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diff --git a/src/lxml/tests/test_threading.py b/src/lxml/tests/test_threading.py
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index 8948c3ec6..5ede3f805 100644
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--- a/src/lxml/tests/test_threading.py
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+++ b/src/lxml/tests/test_threading.py
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@@ -130,7 +130,7 @@ def test_thread_xslt_parsing_error_log(self):
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     <xsl:template match="tag" />
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 ''' + '\n'.join('<xsl:template match="tag%x" />' % i for i in range(200)) + '''
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-    <xsl:foo />
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+    <xsl:UnExpectedElement />
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 </xsl:stylesheet>''')
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         self.assertRaises(etree.XSLTParseError,
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                           etree.XSLT, style)
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@@ -153,9 +153,10 @@ def run_thread():
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             self.assertTrue(len(log))
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             if last_log is not None:
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                 self.assertEqual(len(last_log), len(log))
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-            self.assertEqual(4, len(log))
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+            self.assertTrue(len(log) >= 2, len(log))
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             for error in log:
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-                self.assertTrue(':ERROR:XSLT:' in str(error))
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+                self.assertTrue(':ERROR:XSLT:' in str(error), str(error))
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+            self.assertTrue(any('UnExpectedElement' in str(error) for error in log), log)
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             last_log = log
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     def test_thread_xslt_apply_error_log(self):