diff --git a/.travis.yml b/.travis.yml
index 1a57c9f5e..fdb89634a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,7 +44,7 @@ matrix:
       env: WITH_OPT_DEPS=true
       dist: xenial
 
-  allow_failures:
+#  allow_failures:
     - python: "nightly"
       env: WITH_OPT_DEPS=true
       dist: xenial
diff --git a/plugins/Math/test.py b/plugins/Math/test.py
index 4db74465f..c0edadcfa 100644
--- a/plugins/Math/test.py
+++ b/plugins/Math/test.py
@@ -137,7 +137,8 @@ class MathTestCase(PluginTestCase):
 
     def testCalcMemoryError(self):
         self.assertRegexp('calc ' + '('*10000,
-            '(too much recursion'  # cpython
+            '(too much recursion'  # cpython < 3.10
+            '|too many nested parentheses'  # cpython >= 3.10
             '|parenthesis is never closed)'  # pypy
         )