diff --git a/lib/markdown2.py b/lib/markdown2.py
index 56dd2f11..e87ff92f 100755
--- a/lib/markdown2.py
+++ b/lib/markdown2.py
@@ -2232,7 +2232,7 @@ def _encode_amps_and_angles(self, text):
         text = self._naked_gt_re.sub('>', text)
         return text
 
-    _incomplete_tags_re = re.compile("<(/?\w+?(?!\w).+?[\s/]+?)")
+    _incomplete_tags_re = re.compile(r"<(/?\w+?(?!\w).+?[\s/]+?)")
 
     def _encode_incomplete_tags(self, text):
         if self.safe_mode not in ("replace", "escape"):
diff --git a/test/testall.py b/test/testall.py
index b2047887..689fe5c0 100644
--- a/test/testall.py
+++ b/test/testall.py
@@ -20,7 +20,7 @@ def _python_ver_from_python(python):
     assert ' ' not in python
     o = os.popen('''%s -c "import sys; print(sys.version)"''' % python)
     ver_str = o.read().strip()
-    ver_bits = re.split("\.|[^\d]", ver_str, 2)[:2]
+    ver_bits = re.split(r"\.|[^\d]", ver_str, 2)[:2]
     ver = tuple(map(int, ver_bits))
     return ver