mv test to tests

skimage/rank/setup.py

@@ -12,4 +12,7 @@ setup(
                     Extension("crank16", ["crank16.pyx"], include_dirs=[np.get_include()]),
                     Extension("crank16_bilateral", ["crank16_bilateral.pyx"], include_dirs=[np.get_include()]),
                     Extension("crank16_percentiles", ["crank16_percentiles.pyx"], include_dirs=[np.get_include()])]
-)
+)
+
+
+