Could you please provide any code with which we can reproduce this problem?

(I hope this is rendered readably by JIRA)

phpunit.xml (in tests/):

<?xml version="1.0" encoding="utf-8"?>
./../application../application../application/Bootstrap.php../application/controllers/ErrorController.php

in application.ini:

---8<--- snip ---8<---
[production]
phpSettings.display_startup_errors = 0
phpSettings.display_errors = 0
phpSettings.date.default.timezone = "Europe/Vienna"
includePaths.library = APPLICATION_PATH "/../library"
bootstrap.path = APPLICATION_PATH "/Bootstrap.php"
bootstrap.class = "Bootstrap"
resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers"
resources.layout.layoutPath = APPLICATION_PATH "/layouts/scripts"
resources.view[] =
---8<--- snip ---8<---

---8<--- snip ---8<---
[testing : production]
phpSettings.display_startup_errors = 1
phpSettings.display_errors = 1
resources.db.adapter = "Pdo_Sqlite"
resources.db.params.dbname = APPLICATION_PATH "/../data/db/sitedata-testing.db"

[development : production]
phpSettings.display_startup_errors = 1
phpSettings.display_errors = 1
;resources.db.adapter = "Pdo_Mysql"
;resources.db.params.host = "localhost"
---8<--- snip ---8<---

in tests/TechnologyMapperTest.php

<?php
class ModelTechnologyMapperTest extends ControllerTestCase {

    /**
     * @var Default_Model_TechnologyMapper
     */
    protected $_mapper;

    public function setUp() {
        $this->_mapper = new Default_Model_TechnologyMapper();
    }

    public function tearDown() {
        $this->_mapper->getDbTable()
            ->delete(array("order_index = ?" => -101));
        $this->_mapper->getDbTable()
            ->delete(array("order_index = ?" => -100));
    }

    public function testDbTableProperty() {
        $this->assertClassHasAttribute("_dbTable", "Default_Model_TechnologyMapper");
    }
---8<--- snip ---8<---

in application/models/TechnologyMapper.php:

<?php
class Default_Model_TechnologyMapper {
    /**
     * The database table object
     *
     * @var Default_Model_DbTable_Technologies
     */
    protected $_dbTable;

    /**
     * Set the table object
     * @param $dbTable
     * @return Default_Model_TechnologyMapper
     */
    public function setDbTable($dbTable) {
        if (is_string ( $dbTable )) {
            $dbTable = new $dbTable ( );
        }
        if (! $dbTable instanceof Zend_Db_Table_Abstract) {
            throw new Exception ( "Invalid table data gateway provider" );
        }
        $this->_dbTable = $dbTable;
        return $this;
    }

    /**
     * Get the table object
     * @return Default_Model_DbTable_Technologies
     */
    public function getDbTable() {
        if (null === $this->_dbTable) {
            $this->setDbTable ( "Default_Model_DbTable_Technologies" );
        }
        return $this->_dbTable;
    }

    /**
     * Save a technology
     * @param Default_Model_Technology $tech
     * @return Default_Model_TechnologyMapper
     */
    public function save(Default_Model_Technology &$tech) {
        $data = array(
            "id"            => $tech->getId(),
            "name"          => $tech->getName(),
            "class_name"    => $tech->getClassName(),
            "order_index"   => $tech->getOrderIndex(),
        );
        if (null === $tech->getId()) {
            unset($data["id"]);
            $data["created"] = time();
            $tech->setId($this->getDbTable()->insert($data));
        }
        else {
            $data["modified"] = time();
            $this->getDbTable()->update($data, array("id = ?" => $data["id"]));
        }
        return $this;
    }

    public function fetchAll() {
        $resultSet = $this->getDbTable()
            ->select()
            ->order(array("order_index", "name"))
            ->query()
            ->fetchAll();
        $entries = array();
        foreach ($resultSet as $row) {
            $entry = new Default_Model_Technology();
            $entry->setId($row["id"])
                ->setName($row["name"])
                ->setClassName($row["class_name"])
                ->setOrderIndex($row["order_index"]);
            $entries[] = $entry;
        }
        return $entries;
    }
}

in application/models/DbTable/Technologies.php:

<?php
class Default_Model_DbTable_Technologies extends Zend_Db_Table_Abstract {
    /**
     * table name
     * @var strings
     */
    protected $_name = "technologies";
}

tests/application/ControllerTestCase.php:

<?php
class ControllerTestCase extends Zend_Test_PHPUnit_ControllerTestCase {

    /**
     * @var Zend_Application
     */
    protected $_application;

    /**
     * Prepares the environment before running a test.
     */
    public function setUp() {
        $this->bootstrap = array($this, "appBootstrap" );
        parent::setUp();
    }

    public function appBootstrap() {
        $this->_application = new Zend_Application( APPLICATION_ENV, APPLICATION_PATH . "/configs/application.ini" );
        $this->_application->bootstrap();
    }
}

Oh, and the tests/application/bootstrap.php file for unit testing:

<?php
error_reporting(E_ALL | E_STRICT);
date_default_timezone_set("Europe/Vienna");

defined("APPLICATION_PATH")
    || define("APPLICATION_PATH", realpath(dirname(__FILE__) . "/../../application"));
defined("APPLICATION_ENV")
    || define("APPLICATION_ENV", (getenv("APPLICATION_ENV") ? getenv("APPLICATION_ENV") : "testing"));
set_include_path(implode(PATH_SEPARATOR, array(
    get_include_path(),
    realpath(APPLICATION_PATH . "/../library"),
    "/usr/local/share/pear",
)));
require_once 'Zend/Loader/Autoloader.php';
require_once 'Zend/Application/Module/Autoloader.php';
/**
 * @var Zend_Application_Module_Autoloader
 */
$autoloader = new Zend_Application_Module_Autoloader(array(
    "namespace" => "Default",
    "basePath" => APPLICATION_PATH
));
require_once 'ControllerTestCase.php';

@Constantin Ehrenstein

In class ModelTechnologyMapperTest (tests/TechnologyMapperTest.php). Missing, parent::setUp().

<?php
class ModelTechnologyMapperTest extends ControllerTestCase
{

    /**
     * @var Default_Model_TechnologyMapper
     */
    protected $_mapper;

    public function setUp() {
        parent::setUp(); // add
        $this->_mapper = new Default_Model_TechnologyMapper();
    }

    public function tearDown() {
        $this->_mapper->getDbTable()
            ->delete(array("order_index = ?" => -101));
        $this->_mapper->getDbTable()
            ->delete(array("order_index = ?" => -100));
    }

    public function testDbTableProperty() {
        $this->assertClassHasAttribute("_dbTable", "Default_Model_TechnologyMapper");
    }
}