diff --git a/tests/issues/src/main/resources/schema.xsd b/tests/issues/src/main/resources/schema.xsd
index 6c87809f..1e47c4ee 100644
--- a/tests/issues/src/main/resources/schema.xsd
+++ b/tests/issues/src/main/resources/schema.xsd
@@ -269,4 +269,8 @@
 		</xs:sequence>
 	</xs:complexType>
 
+	<xs:complexType name="issueGH37Type">
+		<xs:attribute name="testBoolean" type="xs:boolean" default="true"/>
+	</xs:complexType>
+
 </xs:schema>
\ No newline at end of file