diff --git a/plugins/generic/enumeration.py b/plugins/generic/enumeration.py
index a36036baa..51ac9c0b8 100644
--- a/plugins/generic/enumeration.py
+++ b/plugins/generic/enumeration.py
@@ -142,7 +142,7 @@ class Enumeration:
 
         if Backend.getIdentifiedDbms() == DBMS.MYSQL:
             self.getCurrentUser()
-            query = queries[Backend.getIdentifiedDbms()].is_dba.query % kb.data.currentUser.split("@")[0]
+            query = queries[Backend.getIdentifiedDbms()].is_dba.query % (kb.data.currentUser.split("@")[0] if kb.data.currentUser else None)
         elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE) and user is not None:
             query = queries[Backend.getIdentifiedDbms()].is_dba.query2 % user
         else:
diff --git a/xml/livetests.xml b/xml/livetests.xml
index e38dc9837..2021475ef 100644
--- a/xml/livetests.xml
+++ b/xml/livetests.xml
@@ -323,7 +323,7 @@
     </case>
     <case name="MSSQL (--technique=1 --is-dba --banner --current-user --current-db --dbs --tables -D testdb -T users --columns --dump --threads=4)">
         <switches>
-            <url value="http://windowsenv/sqlmap/mssql/iis/get_int.asp?id=1"/>
+            <url value="http://windowsdev/sqlmap/mssql/iis/get_int.asp?id=1"/>
             <isDba value="True"/>
             <technique value="1"/>
             <getBanner value="True"/>
@@ -350,7 +350,7 @@
     </case>
     <case name="MSSQL (--technique=2 --is-dba --banner --current-user --current-db --dbs --tables -D testdb -T users --columns --dump)">
         <switches>
-            <url value="http://windowsenv/sqlmap/mssql/iis/get_int.asp?id=1"/>
+            <url value="http://windowsdev/sqlmap/mssql/iis/get_int.asp?id=1"/>
             <isDba value="True"/>
             <technique value="2"/>
             <getBanner value="True"/>
@@ -376,7 +376,7 @@
     </case>
     <case name="MSSQL (--technique=3 --is-dba --banner --current-user --current-db --dbs --tables -D testdb -T users --columns --dump)">
         <switches>
-            <url value="http://windowsenv/sqlmap/mssql/iis/get_int.asp?id=1"/>
+            <url value="http://windowsdev/sqlmap/mssql/iis/get_int.asp?id=1"/>
             <isDba value="True"/>
             <technique value="3"/>
             <getBanner value="True"/>
@@ -402,7 +402,7 @@
     </case>
     <case name="MSSQL partial union (--technique=3 --is-dba --banner --current-user --current-db --dbs --tables -D testdb -T users --columns --dump)">
         <switches>
-            <url value="http://windowsenv/sqlmap/mssql/iis/get_int_partialunion.asp?id=1"/>
+            <url value="http://windowsdev/sqlmap/mssql/iis/get_int_partialunion.asp?id=1"/>
             <isDba value="True"/>
             <technique value="3"/>
             <getBanner value="True"/>