diff --git a/Tests/test_image_getdominantcolors.py b/Tests/test_image_getdominantcolors.py
new file mode 100644
index 000000000..c6c734bb7
--- /dev/null
+++ b/Tests/test_image_getdominantcolors.py
@@ -0,0 +1,22 @@
+from .helper import hopper
+
+
+def test_getdominantcolors():
+    def getdominantcolors(mode, numcolors=None):
+        im = hopper(mode)
+
+        if numcolors:
+            colors = im.getdominantcolors(numcolors)
+        else:
+            colors = im.getdominantcolors()
+        return len(colors)
+
+    assert getdominantcolors("F") == 3
+    assert getdominantcolors("I") == 3
+    assert getdominantcolors("L") == 3
+    assert getdominantcolors("P") == 3
+    assert getdominantcolors("RGB") == 3
+    assert getdominantcolors("YCbCr") == 3
+    assert getdominantcolors("CMYK") == 3
+    assert getdominantcolors("RGBA") == 3
+    assert getdominantcolors("HSV") == 3