diff --git a/library/tests/test_dimensions.py b/library/tests/test_dimensions.py
index 2521469..1139291 100644
--- a/library/tests/test_dimensions.py
+++ b/library/tests/test_dimensions.py
@@ -4,8 +4,16 @@ def test_240_240(GPIO, spidev):
     assert display.width == 240
     assert display.height == 240
 
+
 def test_240_135(GPIO, spidev):
     import ST7789
     display = ST7789.ST7789(port=0, cs=0, dc=24, width=240, height=135, rotation=0)
     assert display.width == 240
     assert display.height == 135
+
+
+def test_320_240(GPIO, spidev):
+    import ST7789
+    display = ST7789.ST7789(port=0, cs=0, dc=24, width=320, height=240, rotation=0)
+    assert display.width == 320
+    assert display.height == 240
diff --git a/library/tests/test_setup.py b/library/tests/test_setup.py
index 41a8e61..0cde59b 100644
--- a/library/tests/test_setup.py
+++ b/library/tests/test_setup.py
@@ -1,4 +1,20 @@
+import pytest
+
 def test_setup(GPIO, spidev):
     import ST7789
     display = ST7789.ST7789(port=0, cs=0, dc=24)
     del display
+
+
+def test_unsupported_rotation_320_x_240_90(GPIO, spidev):
+    import ST7789
+    with pytest.raises(RuntimeError):
+        display = ST7789.ST7789(port=0, cs=0, dc=24, width=320, height=240, rotation=90)
+        del display
+
+
+def test_unsupported_rotation_320_x_240_270(GPIO, spidev):
+    import ST7789
+    with pytest.raises(RuntimeError):
+        display = ST7789.ST7789(port=0, cs=0, dc=24, width=320, height=240, rotation=270)
+        del display
\ No newline at end of file