diff --git a/tests/utils.py b/tests/utils.py
index 416bb13..fc93c50 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -1,6 +1,7 @@
 from utils.tau import tau
 from utils.entropy import entropy
 from utils.jaccard import jaccard
+from utils.sequence import translate
 
 from unittest import TestCase
 
@@ -18,3 +19,16 @@ def test_jaccard(self):
         self.assertEqual(jaccard('ab', 'bc'), 1/3)
         self.assertEqual(jaccard('ab', 'cd'), 0)
         self.assertEqual(jaccard('ab', 'ab'), 1)
+
+    def test_sequence(self):
+        sequence = "ATGTCAGAATTATTACAGTTGCCTCCAGGTTTCCGATTTCACCCTACCGATGAAGAGCTTGTCATGCACTATCTCTGCCGCAAATGTGCCTCTCAGTCCATCGCCGTTCCGATCATCGCTGAGATCGATCTCTACAAATACGATCCATGGGAGCTTCCTGGTTTAGCCTTGTATGGTGAGAAGGAATGGTACTTCTTCTCTCCCAGGGACAGAAAATATCCCAACGGTTCGCGTCCTAACCGGTCCGCTGGTTCTGGTTACTGGAAAGCTACCGGAGCTGATAAACCGATCGGACTACCTAAACCGGTCGGAATTAAGAAAGCTCTTGTTTTCTACGCCGGCAAAGCTCCAAAGGGAGAGAAAACCAATTGGATCATGCACGAGTACCGTCTCGCCGACGTTGACCGGTCCGTTCGCAAGAAGAAGAATAGTCTCAGGCTGGATGATTGGGTTCTCTGCCGGATTTACAACAAAAAAGGAGCTACCGAGAGGCGGGGACCACCGCCTCCGGTTGTTTACGGCGACGAAATCATGGAGGAGAAGCCGAAGGTGACGGAGATGGTTATGCCTCCGCCGCCGCAACAGACAAGTGAGTTCGCGTATTTCGACACGTCGGATTCGGTGCCGAAGCTGCATACTACGGATTCGAGTTGCTCGGAGCAGGTGGTGTCGCCGGAGTTCACGAGCGAGGTTCAGAGCGAGCCCAAGTGGAAAGATTGGTCGGCCGTAAGTAATGACAATAACAATACCCTTGATTTTGGGTTTAATTACATTGATGCCACCGTGGATAACGCGTTTGGAGGAGGAGGGAGTAGTAATCAGATGTTTCCGCTACAGGATATGTTCATGTACATGCAGAAGCCTTACTAG"
+        translation = "MSELLQLPPGFRFHPTDEELVMHYLCRKCASQSIAVPIIAEIDLYKYDPWELPGLALYGEKEWYFFSPRDRKYPNGSRPNRSAGSGYWKATGADKPIGLPKPVGIKKALVFYAGKAPKGEKTNWIMHEYRLADVDRSVRKKKNSLRLDDWVLCRIYNKKGATERRGPPPPVVYGDEIMEEKPKVTEMVMPPPPQQTSEFAYFDTSDSVPKLHTTDSSCSEQVVSPEFTSEVQSEPKWKDWSAVSNDNNNTLDFGFNYIDATVDNAFGGGGSSNQMFPLQDMFMYMQKPY*"
+
+        self.assertEqual(translate(sequence), translation)
+        self.assertEqual(translate(sequence, trim=False), translation)
+        self.assertNotEqual(translate("AAA" + sequence, trim=False), translation)
+        self.assertEqual(translate("AAA" + sequence, trim=True), translation)
+        self.assertNotEqual(translate(sequence+"AAA", return_on_stop=False), translation)
+        self.assertEqual(translate(sequence+"AAA", return_on_stop=False), translation + "K")
+        self.assertEqual(translate(sequence+"AAA", return_on_stop=True), translation)
+        self.assertEqual(translate("ATGSEB"), "MX")
diff --git a/utils/sequence.py b/utils/sequence.py
index 1620ade..e55855e 100644
--- a/utils/sequence.py
+++ b/utils/sequence.py
@@ -36,7 +36,7 @@ def translate(sequence, trim=True, return_on_stop=True):
 
     if trim:
         start = sequence.find('ATG')
-        trimmed_sequence[start:]
+        trimmed_sequence = trimmed_sequence[start:]
 
     codons = [trimmed_sequence[i:i+3] for i in range(0, len(trimmed_sequence), 3)]