diff --git a/elementpath/helpers.py b/elementpath/helpers.py
index a5a44c44..898d60aa 100644
--- a/elementpath/helpers.py
+++ b/elementpath/helpers.py
@@ -283,7 +283,7 @@ def split_function_test(function_test: str) -> List[str]:
 
 def is_absolute_uri(uri: str) -> bool:
     try:
-        parts = urlsplit(uri)
+        parts = urlsplit(uri.strip())
     except ValueError:
         return False
     else:
diff --git a/tests/test_xpath1_parser.py b/tests/test_xpath1_parser.py
index e1fa88c7..82da87c4 100644
--- a/tests/test_xpath1_parser.py
+++ b/tests/test_xpath1_parser.py
@@ -1686,7 +1686,6 @@ def test_get_function(self):
         self.assertEqual(func('foo', 1, ' bar', 2), 'foo1 bar2')
 
 
-
 @unittest.skipIf(lxml_etree is None, "The lxml library is not installed")
 class LxmlXPath1ParserTest(XPath1ParserTest):
     etree = lxml_etree