diff --git a/.github/workflows/debug.yml b/.github/workflows/debug.yml
index 0224bd077..ccea82a38 100644
--- a/.github/workflows/debug.yml
+++ b/.github/workflows/debug.yml
@@ -88,7 +88,7 @@ jobs:
       ##########################################################################
       - name: community server | Unit tests
         run: |
-          docker run -v ~/coverage:/var/www/cakephp/webroot/coverage gradido/community_server:test "./vendor/bin/phpunit --coverage-html ./webroot/coverage"
+          docker run -v ~/coverage:/var/www/cakephp/webroot/coverage gradido/community_server:test ./vendor/bin/phpunit --coverage-html ./webroot/coverage
           cp -r ~/coverage ./coverage
       ##########################################################################
       # COVERAGE CHECK BACKEND COMMUNITY-SERVER ####################################
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1716e149b..cc0b1f37d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -305,7 +305,7 @@ jobs:
       ##########################################################################
       - name: community server | Unit tests
         run: |
-          docker run -v ~/coverage:/var/www/cakephp/webroot/coverage gradido/community_server:test "./vendor/bin/phpunit --coverage-html ./webroot/coverage"
+          docker run -v ~/coverage:/var/www/cakephp/webroot/coverage gradido/community_server:test ./vendor/bin/phpunit --coverage-html ./webroot/coverage
           cp -r ~/coverage ./coverage
       ##########################################################################
       # COVERAGE CHECK BACKEND COMMUNITY-SERVER ####################################
diff --git a/community_server/Dockerfile b/community_server/Dockerfile
index 8129d581d..edbd33c47 100644
--- a/community_server/Dockerfile
+++ b/community_server/Dockerfile
@@ -1,8 +1,8 @@
-FROM phpdockerio/php74-fpm
+FROM phpdockerio/php74-fpm as community_server
 
 # install php fpm 
 RUN apt-get update \
-    && apt-get -y --no-install-recommends install curl unzip php7.4-curl php7.4-fpm php7.4-mbstring php7.4-intl php7.4-xml php7.4-pdo php7.4-mysql \
+    && apt-get -y --no-install-recommends install curl unzip php7.4-curl php7.4-fpm php7.4-mbstring php7.4-intl php7.4-xml php7.4-pdo php7.4-mysql php7.4-xdebug \
     && apt-get clean; rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/doc/*
 
 WORKDIR /var/www/cakephp
@@ -14,4 +14,14 @@ RUN composer update
 RUN composer dump-autoload
 
 
+#########  special for code coverage and testing
+FROM community_server as test
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install php7.4-xdebug \
+    && apt-get clean; rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/doc/*
+
+WORKDIR /var/www/cakephp
+ENV XDEBUG_MODE=coverage
+
 
diff --git a/configs/community_server/app.php b/configs/community_server/app.php
index 2dafaf554..5bbdcdc4c 100644
--- a/configs/community_server/app.php
+++ b/configs/community_server/app.php
@@ -304,7 +304,7 @@ return [
             'className' => Connection::class,
             'driver' => Mysql::class,
             'persistent' => false,
-            'host' => 'localhost',
+            'host' => 'mariadb',
             //'port' => 'non_standard_port_number',
             'username' => 'root',
             'password' => '',
diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index 1311fe894..e4bc82a14 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -47,6 +47,7 @@ services:
   community-server:
     build: 
       context: .
+      target: community_server
       dockerfile: ./community_server/Dockerfile
     environment:
       - DB_PASSWORD=''
diff --git a/docker-compose.yml b/docker-compose.yml
index 59e617d71..7e9ee3bc1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -89,6 +89,7 @@ services:
   community-server:
     build: 
       context: .
+      target: community_server
       dockerfile: ./community_server/Dockerfile
     environment:
       - DB_PASSWORD=''
diff --git a/login_server/src/cpp/test/main.cpp b/login_server/src/cpp/test/main.cpp
index 7df377455..f1bbe196b 100644
--- a/login_server/src/cpp/test/main.cpp
+++ b/login_server/src/cpp/test/main.cpp
@@ -82,11 +82,17 @@ int load(int argc, char* argv[]) {
 	auto conn = ConnectionManager::getInstance();
 	//conn->setConnection()
 	//printf("try connect login server mysql db\n");
+	bool connected = false;
 	try {
-		conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_LOGIN_SERVER);
+		if(conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_LOGIN_SERVER)) {
+			connected = true;
+		}
 	}
 	catch (Poco::Exception& ex) {
 		// maybe we in docker environment and db needs some time to start up
+		printf("Poco Exception by connecting to db: %s, let's try again\n", ex.displayText().data());
+	}
+	if(!connected) {
 		// let's wait 10 seconds
 		int count = 10;
 		while (count > 0) {
@@ -94,15 +100,25 @@ int load(int argc, char* argv[]) {
 			count--;
 			Poco::Thread::sleep(1000);
 		}
-		conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_LOGIN_SERVER);
+		try {
+			if(conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_LOGIN_SERVER)) {
+				connected = true;
+			}
+		} catch(Poco::Exception& ex) {
+			printf("Poco Exception by connecting to db: %s, let's wait another 10 seconds\n", ex.displayText().data());
+		}
 	}
-	std::clog << "Wait another 10 seconds for mysql/mariadb" << std::endl;
-	Poco::Thread::sleep(10000);
-	try {
-        conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_LOGIN_SERVER);
-    } catch(Poco::Exception& ex) {
-        printf("Poco Exception by connecting to db: %s\n", ex.displayText().data());
-    }
+	if(!connected) {
+		Poco::Thread::sleep(10000);
+		try {
+			conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_LOGIN_SERVER);
+		} catch(Poco::Exception& ex) {
+			printf("Poco Exception by connecting to db: %s, exit\n", ex.displayText().data());
+			return -4;
+		}
+	}
+	
+	
 	//printf("try connect php server mysql \n");
 	//conn->setConnectionsFromConfig(*test_config, CONNECTION_MYSQL_PHP_SERVER);
 
@@ -183,9 +199,13 @@ void ende()
 
 int main(int argc, char** argv)
 {
-	if (load(argc, argv) < 0) {
-		printf("early exit\n");
-		return -42;
+	try {
+		if (load(argc, argv) < 0) {
+			printf("early exit\n");
+			return -42;
+		}
+	} catch(std::exception& ex) {
+		printf("no catched exception while loading: %s\n", ex.what());
 	}
 	run();
 	ende();