diff --git a/conanfile.txt b/conanfile.txt
index 6e14d4783d406fd06def9dcd692db8622712f9d3..048f038956408610ddfa02e4d3b780b990f2d657 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -1,5 +1,5 @@
 [requires]
-caosdb/0.0.4
+caosdb/0.0.5
 gtest/1.11.0
 
 [generators]
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 81f1fbe0be5d70c05c6b395ab56f38c922dae004..49dde42cf0d3a578f9bd1f50cd99b1c88ccf3fcb 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -24,6 +24,7 @@
 set(test_cases
     test_connection
     test_transaction
+    test_ccaosdb
     )
 
 #######################################################
diff --git a/test/test_ccaosdb.cpp b/test/test_ccaosdb.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7039a6096af1e7337209fafa5c5d8705edea9726
--- /dev/null
+++ b/test/test_ccaosdb.cpp
@@ -0,0 +1,44 @@
+/*
+ * This file is a part of the CaosDB Project.
+ *
+ * Copyright (C) 2021 Timm Fitschen <t.fitschen@indiscale.com>
+ * Copyright (C) 2021 IndiScale GmbH <info@indiscale.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <memory>            // for allocator, unique_ptr
+#include "ccaosdb.h"         // for caosdb_connection_create_connection
+#include "gtest/gtest.h"     // for Test, SuiteApiResolver, TestInfo, TEST
+#include "test_connection.h" // for create_test_connection_config
+
+TEST(test_ccaosdb, connection_ssl_authentication_success) {
+
+  caosdb_connection_connection_configuration config;
+  auto wrapped = caosdb::connection::create_test_connection_config();
+  config.wrapped_connection_configuration = wrapped.get();
+
+  caosdb_connection_connection connection;
+  caosdb_connection_create_connection(&connection, &config);
+
+  caosdb_info_version_info version_info;
+  caosdb_connection_get_version_info(&version_info, &connection);
+
+  auto major = caosdb_constants_COMPATIBLE_SERVER_VERSION_MAJOR();
+  auto minor = caosdb_constants_COMPATIBLE_SERVER_VERSION_MINOR();
+  const auto *const pre_release = caosdb_constants_COMPATIBLE_SERVER_VERSION_PRE_RELEASE();
+
+  EXPECT_EQ(major, version_info.major);
+  EXPECT_EQ(minor, version_info.minor);
+  EXPECT_STREQ(pre_release, version_info.pre_release);
+}
diff --git a/test/test_connection.cpp b/test/test_connection.cpp
index fddc26b97e23f3fbd1c658ee6a93899c93f1ebe5..f09d6b071802d26b21de1db46e23a2582ec86db1 100644
--- a/test/test_connection.cpp
+++ b/test/test_connection.cpp
@@ -23,13 +23,14 @@
 #include <memory>                  // for make_shared, allocator, shared_ptr
 #include <string>                  // for string
 #include "caosdb/authentication.h" // for PlainPasswordAuthenticator
-#include "caosdb/connection.h"     // for InsecureCaosDBConnectionConfig
+#include "caosdb/connection.h"     // for InsecureConnectionConfig
 #include "caosdb/exceptions.h"     // for AuthenticationError, ConnectionError
 #include "caosdb/info.h"           // for VersionInfo
-#include "caosdb/utils.h"          // for get_env_var
+#include "caosdb/utility.h"        // for get_env_var
 #include "gtest/gtest_pred_impl.h" // for Test, TEST, EXPECT_EQ, EXPECT_THROW
 #include "caosdb_test_utility.h"
 #include "test_connection.h"
+#include "caosdb/constants.h"
 
 namespace caosdb::connection {
 using caosdb::authentication::PlainPasswordAuthenticator;
@@ -38,82 +39,81 @@ using caosdb::exceptions::ConnectionError;
 
 TEST(test_connection, config_somehost_25323) {
   auto port = 25323;
-  const auto *pHost = "somehost";
-  auto config = std::make_unique<InsecureCaosDBConnectionConfig>(pHost, port);
+  const auto *host = "somehost";
+  auto config = InsecureConnectionConfig(host, port);
 
-  EXPECT_EQ(pHost, config->getHost());
-  EXPECT_EQ(port, config->getPort());
+  EXPECT_EQ(host, config.GetHost());
+  EXPECT_EQ(port, config.GetPort());
 }
 
 TEST(test_connection, connect_somehost_42347_fails) {
   auto port = 42347;
-  const auto *pHost = "somehost";
-  auto config = std::make_shared<InsecureCaosDBConnectionConfig>(pHost, port);
-  CaosDBConnection connection(config);
+  const auto *host = "somehost";
+  auto config = InsecureConnectionConfig(host, port);
+  Connection connection(config);
 
   EXPECT_THROW(connection.GetVersionInfo(), ConnectionError);
 }
 
 TEST(test_connection, connection_insecure_authentication_error_anonymous) {
-  auto port_str =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTP", "8080");
+  const auto *port_str =
+    caosdb::utility::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTP", "8080");
   auto port = std::stoi(port_str);
-  const auto host =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_HOST", "localhost");
+  const auto *const host =
+    caosdb::utility::get_env_var("CAOSDB_SERVER_HOST", "localhost");
 
-  auto config = std::make_shared<InsecureCaosDBConnectionConfig>(host, port);
-  auto connection = CaosDBConnection(config);
+  auto config = InsecureConnectionConfig(host, port);
+  auto connection = Connection(config);
 
   EXPECT_THROW(connection.GetVersionInfo(), AuthenticationError);
 }
 
 TEST(test_connection, connection_ssl_authentication_error_anonymous) {
-  auto port_str =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTPS", "8443");
+  const auto *port_str =
+    caosdb::utility::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTPS", "8443");
   auto port = std::stoi(port_str);
-  const auto host =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_HOST", "localhost");
+  const auto *const host =
+    caosdb::utility::get_env_var("CAOSDB_SERVER_HOST", "localhost");
   const auto path =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_CERT", std::string());
+    caosdb::utility::get_env_var("CAOSDB_SERVER_CERT", std::string());
 
-  auto ssloptions = std::make_shared<PemFileCACertProvider>(path);
-  auto config =
-    std::make_shared<SslCaosDBConnectionConfig>(host, port, ssloptions);
-  auto connection = CaosDBConnection(config);
+  auto cert = PemFileCertificateProvider(path);
+  auto config = TlsConnectionConfig(host, port, cert);
+  auto connection = Connection(config);
 
   EXPECT_THROW_MESSAGE(connection.GetVersionInfo(), AuthenticationError,
                        "Please login.");
 }
 
 TEST(test_connection, connection_ssl_authentication_error_wrong_credentials) {
-  auto port_str =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTPS", "8443");
+  const auto *port_str =
+    caosdb::utility::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTPS", "8443");
   auto port = std::stoi(port_str);
-  const auto host =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_HOST", "localhost");
+  const auto *const host =
+    caosdb::utility::get_env_var("CAOSDB_SERVER_HOST", "localhost");
   const auto path =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_CERT", std::string());
+    caosdb::utility::get_env_var("CAOSDB_SERVER_CERT", std::string());
   const auto *const user = "not-a-user-23461237";
   const auto *const password = "very-c-cred";
 
-  auto auth = std::make_shared<PlainPasswordAuthenticator>(user, password);
-  auto ssloptions = std::make_shared<PemFileCACertProvider>(path);
-  auto config =
-    std::make_shared<SslCaosDBConnectionConfig>(host, port, ssloptions, auth);
-  auto connection = CaosDBConnection(config);
+  auto auth = PlainPasswordAuthenticator(user, password);
+  auto cert = PemFileCertificateProvider(path);
+  auto config = TlsConnectionConfig(host, port, cert, auth);
+  auto connection = Connection(config);
 
   EXPECT_THROW_MESSAGE(connection.GetVersionInfo(), AuthenticationError,
                        "Authentication failed. Username or password wrong.");
 }
 
 TEST(test_connection, connection_ssl_authentication_success) {
-  const auto &pConnection = get_test_connection();
+  const auto& connection = get_test_connection();
 
-  auto major = 0;
-  auto minor = 5;
-  const auto *const pre_release = "GRPC004";
+  auto major = caosdb::COMPATIBLE_SERVER_VERSION_MAJOR;
+  auto minor = caosdb::COMPATIBLE_SERVER_VERSION_MINOR;
+  const auto pre_release =
+    std::string(caosdb::COMPATIBLE_SERVER_VERSION_PRE_RELEASE);
 
-  auto v_info = pConnection->GetVersionInfo();
+  auto v_info = connection->GetVersionInfo();
   EXPECT_EQ(major, v_info->GetMajor());
   EXPECT_EQ(minor, v_info->GetMinor());
   EXPECT_EQ(pre_release, v_info->GetPreRelease());
diff --git a/test/test_connection.h b/test/test_connection.h
index 9c60f4526761b726896e44e125973e853918faf8..5e3cf5cb556e3b28134600ebd5dd9f3e5cd7de51 100644
--- a/test/test_connection.h
+++ b/test/test_connection.h
@@ -21,39 +21,44 @@
 #include <memory>                  // for allocator, make_shared, shared_ptr
 #include <string>                  // for stoi, string
 #include "caosdb/authentication.h" // for PlainPasswordAuthenticator
-#include "caosdb/connection.h"     // for PemFileCACertProvider, SslCaosDBC...
-#include "caosdb/utils.h"          // for get_env_var
+#include "caosdb/connection.h" // for PemFileCertificateProvider, TlsCaosDBC...
+#include "caosdb/utility.h"    // for get_env_var
 
 namespace caosdb::connection {
 using caosdb::authentication::PlainPasswordAuthenticator;
 
-/**
- * Return a fresh CaosDBConnection pointer. The caller has the ownership.
- */
-inline auto create_test_connection() -> CaosDBConnection * {
+inline auto create_test_connection_config()
+  -> std::unique_ptr<TlsConnectionConfig> {
   auto port_str =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTPS", "8443");
+    caosdb::utility::get_env_var("CAOSDB_SERVER_GRPC_PORT_HTTPS", "8443");
   auto port = std::stoi(port_str);
   const auto host =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_HOST", "localhost");
+    caosdb::utility::get_env_var("CAOSDB_SERVER_HOST", "localhost");
   const auto path =
-    caosdb::utils::get_env_var("CAOSDB_SERVER_CERT", std::string());
-  const auto user = caosdb::utils::get_env_var("CAOSDB_USER", "admin");
-  const auto password = caosdb::utils::get_env_var("CAOSDB_PASSWORD", "caosdb");
+    caosdb::utility::get_env_var("CAOSDB_SERVER_CERT", std::string());
+  const auto user = caosdb::utility::get_env_var("CAOSDB_USER", "admin");
+  const auto password =
+    caosdb::utility::get_env_var("CAOSDB_PASSWORD", "caosdb");
+
+  auto auth = PlainPasswordAuthenticator(user, password);
+  auto cert = PemFileCertificateProvider(path);
+  return std::make_unique<TlsConnectionConfig>(host, port, cert, auth);
+}
 
-  auto auth = std::make_shared<PlainPasswordAuthenticator>(user, password);
-  auto ssloptions = std::make_shared<PemFileCACertProvider>(path);
-  auto config =
-    std::make_shared<SslCaosDBConnectionConfig>(host, port, ssloptions, auth);
-  return new CaosDBConnection(config);
+/**
+ * Return a fresh Connection pointer. The caller has the ownership.
+ */
+inline auto create_test_connection() -> std::unique_ptr<Connection> {
+  auto config = create_test_connection_config();
+  return std::make_unique<Connection>(*(config.get()));
 };
 
 /**
- * Singleton which holds a single global CaosDBConnection
+ * Singleton which holds a single global Connection
  */
 class ConnectionProvider {
 private:
-  std::shared_ptr<CaosDBConnection> connection;
+  std::shared_ptr<Connection> connection;
   ConnectionProvider() : connection(create_test_connection()){};
 
 public:
@@ -61,7 +66,7 @@ public:
     static ConnectionProvider instance;
     return instance;
   };
-  inline auto GetConnection() -> std::shared_ptr<CaosDBConnection> & {
+  inline auto GetConnection() -> std::shared_ptr<Connection> & {
     return this->connection;
   }
 
@@ -72,7 +77,7 @@ public:
 /**
  * Return a connection for testing purposes.
  */
-inline auto get_test_connection() -> const std::shared_ptr<CaosDBConnection> & {
+inline auto get_test_connection() -> const std::shared_ptr<Connection> & {
   return ConnectionProvider::GetInstance().GetConnection();
 };