diff --git a/Orange/widgets/visualize/tests/test_owscatterplot.py b/Orange/widgets/visualize/tests/test_owscatterplot.py
new file mode 100644
index 00000000000..be179b6e006
--- /dev/null
+++ b/Orange/widgets/visualize/tests/test_owscatterplot.py
@@ -0,0 +1,35 @@
+import numpy as np
+
+from Orange.data import Table
+from Orange.widgets.tests.base import GuiTest
+from Orange.widgets.visualize.owscatterplot import OWScatterPlot
+
+
+class TestOWScatterPlot(GuiTest):
+    def setUp(self):
+        self.widget = self.create_widget(OWScatterPlot)
+        self.data = Table("iris")
+
+    def tearDown(self):
+        self.widget.onDeleteWidget()
+
+    def test_set_data(self):
+        self.widget.set_data(self.data)
+        self.assertEqual(self.widget.data, self.data)
+        self.assertEqual(self.widget.subset_data, None)
+
+    def test_subset_data(self):
+        self.widget.set_subset_data(self.data[:30])
+        self.assertEqual(len(self.widget.subset_data), 30)
+        self.assertEqual(self.widget.data, None)
+        np.testing.assert_array_equal(self.widget.subset_data, self.data[:30])
+
+    def test_set_data_none(self):
+        self.widget.set_data(None)
+        self.assertEqual(self.widget.data, None)
+        self.assertEqual(self.widget.subset_data, None)
+
+    def test_subset_data_none(self):
+        self.widget.set_subset_data(None)
+        self.assertEqual(self.widget.subset_data, None)
+        self.assertEqual(self.widget.data, None)