Parameters to significantly_different.py need to be parsed as lists.

scripts/slave/recipe_modules/auto_bisect/resources/significantly_different_test.py

Index: scripts/slave/recipe_modules/auto_bisect/resources/significantly_different_test.py
diff --git a/scripts/slave/recipe_modules/auto_bisect/resources/significantly_different_test.py b/scripts/slave/recipe_modules/auto_bisect/resources/significantly_different_test.py
index 2c8da3cc0c4404c9f442299ebf5a79b39449428e..346c90f2d1c10591a575c15dba0a40644c723583 100755
--- a/scripts/slave/recipe_modules/auto_bisect/resources/significantly_different_test.py
+++ b/scripts/slave/recipe_modules/auto_bisect/resources/significantly_different_test.py
@@ -34,5 +34,17 @@ class SignificantlyDifferentTest(unittest.TestCase):
         0.40073980338363635,
         results['mann_p_value'])
 
+  def test_single_value(self):
+    try:
+      results = significantly_different.main(
+          ['', '[1, 1, 1, 1, 1, 1]', '[1, 1, 1]', '0.05'],
+          self.conda_path)
+      self.assertIsNone(results['mann_p_value'])
+      self.assertFalse(results['significantly_different'])
+    except significantly_different.ScipyNotInstalledError:
+      # This is meant to let presubmit pass on CQ bots :( because they don't
+      # have scipy either directly or thorugh anaconda.
+      return
+
 if __name__ == '__main__':
   unittest.main()