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diff --git a/test/suite/test_las.py b/test/suite/test_las.py
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+++ b/test/suite/test_las.py
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+#!/usr/bin/env python
+#
+# Public Domain 2014-2017 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 wiredtiger, wttest
+from wtdataset import SimpleDataSet
+
+# test_las.py
+#       Smoke tests to ensure lookaside tables are working.
+class test_las(wttest.WiredTigerTestCase):
+    # Force a small cache.
+    def conn_config(self):
+        return 'cache_size=1GB'
+
+    @wttest.longtest('lookaside table smoke test')
+    def test_las(self):
+        # Create a small table.
+        uri = "table:test_las"
+        nrows = 100
+        ds = SimpleDataSet(self, uri, nrows, key_format="S")
+        ds.populate()
+
+        # Take a snapshot.
+        self.session.snapshot("name=xxx")
+
+        # Insert a large number of records, we'll hang if the lookaside table
+        # isn't doing its thing.
+        c = self.session.open_cursor(uri)
+        bigvalue = "abcde" * 100
+        for i in range(1, 1000000):
+            c.set_key(ds.key(nrows + i))
+            c.set_value(bigvalue)
+            self.assertEquals(c.insert(), 0)
+
+if __name__ == '__main__':
+    wttest.run()