Test_blobservice.py, test_set_blob_properties_with_existing_blob fails on mac.

def test_set_blob_properties_with_existing_blob(self):

Arrange

self._create_container_and_block_blob(self.container_name, 'blob1', 'hello world')

Act

resp = self.bc.set_blob_properties(self.container_name, 'blob1', x_ms_blob_content_language='spanish')

# Assert
self.assertIsNone(resp)
props = self.bc.get_blob_properties(self.container_name, 'blob1')
self.assertEquals(props['Content-Language'], 'spanish')

The reason is that on mac, the props dictionary has a key named 'content-language' in all lowercase, and it's mixed case on windows.