diff --git a/tests/test_predict.py b/tests/test_predict.py
--- a/tests/test_predict.py
+++ b/tests/test_predict.py
@@ -55,6 +55,23 @@ class TestSample(TestCase):
 		self.assertEqual(c.language, "??")
 		self.assertEqual(c.ranked_ngrams, {'a': 0, ' a': 1, 'a ': 2, 'aa': 3, ' aa': 4, 'aa ': 5})
 
+	def test_load(self):
+		exported = {"language": "en", "ngrams": list("abcdefgh")}
+		a = Sample.load(exported)
+		self.assertEqual(a.language, "en")
+		self.assertEqual(a.ranked_ngrams, {k: 7-v for (k, v) in zip("hgfedcba", range(8))})
+
+	def test_export(self):
+		a = Sample("en", {k: 7-v for (k, v) in zip("hgfedcba", range(8))})
+		self.assertEqual(a.export(), {"language": "en", "ngrams": list("abcdefgh")})
+
+	def test_compare(self):
+		a = Sample("ab", {"a": 0, "b": 1, "ab": 2})
+		b = Sample("bc", {"b": 0, "ba": 1, "a": 2, "ab": 3})
+
+		self.assertEqual(a.compare(b), 4)
+		self.assertEqual(b.compare(a), 7)
+
 
 class TestIdentify(TestCase):
 	def test_identify(self):