diff --git a/tests/test_assets.py b/tests/test_assets.py
new file mode 100644
index 0000000..e9fad42
--- /dev/null
+++ b/tests/test_assets.py
@@ -0,0 +1,9 @@
+from grum import assets
+
+
+def test_get_asset():
+    ret = assets.get_asset("testname")
+    assert ret.endswith("grum/grum/assets/testname")
+
+
+
diff --git a/tests/test_plotdesc.py b/tests/test_plotdesc.py
new file mode 100644
index 0000000..06fd68c
--- /dev/null
+++ b/tests/test_plotdesc.py
@@ -0,0 +1,84 @@
+import sys
+import pytest
+from PyQt5.QtWidgets import QApplication
+import pyqtgraph as pg
+
+from grum import theme
+from grum.mainwin import MainWindow
+from grum.mdi.mdisubplot import MDISubPlot
+from grum.plotdesc import PlotDescription
+from grum.theme import pg_plot_style
+
+
+@pytest.mark.parametrize(
+    "plot_name, plot_title, plot_xlabel, plot_ylabel, xs,ys",
+    [
+        ("plot_name", "plot_title", "plot_xlabel", "plot_ylabel", [1, 2], [3, 4]),
+        ("plot_name", None, None, None, [], []),
+    ],
+)
+def test_plot_description_init(
+    plot_name, plot_title, plot_xlabel, plot_ylabel, xs, ys
+):
+    if plot_title:
+        pd = PlotDescription(plot_name, plot_title, plot_xlabel, plot_ylabel, xs, ys)
+    else:
+        pd = PlotDescription(plot_name)
+
+    assert pd.name == plot_name
+    assert pd.title == plot_title
+    assert pd.xlabel == plot_xlabel
+    assert pd.ylabel == plot_ylabel
+    assert pd.xs == xs
+    assert pd.ys == ys
+
+
+def test_data():
+    pd = PlotDescription("name", xs=[1, 2], ys=[3, 4])
+
+    assert pd.data == ([1, 2], [3, 4])
+
+
+def test_append():
+    pd = PlotDescription("name", xs=[1, 2], ys=[3, 4])
+    pd.append([3, 5])
+
+    assert pd.xs == [1, 2, 3]
+    assert pd.ys == [3, 4, 5]
+
+
+def test_make_plot():
+    pd = PlotDescription(
+        "plot_name", "plot_title", "plot_xlabel", "plot_ylabel", [1, 2], [3, 4]
+    )
+    app = QApplication(sys.argv)
+    theme.apply(app)
+    mw = MainWindow(add_examples=True)
+
+    mdi_sub = MDISubPlot("mdi", pd)
+    pw = pg.PlotWidget()
+    style = pg_plot_style()
+
+    ret = pd.make_plot(pw, style)
+
+    assert isinstance(ret, pg.PlotDataItem)
+    assert pw.getAxis("left").labelText == "plot_ylabel"
+    assert pw.getAxis("bottom").labelText == "plot_xlabel"
+    assert pw.getPlotItem().titleLabel.text == "plot_title"
+
+
+def test_to_dict():
+    pd = PlotDescription(
+        "plot_name", "plot_title", "plot_xlabel", "plot_ylabel", [1, 2], [3, 4]
+    )
+
+    assert pd.to_dict() == {
+        "title": "plot_title",
+        "xlabel": "plot_xlabel",
+        "xs": [1, 2],
+        "ylabel": "plot_ylabel",
+        "ys": [3, 4],
+    }
+
+
+