diff --git a/src/caosadvancedtools/cache.py b/src/caosadvancedtools/cache.py
index bde76abf08cb5a8a7835746d1dcd827cc4b2c071..c255a00d0216c2b944e54158de6910538f3da1ae 100644
--- a/src/caosadvancedtools/cache.py
+++ b/src/caosadvancedtools/cache.py
@@ -29,9 +29,8 @@ import os
 import sqlite3
 from hashlib import sha256
 
-from lxml import etree
-
 import caosdb as db
+from lxml import etree
 
 
 def put_in_container(stuff):
@@ -44,11 +43,23 @@ def put_in_container(stuff):
     return stuff
 
 
+def cleanXML(xml):
+    # remove transaction benchmark
+    props = xml.findall('TransactionBenchmark')
+
+    for prop in props:
+        parent = prop.find("..")
+        parent.remove(prop)
+
+    return xml
+
+
 def get_pretty_xml(cont):
     cont = put_in_container(cont)
+    xml = cont.to_xml(local_serialization=True)
+    cleanXML(xml)
 
-    return etree.tounicode(cont.to_xml(
-        local_serialization=True), pretty_print=True)
+    return etree.tounicode(xml, pretty_print=True)
 
 
 class Cache(object):
diff --git a/unittests/test_cache.py b/unittests/test_cache.py
index 985ac15ca52a06c6e00c13c6d87adcb8d21f1595..2d7b863fe971dd61a575e24f52853de4f5c4e204 100644
--- a/unittests/test_cache.py
+++ b/unittests/test_cache.py
@@ -26,8 +26,8 @@ from copy import deepcopy
 from tempfile import NamedTemporaryFile
 
 import caosdb as db
-
-from caosadvancedtools.cache import Cache
+from caosadvancedtools.cache import Cache, cleanXML
+from lxml import etree
 
 
 class CacheTest(unittest.TestCase):
@@ -75,3 +75,19 @@ class CacheTest(unittest.TestCase):
         self.cache.insert_list(hashes, entities)
         self.assertEqual(self.cache.check_existing(hashes[0]), 1001)
         self.assertEqual(self.cache.check_existing(hashes[2]), 1003)
+
+    def test_clean(self):
+        xml = etree.XML(
+            """\
+            <Entities>
+  <TransactionBenchmark>
+    </TransactionBenchmark>
+  <RecordType id="110" name="Guitar">
+    <Version id="eb8c7527980e598b887e84d055db18cfc3806ce6" head="true"/>
+    <Parent id="108" name="MusicalInstrument" flag="inheritance:OBLIGATORY,"/>
+    <Property id="106" name="electric" datatype="BOOLEAN" importance="RECOMMENDED" flag="inheritance:FIX"/>
+  </RecordType>
+    </Entities>
+""")
+        cleanXML(xml)
+        assert len(xml.findall('TransactionBenchmark')) == 0