diff --git a/skimage/color/tests/test_delta_e.py b/skimage/color/tests/test_delta_e.py
index 1bfcc4d0..4535a311 100644
--- a/skimage/color/tests/test_delta_e.py
+++ b/skimage/color/tests/test_delta_e.py
@@ -136,3 +136,8 @@ def test_cmc():
     ])
 
     assert_allclose(dE2, oracle, rtol=1.e-8)
+
+
+if __name__ == "__main__":
+    from numpy.testing import run_module_suite
+    run_module_suite()