diff --git a/parso/python/normalizer.py b/parso/python/normalizer.py
index e394de0..d910236 100644
--- a/parso/python/normalizer.py
+++ b/parso/python/normalizer.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 import codecs
+import warnings
 import re
 from contextlib import contextmanager
 
@@ -570,7 +571,10 @@ class ErrorFinder(Normalizer):
                     func = codecs.unicode_escape_decode
 
                 try:
-                    func(payload)
+                    with warnings.catch_warnings():
+                        # The warnings from parsing strings are not relevant.
+                        warnings.filterwarnings('ignore')
+                        func(payload)
                 except UnicodeDecodeError as e:
                     self._add_syntax_error('(unicode error) ' + str(e), leaf)
                 except ValueError as e:
diff --git a/test/test_python_errors.py b/test/test_python_errors.py
index c881a6f..c589be2 100644
--- a/test/test_python_errors.py
+++ b/test/test_python_errors.py
@@ -241,6 +241,8 @@ GLOBAL_NONLOCAL_ERROR = [
 if sys.version_info >= (3, 6):
     FAILING_EXAMPLES += GLOBAL_NONLOCAL_ERROR
     FAILING_EXAMPLES.append('(%s *d) = x' % ('a,' * 256))
+if sys.version_info >= (3, 5):
+    FAILING_EXAMPLES.append('[*[] for a in [1]]')
 if sys.version_info >= (3, 4):
     # Before that del None works like del list, it gives a NameError.
     FAILING_EXAMPLES.append('del None')
@@ -253,6 +255,8 @@ if sys.version_info >= (3,):
         # A symtable error that raises only a SyntaxWarning in Python 2.
         'def x(): from math import *',
         'b"ä"',
+        '{**{} for a in [1]}',
+        '"s" b""',
     ]
 if sys.version_info >= (2, 7):
     # This is something that raises a different error in 2.6 than in the other
@@ -381,9 +385,6 @@ def test_default_except_error_postition():
         ('del *a, b', '3.5'),
         ('def x(*): pass', '3.5'),
         ('async def foo():\n def nofoo():[x async for x in []]', '3.6'),
-        ('[*[] for a in [1]]', '3.5'),
-        ('{**{} for a in [1]}', '3.5'),
-        ('"s" b""', '3.5'),
     ]
 )
 def test_python_exception_matches_version(code, version):