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diff --git a/src/third_party/wiredtiger/test/suite/test_tiered03.py b/src/third_party/wiredtiger/test/suite/test_tiered03.py
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+#!/usr/bin/env python
+#
+# Public Domain 2014-2021 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 os, re
+import wiredtiger, wtscenario, wttest
+from wtdataset import SimpleDataSet
+
+# test_tiered03.py
+#    Test block-log-structured tree configuration options.
+class test_tiered03(wttest.WiredTigerTestCase):
+    K = 1024
+    M = 1024 * K
+    G = 1024 * M
+    uri = 'file:test_tiered03'
+
+    # Occasionally add a lot of records, so that merges (and bloom) happen.
+    record_count_scenarios = wtscenario.quick_scenarios(
+        'nrecs', [10, 10000], [0.9, 0.1])
+
+    scenarios = wtscenario.make_scenarios(record_count_scenarios, prune=100, prunelong=500)
+
+    # Test sharing data between a primary and a secondary
+    def test_sharing(self):
+        args = 'block_allocation=log-structured'
+        self.verbose(3,
+            'Test log-structured allocation with config: ' + args + ' count: ' + str(self.nrecs))
+        ds = SimpleDataSet(self, self.uri, 10, config=args)
+        ds.populate()
+        ds.check()
+        self.session.checkpoint()
+        ds.check()
+
+        # Create a secondary database
+        dir2 = os.path.join(self.home, 'SECONDARY')
+        os.mkdir(dir2)
+        conn2 = self.setUpConnectionOpen(dir2)
+        session2 = conn2.open_session()
+
+        # Reference the tree from the secondary:
+        metac = self.session.open_cursor('metadata:')
+        metac2 = session2.open_cursor('metadata:', None, 'readonly=0')
+        uri2 = self.uri[:5] + '../' + self.uri[5:]
+        metac2[uri2] = metac[self.uri] + ",readonly=1"
+
+        cursor2 = session2.open_cursor(uri2)
+        ds.check_cursor(cursor2)
+        cursor2.close()
+
+        newds = SimpleDataSet(self, self.uri, 10000, config=args)
+        newds.populate()
+        newds.check()
+        self.session.checkpoint()
+        newds.check()
+
+        # Check we can still read from the last checkpoint
+        cursor2 = session2.open_cursor(uri2)
+        ds.check_cursor(cursor2)
+        cursor2.close()
+
+        # Bump to new checkpoint
+        origmeta = metac[self.uri]
+        checkpoint = re.search(r',checkpoint=\(.+?\)\)', origmeta).group(0)[1:]
+        self.pr('Orig checkpoint: ' + checkpoint)
+        session2.alter(uri2, checkpoint)
+        self.pr('New metadata on secondaery: ' + metac2[uri2])
+
+        # Check that we can see the new data
+        cursor2 = session2.open_cursor(uri2)
+        newds.check_cursor(cursor2)
+
+if __name__ == '__main__':
+    wttest.run()