diff --git a/Tests/test_file_spider.py b/Tests/test_file_spider.py
index 9c15de804..d93724492 100644
--- a/Tests/test_file_spider.py
+++ b/Tests/test_file_spider.py
@@ -1,6 +1,7 @@
 from tester import *
 
 from PIL import Image
+from PIL import SpiderImagePlugin
 
 test_file = "Tests/images/lena.spider"
 
@@ -12,4 +13,24 @@ def test_sanity():
     assert_equal(im.size, (128, 128))
     assert_equal(im.format, "SPIDER")
 
+
+def test_save():
+    # Arrange
+    temp = tempfile('temp.spider')
+    im = lena()
+
+    # Act
+    im.save(temp, "SPIDER")
+
+    # Assert
+    im2 = Image.open(temp)
+    assert_equal(im2.mode, "F")
+    assert_equal(im2.size, (128, 128))
+    assert_equal(im2.format, "SPIDER")
+
+
+def test_isSpiderImage():
+    assert_true(SpiderImagePlugin.isSpiderImage(test_file))
+
+
 # End of file