diff --git a/language_tags/tags.py b/language_tags/tags.py
index d91fe75..3c5359e 100644
--- a/language_tags/tags.py
+++ b/language_tags/tags.py
@@ -81,7 +81,7 @@ def search(description, all=False):
         """
         Gets a list of :class:`language_tags.Subtag.Subtag` objects where the description matches.
 
-        :param description: a string or compiled regular expression. For example: ``search(re.compile('\d{4}'))`` if the
+        :param description: a string or compiled regular expression. For example: ``search(re.compile(r'\d{4}'))`` if the
             description of the returned subtag must contain four contiguous numerical digits.
         :type description: str or RegExp
         :param all: If set on True grandfathered and redundant tags will be included in the return
diff --git a/tests/test_tags.py b/tests/test_tags.py
index 0c40ec5..bcf06d2 100644
--- a/tests/test_tags.py
+++ b/tests/test_tags.py
@@ -64,7 +64,7 @@ def test_search_exact_match(self):
         self.assertEqual(subtags[0].format, 'prs')
 
     def test_search_regexp(self):
-        subtags = tags.search(re.compile('\d{4}'))
+        subtags = tags.search(re.compile(r/'\d{4}'))
         self.assertGreater(len(subtags), 0)
 
     def test_type(self):
@@ -99,7 +99,7 @@ def test_languages(self):
         self.assertIn('\'en\' is not a macrolanguage.', context.exception.args)
 
     def test_date(self):
-        self.assertIsNotNone(re.compile('\d{4}\-\d{2}\-\d{2}').search(tags.date()))
+        self.assertIsNotNone(re.compile(r'\d{4}\-\d{2}\-\d{2}').search(tags.date()))
 
     def test_description(self):
         description = tags.description('nl-BE')