diff --git a/src/caosdb/common/models.py b/src/caosdb/common/models.py
index 045c5002d17e55e9b9c612a5709332212dfcfae1..dc7a7da08271ef72a9210aa597ab42a2afb85d6a 100644
--- a/src/caosdb/common/models.py
+++ b/src/caosdb/common/models.py
@@ -652,7 +652,7 @@ class Entity(object):
         if self.description is not None:
             xml.set("description", str(self.description))
 
-        if self.value is not None and self.value != "":
+        if self.value is not None:
             if isinstance(self.value, Entity):
                 if self.value.id is not None:
                     xml.text = str(self.value.id)
@@ -671,11 +671,15 @@ class Entity(object):
                             v_elem.text = str(v.name)
                         else:
                             v_elem.text = str(v)
+                    elif v == "":
+                        v_elem.append(etree.Element("EmptyString"))
                     elif v is None:
                         pass
                     else:
                         v_elem.text = str(v)
                     xml.append(v_elem)
+            elif self.value == "":
+                xml.append(etree.Element("EmptyString"))
             else:
                 xml.text = str(self.value)
 
@@ -943,33 +947,31 @@ class Entity(object):
 def _parse_col_values(cdt, vals):
     matcher = re.compile(r"^(?P<col>[^<]+)<(?P<dt>[^>]+)>$")
     m = matcher.match(cdt)
-    try:
-        if m:
-            col = m.group("col")
-            dt = m.group("dt")
+    if m:
+        col = m.group("col")
+        dt = m.group("dt")
 
-            if col == "LIST":
-                ret = list()
-                add = ret.append
-            else:
-                return vals
+        if col == "LIST":
+            ret = list()
+            add = ret.append
+        else:
+            return vals
 
-            for v in vals:
-                if dt == DOUBLE:
-                    add(float(v))
-                elif dt == TEXT or dt == DATETIME:
+        for v in vals:
+            if dt == DOUBLE:
+                add(float(v))
+            elif dt == TEXT or dt == DATETIME:
+                add(v)
+            else:
+                try:
+                    add(int(v))
+                except BaseException:
                     add(v)
-                else:
-                    try:
-                        add(int(v))
-                    except BaseException:
-                        add(v)
-
-            return ret
 
-    except BaseException:
-        traceback.print_exc(file=sys.stderr)
+        return ret
 
+    if len(vals) == 1:
+        return vals[0]
     return vals
 
 
@@ -3560,10 +3562,13 @@ def _parse_single_xml_element(elem):
         Entity._from_xml(entity, elem)
 
         return entity
+    elif elem.tag.lower() == "emptystring":
+        return ""
     elif elem.tag.lower() == "value":
-        if elem.text is None:
+        if len(elem) == 1 and elem[0].tag.lower() == "emptystring":
+            return ""
+        elif elem.text is None or elem.text.strip() == "":
             return None
-
         return str(elem.text.strip())
     elif elem.tag.lower() == "querytemplate":
         return QueryTemplate._from_xml(elem)
diff --git a/unittests/record.py b/unittests/record.py
index ac20f1ce08b249035c1ebd0f64d41bdb8f7ac346..22e7676bbd50cf060f534e655bc29dd2b512a0bc 100644
--- a/unittests/record.py
+++ b/unittests/record.py
@@ -27,8 +27,85 @@
 import caosdb as db
 from lxml import etree
 
-
 # This is Record ID 171179 from the current CaosDB
-testrecord = db.Record._from_xml(db.Record(), etree.fromstring("""
-<Record id="171179"><TransactionBenchmark>\n    </TransactionBenchmark><Parent id="163454" name="LeapExperiment" description="Experiment for the LEAP project."/><Property id="163414" name="experimentId" description="A unique identifier for experiments" datatype="TEXT" importance="FIX" flag="inheritance:FIX">KCdSYWJiaXQnLCAnZXhfdml2bycsICdzeW5jaHJvbml6YXRpb25fbWFwJywgTm9uZSwgJzIwMTctMDgtMTEnLCBOb25lLCBOb25lKQ==</Property><Property id="163442" name="date" description="A calendar date. When something took place." datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2017-08-11</Property><Property id="163399" name="vivoness" description="How the experiment was done: IN_VIVO or EX_VIVO." datatype="TEXT" importance="FIX" flag="inheritance:FIX">ex_vivo</Property><Property id="163418" name="species" description="The species of the experimental animal." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Rabbit</Property><Property id="163449" name="ExperimentSeries" description="A collection of [Experiment] records which have the same [aim]." datatype="ExperimentSeries" importance="FIX" flag="inheritance:FIX">163386</Property><Property id="163397" name="MultiRecRecording" datatype="LIST&lt;MultiRecRecording&gt;" importance="FIX" flag="inheritance:FIX"><Value>171242</Value><Value>170651</Value><Value>171701</Value><Value>172074</Value><Value>171408</Value><Value>171687</Value><Value>170791</Value><Value>171115</Value><Value>171893</Value><Value>171237</Value><Value>171309</Value><Value>170899</Value><Value>171048</Value><Value>171077</Value><Value>171723</Value><Value>171085</Value><Value>171812</Value><Value>171829</Value><Value>171669</Value><Value>170695</Value><Value>170875</Value><Value>171751</Value><Value>171412</Value><Value>172204</Value><Value>170997</Value><Value>171490</Value><Value>171504</Value><Value>170977</Value><Value>171895</Value><Value>172233</Value><Value>171261</Value><Value>171318</Value><Value>171014</Value><Value>171132</Value><Value>171575</Value><Value>172217</Value><Value>171638</Value><Value>170656</Value><Value>171927</Value><Value>172232</Value><Value>171864</Value><Value>171564</Value><Value>171090</Value><Value>171633</Value><Value>171456</Value><Value>171755</Value><Value>170641</Value><Value>172144</Value><Value>171872</Value><Value>171619</Value><Value>171180</Value><Value>172019</Value><Value>171193</Value><Value>171069</Value><Value>171643</Value><Value>171789</Value><Value>170785</Value><Value>170904</Value><Value>171130</Value><Value>171098</Value><Value>171241</Value><Value>171796</Value><Value>171776</Value><Value>171175</Value><Value>171112</Value><Value>171514</Value><Value>171854</Value><Value>170962</Value><Value>171818</Value><Value>170745</Value><Value>171149</Value><Value>170639</Value><Value>171508</Value><Value>170800</Value><Value>171141</Value><Value>171414</Value><Value>171325</Value><Value>172168</Value><Value>171184</Value><Value>172083</Value><Value>172029</Value><Value>171556</Value><Value>172195</Value><Value>170789</Value><Value>171300</Value><Value>172230</Value><Value>171720</Value><Value>171341</Value><Value>171937</Value><Value>171673</Value><Value>172106</Value><Value>171281</Value><Value>171897</Value><Value>171108</Value><Value>172014</Value><Value>170867</Value><Value>171531</Value><Value>171674</Value><Value>172077</Value><Value>170944</Value><Value>171228</Value><Value>172207</Value><Value>171039</Value><Value>171778</Value><Value>170794</Value><Value>171646</Value><Value>172027</Value><Value>171279</Value><Value>171618</Value><Value>171233</Value><Value>170811</Value><Value>171357</Value><Value>172180</Value><Value>171585</Value><Value>170774</Value><Value>171625</Value><Value>171310</Value><Value>171855</Value><Value>172084</Value><Value>171395</Value><Value>171955</Value><Value>172216</Value><Value>171705</Value><Value>171312</Value><Value>171659</Value><Value>172192</Value><Value>171157</Value><Value>171978</Value><Value>170707</Value><Value>171250</Value><Value>171929</Value><Value>171709</Value><Value>170898</Value><Value>170723</Value><Value>172060</Value><Value>171693</Value><Value>172036</Value><Value>172162</Value><Value>171460</Value><Value>172065</Value><Value>171174</Value><Value>171461</Value><Value>172093</Value><Value>171200</Value><Value>172007</Value><Value>172102</Value><Value>171368</Value><Value>171761</Value><Value>172157</Value><Value>171354</Value><Value>170698</Value><Value>171254</Value><Value>171740</Value><Value>171303</Value><Value>170874</Value><Value>171248</Value><Value>171698</Value><Value>171191</Value><Value>171948</Value><Value>171920</Value><Value>171319</Value><Value>170649</Value><Value>171731</Value><Value>170643</Value><Value>171007</Value><Value>172186</Value><Value>171831</Value><Value>172128</Value><Value>172154</Value><Value>170841</Value><Value>171530</Value><Value>171142</Value><Value>171857</Value><Value>170982</Value><Value>171852</Value><Value>171574</Value><Value>171136</Value><Value>172107</Value><Value>171819</Value><Value>171746</Value><Value>171036</Value><Value>171331</Value><Value>170682</Value><Value>171779</Value><Value>171747</Value><Value>171383</Value><Value>170748</Value><Value>170691</Value><Value>170820</Value><Value>170829</Value><Value>171888</Value><Value>172098</Value><Value>172199</Value><Value>171290</Value><Value>170935</Value><Value>171056</Value><Value>171131</Value><Value>171415</Value><Value>171105</Value><Value>171135</Value><Value>171371</Value><Value>171640</Value><Value>171534</Value><Value>171012</Value><Value>172047</Value><Value>172081</Value><Value>171666</Value><Value>172089</Value><Value>172063</Value><Value>171449</Value><Value>171159</Value><Value>171808</Value><Value>171932</Value><Value>170664</Value><Value>172000</Value><Value>171220</Value><Value>170955</Value><Value>170740</Value><Value>171350</Value><Value>171528</Value><Value>171081</Value><Value>171199</Value><Value>171711</Value><Value>171446</Value><Value>171607</Value><Value>171292</Value><Value>170762</Value><Value>171896</Value><Value>170810</Value><Value>170990</Value><Value>171332</Value><Value>171080</Value><Value>171075</Value><Value>172130</Value><Value>171525</Value><Value>171993</Value><Value>172091</Value><Value>171924</Value><Value>172153</Value><Value>170661</Value><Value>171190</Value><Value>171021</Value><Value>172158</Value><Value>171980</Value><Value>171480</Value><Value>171598</Value><Value>171827</Value><Value>172166</Value><Value>171392</Value><Value>171512</Value><Value>171008</Value><Value>171610</Value><Value>171692</Value><Value>171908</Value><Value>171733</Value><Value>170866</Value><Value>171100</Value></Property><Property id="163401" name="PulsarProtocolLog" description="A log from Pulsar. This is the generic super type. Sub types will represent the log of a particular protocol." datatype="LIST&lt;PulsarProtocolLog&gt;" importance="FIX" flag="inheritance:FIX"><Value>171750</Value><Value>171019</Value><Value>171765</Value><Value>171269</Value><Value>170700</Value><Value>171665</Value><Value>171496</Value><Value>170954</Value><Value>170780</Value><Value>171313</Value><Value>171202</Value></Property><Property id="163429" name="ACQRawData" description="A file which is the direct/raw output of Acqknowledge." datatype="ACQRawData" importance="FIX" flag="inheritance:FIX">45506</Property><Property id="163456" name="syncMapValuesFiles" description="DESCRIBE ME!" datatype="LIST&lt;FILE&gt;" importance="FIX" flag="inheritance:FIX"><Value>45508</Value><Value>45509</Value><Value>45510</Value><Value>45511</Value><Value>45512</Value><Value>45513</Value><Value>45514</Value><Value>45515</Value><Value>45516</Value><Value>45517</Value><Value>45518</Value><Value>45519</Value><Value>45520</Value><Value>45521</Value><Value>45522</Value><Value>45523</Value><Value>45524</Value><Value>45525</Value><Value>45526</Value><Value>45527</Value><Value>45528</Value><Value>45529</Value><Value>45530</Value><Value>45531</Value><Value>45532</Value></Property></Record>
+testrecord1 = db.Record._from_xml(db.Record(), etree.fromstring("""<Record id="171179"><TransactionBenchmark></TransactionBenchmark><Parent id="163454" name="LeapExperiment" description="Experiment for the LEAP project."/><Property id="163414" name="experimentId" description="A unique identifier for experiments" datatype="TEXT" importance="FIX" flag="inheritance:FIX">KCdSYWJiaXQnLCAnZXhfdml2bycsICdzeW5jaHJvbml6YXRpb25fbWFwJywgTm9uZSwgJzIwMTctMDgtMTEnLCBOb25lLCBOb25lKQ==</Property><Property id="568765" name="LISTofTEXT" datatype="LIST&lt;TEXT&gt;" importance="FIX"><Value>One</Value><Value>Two</Value><Value>Three</Value><Value></Value><Value><EmptyString/></Value></Property><Property id="568765" name="EMPTYTEXT1" datatype="TEXT" importance="FIX"><Value><EmptyString/></Value></Property><Property id="568765" name="EMPTYTEXT2" datatype="TEXT" importance="FIX"><EmptyString/></Property><Property id="568765" name="NULLTEXT1" datatype="TEXT" importance="FIX"></Property><Property id="568765" name="NULLTEXT2" datatype="TEXT" importance="FIX"><Value></Value></Property><Property id="163442" name="date" description="A calendar date. When something took place." datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2017-08-11</Property><Property id="163399" name="vivoness" description="How the experiment was done: IN_VIVO or EX_VIVO." datatype="TEXT" importance="FIX" flag="inheritance:FIX">ex_vivo</Property><Property id="163418" name="species" description="The species of the experimental animal." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Rabbit</Property><Property id="163449" name="ExperimentSeries" description="A collection of [Experiment] records which have the same [aim]." datatype="ExperimentSeries" importance="FIX" flag="inheritance:FIX">163386</Property><Property id="163397" name="MultiRecRecording" datatype="LIST&lt;MultiRecRecording&gt;" importance="FIX" flag="inheritance:FIX"><Value>171242</Value><Value>170651</Value><Value>171701</Value><Value>172074</Value><Value>171408</Value><Value>171687</Value><Value>170791</Value><Value>171115</Value><Value>171893</Value><Value>171237</Value><Value>171309</Value><Value>170899</Value><Value>171048</Value><Value>171077</Value><Value>171723</Value><Value>171085</Value><Value>171812</Value><Value>171829</Value><Value>171669</Value><Value>170695</Value><Value>170875</Value><Value>171751</Value><Value>171412</Value><Value>172204</Value><Value>170997</Value><Value>171490</Value><Value>171504</Value><Value>170977</Value><Value>171895</Value><Value>172233</Value><Value>171261</Value><Value>171318</Value><Value>171014</Value><Value>171132</Value><Value>171575</Value><Value>172217</Value><Value>171638</Value><Value>170656</Value><Value>171927</Value><Value>172232</Value><Value>171864</Value><Value>171564</Value><Value>171090</Value><Value>171633</Value><Value>171456</Value><Value>171755</Value><Value>170641</Value><Value>172144</Value><Value>171872</Value><Value>171619</Value><Value>171180</Value><Value>172019</Value><Value>171193</Value><Value>171069</Value><Value>171643</Value><Value>171789</Value><Value>170785</Value><Value>170904</Value><Value>171130</Value><Value>171098</Value><Value>171241</Value><Value>171796</Value><Value>171776</Value><Value>171175</Value><Value>171112</Value><Value>171514</Value><Value>171854</Value><Value>170962</Value><Value>171818</Value><Value>170745</Value><Value>171149</Value><Value>170639</Value><Value>171508</Value><Value>170800</Value><Value>171141</Value><Value>171414</Value><Value>171325</Value><Value>172168</Value><Value>171184</Value><Value>172083</Value><Value>172029</Value><Value>171556</Value><Value>172195</Value><Value>170789</Value><Value>171300</Value><Value>172230</Value><Value>171720</Value><Value>171341</Value><Value>171937</Value><Value>171673</Value><Value>172106</Value><Value>171281</Value><Value>171897</Value><Value>171108</Value><Value>172014</Value><Value>170867</Value><Value>171531</Value><Value>171674</Value><Value>172077</Value><Value>170944</Value><Value>171228</Value><Value>172207</Value><Value>171039</Value><Value>171778</Value><Value>170794</Value><Value>171646</Value><Value>172027</Value><Value>171279</Value><Value>171618</Value><Value>171233</Value><Value>170811</Value><Value>171357</Value><Value>172180</Value><Value>171585</Value><Value>170774</Value><Value>171625</Value><Value>171310</Value><Value>171855</Value><Value>172084</Value><Value>171395</Value><Value>171955</Value><Value>172216</Value><Value>171705</Value><Value>171312</Value><Value>171659</Value><Value>172192</Value><Value>171157</Value><Value>171978</Value><Value>170707</Value><Value>171250</Value><Value>171929</Value><Value>171709</Value><Value>170898</Value><Value>170723</Value><Value>172060</Value><Value>171693</Value><Value>172036</Value><Value>172162</Value><Value>171460</Value><Value>172065</Value><Value>171174</Value><Value>171461</Value><Value>172093</Value><Value>171200</Value><Value>172007</Value><Value>172102</Value><Value>171368</Value><Value>171761</Value><Value>172157</Value><Value>171354</Value><Value>170698</Value><Value>171254</Value><Value>171740</Value><Value>171303</Value><Value>170874</Value><Value>171248</Value><Value>171698</Value><Value>171191</Value><Value>171948</Value><Value>171920</Value><Value>171319</Value><Value>170649</Value><Value>171731</Value><Value>170643</Value><Value>171007</Value><Value>172186</Value><Value>171831</Value><Value>172128</Value><Value>172154</Value><Value>170841</Value><Value>171530</Value><Value>171142</Value><Value>171857</Value><Value>170982</Value><Value>171852</Value><Value>171574</Value><Value>171136</Value><Value>172107</Value><Value>171819</Value><Value>171746</Value><Value>171036</Value><Value>171331</Value><Value>170682</Value><Value>171779</Value><Value>171747</Value><Value>171383</Value><Value>170748</Value><Value>170691</Value><Value>170820</Value><Value>170829</Value><Value>171888</Value><Value>172098</Value><Value>172199</Value><Value>171290</Value><Value>170935</Value><Value>171056</Value><Value>171131</Value><Value>171415</Value><Value>171105</Value><Value>171135</Value><Value>171371</Value><Value>171640</Value><Value>171534</Value><Value>171012</Value><Value>172047</Value><Value>172081</Value><Value>171666</Value><Value>172089</Value><Value>172063</Value><Value>171449</Value><Value>171159</Value><Value>171808</Value><Value>171932</Value><Value>170664</Value><Value>172000</Value><Value>171220</Value><Value>170955</Value><Value>170740</Value><Value>171350</Value><Value>171528</Value><Value>171081</Value><Value>171199</Value><Value>171711</Value><Value>171446</Value><Value>171607</Value><Value>171292</Value><Value>170762</Value><Value>171896</Value><Value>170810</Value><Value>170990</Value><Value>171332</Value><Value>171080</Value><Value>171075</Value><Value>172130</Value><Value>171525</Value><Value>171993</Value><Value>172091</Value><Value>171924</Value><Value>172153</Value><Value>170661</Value><Value>171190</Value><Value>171021</Value><Value>172158</Value><Value>171980</Value><Value>171480</Value><Value>171598</Value><Value>171827</Value><Value>172166</Value><Value>171392</Value><Value>171512</Value><Value>171008</Value><Value>171610</Value><Value>171692</Value><Value>171908</Value><Value>171733</Value><Value>170866</Value><Value>171100</Value></Property><Property id="163401" name="PulsarProtocolLog" description="A log from Pulsar. This is the generic super type. Sub types will represent the log of a particular protocol." datatype="LIST&lt;PulsarProtocolLog&gt;" importance="FIX" flag="inheritance:FIX"><Value>171750</Value><Value>171019</Value><Value>171765</Value><Value>171269</Value><Value>170700</Value><Value>171665</Value><Value>171496</Value><Value>170954</Value><Value>170780</Value><Value>171313</Value><Value>171202</Value></Property><Property id="163429" name="ACQRawData" description="A file which is the direct/raw output of Acqknowledge." datatype="ACQRawData" importance="FIX" flag="inheritance:FIX">45506</Property><Property id="163456" name="syncMapValuesFiles" description="DESCRIBE ME!" datatype="LIST&lt;FILE&gt;" importance="FIX" flag="inheritance:FIX"><Value>45508</Value><Value>45509</Value><Value>45510</Value><Value>45511</Value><Value>45512</Value><Value>45513</Value><Value>45514</Value><Value>45515</Value><Value>45516</Value><Value>45517</Value><Value>45518</Value><Value>45519</Value><Value>45520</Value><Value>45521</Value><Value>45522</Value><Value>45523</Value><Value>45524</Value><Value>45525</Value><Value>45526</Value><Value>45527</Value><Value>45528</Value><Value>45529</Value><Value>45530</Value><Value>45531</Value><Value>45532</Value></Property></Record>
 """))
+
+testrecord2 = db.Record._from_xml(db.Record(), etree.fromstring(
+"""<Record id="43742">
+    <Permissions>
+      <Permission name="USE:AS_REFERENCE" />
+      <Permission name="USE:AS_DATA_TYPE" />
+      <Permission name="RETRIEVE:ENTITY" />
+      <Permission name="UPDATE:DESCRIPTION" />
+      <Permission name="UPDATE:FILE:ADD" />
+      <Permission name="UPDATE:FILE:MOVE" />
+      <Permission name="RETRIEVE:ACL" />
+      <Permission name="DELETE" />
+      <Permission name="RETRIEVE:OWNER" />
+      <Permission name="UPDATE:PROPERTY:ADD" />
+      <Permission name="UPDATE:ROLE" />
+      <Permission name="UPDATE:PARENT:ADD" />
+      <Permission name="RETRIEVE:FILE" />
+      <Permission name="USE:AS_PROPERTY" />
+      <Permission name="UPDATE:PARENT:REMOVE" />
+      <Permission name="USE:AS_PARENT" />
+      <Permission name="UPDATE:PROPERTY:REMOVE" />
+      <Permission name="UPDATE:NAME" />
+      <Permission name="UPDATE:DATA_TYPE" />
+      <Permission name="UPDATE:VALUE" />
+      <Permission name="RETRIEVE:HISTORY" />
+      <Permission name="EDIT:ACL" />
+      <Permission name="UPDATE:FILE:REMOVE" />
+      <Permission name="UPDATE:QUERY_TEMPLATE_DEFINITION" />
+    </Permissions>
+    <Parent id="43740" name="TestRT" />
+    <Property id="43741" name="TestProp" datatype="TEXT" importance="FIX">
+      a string
+      <Permissions>
+        <Permission name="USE:AS_REFERENCE" />
+        <Permission name="USE:AS_DATA_TYPE" />
+        <Permission name="RETRIEVE:ENTITY" />
+        <Permission name="UPDATE:DESCRIPTION" />
+        <Permission name="UPDATE:FILE:ADD" />
+        <Permission name="UPDATE:FILE:MOVE" />
+        <Permission name="RETRIEVE:ACL" />
+        <Permission name="DELETE" />
+        <Permission name="RETRIEVE:OWNER" />
+        <Permission name="UPDATE:PROPERTY:ADD" />
+        <Permission name="UPDATE:ROLE" />
+        <Permission name="UPDATE:PARENT:ADD" />
+        <Permission name="RETRIEVE:FILE" />
+        <Permission name="USE:AS_PROPERTY" />
+        <Permission name="UPDATE:PARENT:REMOVE" />
+        <Permission name="USE:AS_PARENT" />
+        <Permission name="UPDATE:PROPERTY:REMOVE" />
+        <Permission name="UPDATE:NAME" />
+        <Permission name="UPDATE:DATA_TYPE" />
+        <Permission name="UPDATE:VALUE" />
+        <Permission name="RETRIEVE:HISTORY" />
+        <Permission name="EDIT:ACL" />
+        <Permission name="UPDATE:FILE:REMOVE" />
+        <Permission name="UPDATE:QUERY_TEMPLATE_DEFINITION" />
+      </Permissions>
+    </Property>
+  </Record>"""))
+
+
+def test_null_empty_text_value_1():
+    assert testrecord1.get_property("LISTofTEXT").value == ["One", "Two", "Three", None, ""]
+
+def test_null_empty_text_value_2():
+    assert testrecord1.get_property("NULLTEXT1").value == None
+
+def test_null_empty_text_value_3():
+    assert testrecord1.get_property("NULLTEXT2").value == None
+
+def test_null_empty_text_value_4():
+    assert testrecord1.get_property("EMPTYTEXT1").value == ""
+
+def test_null_empty_text_value_5():
+    assert testrecord1.get_property("EMPTYTEXT2").value == ""
+
+def test_string_value():
+    testrecord2.get_property("TestProp").value == "a string"
diff --git a/unittests/test_datatype.py b/unittests/test_datatype.py
index 5a543100c8617374e0f075abf3adbdb2f8044129..09b9557285f1243b00b97d600cc11ccdfa685ade 100644
--- a/unittests/test_datatype.py
+++ b/unittests/test_datatype.py
@@ -1,5 +1,8 @@
 from caosdb import LIST
+from caosdb import RecordType
 
 
 def test_list():
     assert LIST("RT") == "LIST<RT>"
+    assert LIST(RecordType("bla")) == "LIST<bla>"
+