This test script can be fixed by replacing the following lines of code starting from line 14

for( var t=0; t<items.length; t++ ){
    addLog("Testing type: " + getDataTypeNameFromNodeId( "i=" + UaNodeId.GuessType( items[t].NodeSetting ) ) );

    // first, create our list of items to write, and values.
    var values = [];
    var itemsByType = [];
    for ( var i = 0; i < 5; i++ ) { // i=item
        itemsByType.push( MonitoredItem.Clone( items[t], { IncludeValue: true } ) );
        for ( var v = i; v < 5; v++ ) {
            if ( isNaN( itemsByType[i].Value.Value ) ) UaVariant.SetValueMin( { Item: itemsByType[i] } );
            else UaVariant.Increment( { Item: itemsByType[i] } );
        }
        values.push( itemsByType[i].Value.Value );
    }
}
// second, write the values. Read them back...
WriteHelper.Execute({ NodesToWrite: itemsByType, ReadVerification: false } );
ReadHelper.Execute( { NodesToRead: itemsByType, TimestampsToReturn: TimestampsToReturn.Server, MaxAge: 0 } );

// compare the value received is the same for all values
var firstValue = itemsByType[0].Value.Value;
Assert.ValueInValues( firstValue, values, "Expected a value that was previously written. According to the specification a write should return after the write operation has been completed otherwise the server needs to return a Good_CompletesAsynchronously." );

addLog( "Checking that all returned values match: " + firstValue );
for ( var i = 1; i < ReadHelper.Response.Results.length; i++ ) {
    if ( !firstValue.equals( ReadHelper.Response.Results[i].Value ) ) addError( "Read.Response.Results[" + i + "].Value mismatch." ); result = false;
}//for i...
return ( result );

with the following lines of code

for( var t=0; t<items.length; t++ ){
    addLog("Testing type: " + getDataTypeNameFromNodeId( "i=" + UaNodeId.GuessType( items[t].NodeSetting ) ) );

    // first, create our list of items to write, and values.
    var values = [];
    var itemsByType = [];
    for ( var i = 0; i < 5; i++ ) { // i=item
        itemsByType.push( MonitoredItem.Clone( items[t], { IncludeValue: true } ) );
        for ( var v = i; v < 5; v++ ) {
            if ( isNaN( itemsByType[i].Value.Value ) ) UaVariant.SetValueMin( { Item: itemsByType[i] } );
            else UaVariant.Increment( { Item: itemsByType[i] } );
        }
        values.push( itemsByType[i].Value.Value );
    }

    // second, write the values. Read them back...
    WriteHelper.Execute({ NodesToWrite: itemsByType, ReadVerification: false } );
    ReadHelper.Execute( { NodesToRead: itemsByType, TimestampsToReturn: TimestampsToReturn.Server, MaxAge: 0 } );

    // compare the value received is the same for all values
    var firstValue = itemsByType[0].Value.Value;
    Assert.ValueInValues( firstValue, values, "Expected a value that was previously written. According to the specification a write should return after the write operation has been completed otherwise the server needs to return a Good_CompletesAsynchronously." );

    addLog( "Checking that all returned values match: " + firstValue );
    for ( var i = 1; i < ReadHelper.Response.Results.length; i++ ) {
        if ( !firstValue.equals( ReadHelper.Response.Results[i].Value ) ) addError( "Read.Response.Results[" + i + "].Value mismatch." ); result = false;
    }//for i...            
}        
return ( result );