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diff --git a/src/silx/utils/test/test_testutils.py b/src/silx/utils/test/test_testutils.py
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+++ b/src/silx/utils/test/test_testutils.py
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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2021 European Synchrotron Radiation Facility
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ###########################################################################*/
+"""Tests for testutils module"""
+
+__authors__ = ["V. Valls"]
+__license__ = "MIT"
+__date__ = "18/11/2019"
+
+
+import unittest
+import logging
+from .. import testutils
+
+
+class TestLoggingValidator(unittest.TestCase):
+    """Tests for LoggingValidator"""
+
+    def testRight(self):
+        logger = logging.getLogger(__name__ + "testRight")
+        listener = testutils.LoggingValidator(logger, error=1)
+        with listener:
+            logger.error("expected")
+            logger.info("ignored")
+
+    def testCustomLevel(self):
+        logger = logging.getLogger(__name__ + "testCustomLevel")
+        listener = testutils.LoggingValidator(logger, error=1)
+        with listener:
+            logger.error("expected")
+            logger.log(666, "custom level have to be ignored")
+
+    def testWrong(self):
+        logger = logging.getLogger(__name__ + "testWrong")
+        listener = testutils.LoggingValidator(logger, error=1)
+        with self.assertRaises(RuntimeError):
+            with listener:
+                logger.error("expected")
+                logger.error("not expected")
+
+    def testManyErrors(self):
+        logger = logging.getLogger(__name__ + "testManyErrors")
+        listener = testutils.LoggingValidator(logger, error=1, warning=2)
+        with self.assertRaises(RuntimeError):
+            with listener:
+                pass
+
+    def testCanBeChecked(self):
+        logger = logging.getLogger(__name__ + "testCanBreak")
+        listener = testutils.LoggingValidator(logger, error=1, warning=2)
+        with self.assertRaises(RuntimeError):
+            with listener:
+                logger.error("aaa")
+                logger.warning("aaa")
+                self.assertFalse(listener.can_be_checked())
+                logger.error("aaa")
+                # Here we know that it's already wrong without a big cost
+                self.assertTrue(listener.can_be_checked())
+
+    def testWithAs(self):
+        logger = logging.getLogger(__name__ + "testCanBreak")
+        with testutils.LoggingValidator(logger) as listener:
+            logger.error("aaa")
+            self.assertIsNotNone(listener)
+
+    def testErrorMessage(self):
+        logger = logging.getLogger(__name__ + "testCanBreak")
+        listener = testutils.LoggingValidator(logger, error=1, warning=2)
+        with self.assertRaisesRegex(RuntimeError, "aaabbb"):
+            with listener:
+                logger.error("aaa")
+                logger.warning("aaabbb")
+                logger.error("aaa")