Added missing top-level test code

Tests/test_image.py

@@ -261,8 +261,5 @@ class TestImage(PillowTestCase):
             Image.core.fill('RGB', (2,-2), (0,0,0))
 
 
-
-
-
 if __name__ == '__main__':
     unittest.main()

Tests/test_image_paste.py

@@ -1,4 +1,4 @@
-from helper import PillowTestCase, cached_property
+from helper import unittest, PillowTestCase, cached_property
 
 from PIL import Image
 
@@ -250,3 +250,7 @@ class TestImagingPaste(PillowTestCase):
                 (48, 15, 15, 47),
                 (126, 63, 255, 63)
             ])
+
+
+if __name__ == '__main__':
+    unittest.main()

Tests/test_scipy.py

@@ -1,4 +1,4 @@
-from helper import PillowTestCase
+from helper import unittest, PillowTestCase
 
 try:
     import numpy as np
@@ -41,3 +41,7 @@ class Test_scipy_resize(PillowTestCase):
         assert_equal(im2, res)
         assert_equal(im3, res)
         assert_equal(im4, res)
+
+
+if __name__ == '__main__':
+    unittest.main()

Tests/test_tiff_ifdrational.py

@@ -1,6 +1,6 @@
 from __future__ import print_function
 
-from helper import PillowTestCase, hopper
+from helper import unittest, PillowTestCase, hopper
 
 from PIL import TiffImagePlugin, Image
 from PIL.TiffImagePlugin import IFDRational
@@ -60,3 +60,6 @@ class Test_IFDRational(PillowTestCase):
             reloaded = Image.open(out)
             self.assertEqual(float(IFDRational(301, 1)),
                              float(reloaded.tag_v2[282]))
+
+if __name__ == '__main__':
+    unittest.main()