictEqual(self.editor.get_diagram_config(), dict(libs=libraries))
+
+    def tearDown(self) -> None:
+        self.editor.drawDomain = None
+        self.editor.drawOrigin = None
+        self.editor.libraries = []