diff --git a/Tests/test_file_spider.py b/Tests/test_file_spider.py
index 622bfd624..65e4d2782 100644
--- a/Tests/test_file_spider.py
+++ b/Tests/test_file_spider.py
@@ -3,13 +3,13 @@ from helper import unittest, PillowTestCase, lena
 from PIL import Image
 from PIL import SpiderImagePlugin
 
-test_file = "Tests/images/lena.spider"
+TEST_FILE = "Tests/images/lena.spider"
 
 
 class TestImageSpider(PillowTestCase):
 
     def test_sanity(self):
-        im = Image.open(test_file)
+        im = Image.open(TEST_FILE)
         im.load()
         self.assertEqual(im.mode, "F")
         self.assertEqual(im.size, (128, 128))
@@ -30,7 +30,50 @@ class TestImageSpider(PillowTestCase):
         self.assertEqual(im2.format, "SPIDER")
 
     def test_isSpiderImage(self):
-        self.assertTrue(SpiderImagePlugin.isSpiderImage(test_file))
+        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))
+
+    def test_tell(self):
+        # Arrange
+        im = Image.open(TEST_FILE)
+
+        # Act
+        index = im.tell()
+
+        # Assert
+        self.assertEqual(index, 0)
+
+    def test_loadImageSeries(self):
+        # Arrange
+        not_spider_file = "Tests/images/lena.ppm"
+        file_list = [TEST_FILE, not_spider_file, "path/not_found.ext"]
+
+        # Act
+        img_list = SpiderImagePlugin.loadImageSeries(file_list)
+
+        # Assert
+        self.assertEqual(len(img_list), 1)
+        self.assertIsInstance(img_list[0], Image.Image)
+        self.assertEqual(img_list[0].size, (128, 128))
+
+    def test_loadImageSeries_no_input(self):
+        # Arrange
+        file_list = None
+
+        # Act
+        img_list = SpiderImagePlugin.loadImageSeries(file_list)
+
+        # Assert
+        self.assertEqual(img_list, None)
+
+    def test_isInt_not_a_number(self):
+        # Arrange
+        not_a_number = "a"
+
+        # Act
+        ret = SpiderImagePlugin.isInt(not_a_number)
+
+        # Assert
+        self.assertEqual(ret, 0)
 
 
 if __name__ == '__main__':