diff --git a/AUTHORS b/AUTHORS
index e72be3a1da1..45c1bc56761 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -325,6 +325,7 @@ answer newbie questions, and generally made Django that much better:
     Ian Lee <IanLee1521@gmail.com>
     Ibon <ibonso@gmail.com>
     Idan Gazit <idan@gazit.me>
+    Idan Melamed
     Ifedapo Olarewaju <ifedapoolarewaju@gmail.com>
     Igor Kolar <ike@email.si>
     Illia Volochii <illia.volochii@gmail.com>
@@ -478,6 +479,7 @@ answer newbie questions, and generally made Django that much better:
     Luan Pablo <luanpab@gmail.com>
     Luciano Ramalho
     Ludvig Ericson <ludvig.ericson@gmail.com>
+    Luis C. Berrocal <luis.berrocal.1942@gmail.com>
     Łukasz Langa <lukasz@langa.pl>
     Łukasz Rekucki <lrekucki@gmail.com>
     Luke Granger-Brown <django@lukegb.com>
diff --git a/tests/utils_tests/test_lorem_ipsum.py b/tests/utils_tests/test_lorem_ipsum.py
index b90190298a6..78c6a3a4100 100644
--- a/tests/utils_tests/test_lorem_ipsum.py
+++ b/tests/utils_tests/test_lorem_ipsum.py
@@ -1,14 +1,112 @@
 import unittest
+from unittest import mock
 
-from django.utils.lorem_ipsum import paragraphs, words
+from django.utils.lorem_ipsum import paragraph, paragraphs, sentence, words
 
 
-class WebdesignTest(unittest.TestCase):
+class LoremIpsumTests(unittest.TestCase):
+    def test_negative_words(self):
+        """words(n) returns n + 19 words, even if n is negative."""
+        self.assertEqual(
+            words(-5),
+            'lorem ipsum dolor sit amet consectetur adipisicing elit sed do '
+            'eiusmod tempor incididunt ut'
+        )
 
-    def test_words(self):
+    def test_same_or_less_common_words(self):
+        """words(n) for n < 19."""
         self.assertEqual(words(7), 'lorem ipsum dolor sit amet consectetur adipisicing')
 
+    def test_common_words_in_string(self):
+        """words(n) starts with the 19 standard lorem ipsum words for n > 19."""
+        self.assertTrue(
+            words(25).startswith(
+                'lorem ipsum dolor sit amet consectetur adipisicing elit sed '
+                'do eiusmod tempor incididunt ut labore et dolore magna aliqua'
+            )
+        )
+
+    def test_more_words_than_common(self):
+        """words(n) returns n words for n > 19."""
+        self.assertEqual(len(words(25).split()), 25)
+
+    def test_common_large_number_of_words(self):
+        """words(n) has n words when n is greater than len(WORDS)."""
+        self.assertEqual(len(words(500).split()), 500)
+
+    @mock.patch('django.utils.lorem_ipsum.random.sample')
+    def test_not_common_words(self, mock_sample):
+        """words(n, common=False) returns random words."""
+        mock_sample.return_value = ['exercitationem', 'perferendis']
+        self.assertEqual(words(2, common=False), 'exercitationem perferendis')
+
+    def test_sentence_starts_with_capital(self):
+        """A sentence starts with a capital letter."""
+        self.assertTrue(sentence()[0].isupper())
+
+    @mock.patch('django.utils.lorem_ipsum.random.sample')
+    @mock.patch('django.utils.lorem_ipsum.random.choice')
+    @mock.patch('django.utils.lorem_ipsum.random.randint')
+    def test_sentence(self, mock_randint, mock_choice, mock_sample):
+        """
+        Sentences are built using some number of phrases and a set of words.
+        """
+        mock_randint.return_value = 2  # Use two phrases.
+        mock_sample.return_value = ['exercitationem', 'perferendis']
+        mock_choice.return_value = '?'
+        value = sentence()
+        self.assertEqual(mock_randint.call_count, 3)
+        self.assertEqual(mock_sample.call_count, 2)
+        self.assertEqual(mock_choice.call_count, 1)
+        self.assertEqual(value, 'Exercitationem perferendis, exercitationem perferendis?')
+
+    @mock.patch('django.utils.lorem_ipsum.random.choice')
+    def test_sentence_ending(self, mock_choice):
+        """Sentences end with a question mark or a period."""
+        mock_choice.return_value = '?'
+        self.assertIn(sentence()[-1], '?')
+        mock_choice.return_value = '.'
+        self.assertIn(sentence()[-1], '.')
+
+    @mock.patch('django.utils.lorem_ipsum.random.sample')
+    @mock.patch('django.utils.lorem_ipsum.random.choice')
+    @mock.patch('django.utils.lorem_ipsum.random.randint')
+    def test_paragraph(self, mock_paragraph_randint, mock_choice, mock_sample):
+        """paragraph() generates a single paragraph."""
+        # Make creating 2 sentences use 2 phrases.
+        mock_paragraph_randint.return_value = 2
+        mock_sample.return_value = ['exercitationem', 'perferendis']
+        mock_choice.return_value = '.'
+        value = paragraph()
+        self.assertEqual(mock_paragraph_randint.call_count, 7)
+        self.assertEqual(value, (
+            'Exercitationem perferendis, exercitationem perferendis. '
+            'Exercitationem perferendis, exercitationem perferendis.'
+        ))
+
+    @mock.patch('django.utils.lorem_ipsum.random.sample')
+    @mock.patch('django.utils.lorem_ipsum.random.choice')
+    @mock.patch('django.utils.lorem_ipsum.random.randint')
+    def test_paragraphs_not_common(self, mock_randint, mock_choice, mock_sample):
+        """
+        paragraphs(1, common=False) generating one paragraph that's not the
+        COMMON_P paragraph.
+        """
+        # Make creating 2 sentences use 2 phrases.
+        mock_randint.return_value = 2
+        mock_sample.return_value = ['exercitationem', 'perferendis']
+        mock_choice.return_value = '.'
+        self.assertEqual(
+            paragraphs(1, common=False),
+            [
+                'Exercitationem perferendis, exercitationem perferendis. '
+                'Exercitationem perferendis, exercitationem perferendis.'
+            ]
+        )
+        self.assertEqual(mock_randint.call_count, 7)
+
     def test_paragraphs(self):
+        """paragraphs(1) uses the COMMON_P paragraph."""
         self.assertEqual(
             paragraphs(1), [
                 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, '