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diff --git a/src/third_party/wiredtiger/test/suite/test_checkpoint05.py b/src/third_party/wiredtiger/test/suite/test_checkpoint05.py
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+#!/usr/bin/env python
+#
+# Public Domain 2014-2020 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.
+#
+# test_checkpoint05.py
+# Verify that we don't accumulate a lot of checkpoints while a backup
+# cursor is open. WiredTiger checkpoints created after the backup cursor
+# should get deleted as usual.
+
+import time
+import wiredtiger, wttest
+
+class test_checkpoint05(wttest.WiredTigerTestCase):
+    conn_config = 'create,cache_size=100MB,log=(archive=false,enabled=true,file_max=100K)'
+
+    def count_checkpoints(self):
+        metadata_cursor = self.session.open_cursor('metadata:', None, None)
+
+        nckpt = 0
+        while metadata_cursor.next() == 0:
+            key = metadata_cursor.get_key()
+            value = metadata_cursor[key]
+            nckpt = nckpt + value.count("WiredTigerCheckpoint")
+        metadata_cursor.close()
+        return nckpt
+
+    def test_checkpoints_during_backup(self):
+        self.uri = 'table:ckpt05'
+        self.session.create(self.uri, 'key_format=i,value_format=i')
+
+        # Setup: Insert some data and checkpoint it
+        cursor = self.session.open_cursor(self.uri, None)
+        for i in range(16):
+            cursor[i] = i
+        self.session.checkpoint(None)
+
+        # Create backup and check how many checkpoints we have.
+        backup_cursor = self.session.open_cursor('backup:', None, None)
+        initial_count = self.count_checkpoints()
+
+        # Checkpoints created immediately after a backup cursor may get pinned.
+        # Pause to avoid this.
+        time.sleep(2)
+
+        # Take a bunch of checkpoints.
+        for i in range (50):
+            self.session.checkpoint('force=true')
+        cursor.close()
+
+        # There may be a few more checkpoints than when we opened the
+        # backup cursor, but not too many more.  The factor of three
+        # is generous.  But if WT isn't deleting checkpoints there would
+        # be about 30x more checkpoints here.
+        final_count = self.count_checkpoints()
+        self.assertTrue (final_count < initial_count * 3)
+
+        self.session.close()
+
+if __name__ == '__main__':
+    wttest.run()