diff --git a/tests/utils/io/test_data_reader.py b/tests/utils/io/test_data_reader.py
index c55badc..e1724b0 100644
--- a/tests/utils/io/test_data_reader.py
+++ b/tests/utils/io/test_data_reader.py
@@ -33,6 +33,50 @@
                   'xsi:schemaLocation': 'http://www.cdisc.org/ns/odm/v1.3 '
                                         'schema/odm/ODM1-3-1.xsd'}}
          ),
+        ('<string>Hello World</string>', {"string": "Hello World"}),
+        ('<object><a>b</a><c>d</c></object>', {"object": {"a": "b", "c": "d"}}),
+        ('<number>123</number>', {"number": 123}),
+        ('<number>-123</number>', {"number": -123}),
+        ('<number>123.4</number>', {"number": 123.4}),
+        ('<null></null>', {"null": None}),  # empty tag
+        ('<null />', {"null": None}),  # empty tag
+        ('<null xsi:nil="true"/>', {"null": None}),  # explicit null
+        ('<color>gold</color>', {"color": "gold"}),
+        ('<boolean>true</boolean>', {"boolean": True}),
+        ('<boolean>false</boolean>', {"boolean": False}),
+        ('<array><item>1</item><item>2</item><item>3</item></array>', {"array": {"item": [1, 2, 3]}}),
+        ('<root>'
+         '<array>'
+         '<item>1</item>'
+         '<item>2</item>'
+         '<item>3</item>'
+         '</array>'
+         '<boolean>true</boolean>'
+         '<color>gold</color>'
+         '<number>123</number>'
+         '<object>'
+         '<a>b</a>'
+         '<c>d</c>'
+         '</object>'
+         '<string>Hello World</string>'
+         '</root>',
+         {
+             "root":{
+                 "array": {
+                     "item": [1, 2, 3]
+                 },
+                 "boolean": True,
+                 "color": "gold",
+                 "number": 123,
+                 "object": {
+                     "a": "b",
+                     "c": "d"
+                 },
+                 "string": "Hello World"
+             }
+         }),
+        ('<ItemData ItemOID="redcap_survey_identifier" Value=""/>', {"ItemData": {"ItemOID": "redcap_survey_identifier", "Value": ""}}),
+
     ]
 )
 def test_read_xml(inp, expected):