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diff --git a/src/third_party/wiredtiger/test/suite/test_debug_mode08.py b/src/third_party/wiredtiger/test/suite/test_debug_mode08.py
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+++ b/src/third_party/wiredtiger/test/suite/test_debug_mode08.py
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+#!/usr/bin/env python
+#
+# Public Domain 2014-2019 MongoDB, Inc.
+# Public Domain 2008-2014 WiredTiger, Inc.
+#
+# This is free and unencumbered software released into the public domain.
+#
+# Anyone is free to copy, modify, publish, use, compile, sell, or
+# distribute this software, either in source code form or as a compiled
+# binary, for any purpose, commercial or non-commercial, and by any
+# means.
+#
+# In jurisdictions that recognize copyright laws, the author or authors
+# of this software dedicate any and all copyright interest in the
+# software to the public domain. We make this dedication for the benefit
+# of the public at large and to the detriment of our heirs and
+# successors. We intend this dedication to be an overt act of
+# relinquishment in perpetuity of all present and future rights to this
+# software under copyright law.
+#
+# 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 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.
+
+import wttest, wiredtiger, test_base03
+
+# test_debug_mode08.py
+#   Test the debug mode setting for cursor_copy.
+# There's no great way to detect that cursor_copy is really working, as
+# the extra malloc/free that WT does cannot easily be detected.  However,
+# it's useful to run some tests with the mode enabled. We make a subclass
+# of test_base03, so we'll inherit those tests to be run with the debug mode
+# configuration enabled.
+class test_debug_mode08(test_base03.test_base03):
+    conn_config = 'debug_mode=(cursor_copy=true)'
+    uri = 'file:test_debug_mode08'
+
+    def test_reconfig(self):
+        ''' Test reconfigure with some minimal cursor activity. '''
+        self.session.create(self.uri, 'key_format=s,value_format=s')
+        cursor = self.session.open_cursor(self.uri, None)
+        cursor['key'] = 'value'
+        cursor.close()
+
+        conn_reconfig = 'debug_mode=(cursor_copy=false)'
+        self.conn.reconfigure(conn_reconfig)
+        cursor = self.session.open_cursor(self.uri, None)
+        cursor['key'] = 'value'
+        cursor.close()
+
+        self.conn.reconfigure(self.conn_config)
+        cursor = self.session.open_cursor(self.uri, None)
+        cursor['key'] = 'value'
+        cursor.close()
+
+if __name__ == '__main__':
+    wttest.run()