diff --git a/tests/test_regex.py b/tests/test_regex.py
index ecad9f68..e115d3a6 100644
--- a/tests/test_regex.py
+++ b/tests/test_regex.py
@@ -207,6 +207,7 @@ def test_blank(self):
         self.assertTrue(re.isequal("()", ""))
         self.assertTrue(re.isequal("a|()", "a?"))
         self.assertTrue(re.isequal("a()", "a"))
+        self.assertTrue(re.isequal("a()b()()c()", "abc"))
 
     def test_invalid_symbols(self):
         """Should throw exception if reserved character is in input symbols"""