diff --git a/ecal/core/src/readwrite/shm/ecal_writer_shm.cpp b/ecal/core/src/readwrite/shm/ecal_writer_shm.cpp
index 7af067b220..6e0ea78b79 100644
--- a/ecal/core/src/readwrite/shm/ecal_writer_shm.cpp
+++ b/ecal/core/src/readwrite/shm/ecal_writer_shm.cpp
@@ -32,7 +32,7 @@ namespace eCAL
 {
   const std::string CDataWriterSHM::m_memfile_base_name = "ecal_";
 
-  CDataWriterSHM::CDataWriterSHM(const std::string& host_name_, const std::string& topic_name_, const std::string& topic_id_, const CPublisher::SHMConfig& shm_config_) :
+  CDataWriterSHM::CDataWriterSHM(const std::string& /*host_name_*/, const std::string& topic_name_, const std::string& /*topic_id_*/, const CPublisher::SHMConfig& shm_config_) :
     m_config(shm_config_)
   {
     m_topic_name = topic_name_;
@@ -69,7 +69,7 @@ namespace eCAL
     }
 
     // prepare memfile attributes
-    SSyncMemoryFileAttr memory_file_attr;
+    SSyncMemoryFileAttr memory_file_attr = {};
     memory_file_attr.min_size        = m_config.memfile_min_size_bytes;
     memory_file_attr.reserve         = m_config.memfile_reserve_percent;
     memory_file_attr.timeout_open_ms = PUB_MEMFILE_OPEN_TO;
diff --git a/ecal/tests/cpp/pubsub_test/src/pubsub_test.cpp b/ecal/tests/cpp/pubsub_test/src/pubsub_test.cpp
index e169dd9c38..a41669fa86 100644
--- a/ecal/tests/cpp/pubsub_test/src/pubsub_test.cpp
+++ b/ecal/tests/cpp/pubsub_test/src/pubsub_test.cpp
@@ -509,7 +509,7 @@ TEST(core_cpp_pubsub, DynamicCreate)
 TEST(core_cpp_pubsub, ZeroPayloadMessageSHM)
 {
   // default send string
-  std::string send_s;
+  const std::string send_s;
 
   // initialize eCAL API
   eCAL::Initialize(0, nullptr, "pubsub_test");
@@ -649,7 +649,7 @@ TEST(core_cpp_pubsub, MultipleSendsSHM)
   // let's match them
   eCAL::Process::SleepMS(2 * CMN_REGISTRATION_REFRESH);
   long long timestamp = 1;
-  for (const auto elem : send_vector)
+  for (const auto& elem : send_vector)
   {
     pub.Send(elem, timestamp);
     eCAL::Process::SleepMS(DATA_FLOW_TIME);
@@ -671,9 +671,9 @@ TEST(core_cpp_pubsub, MultipleSendsSHM)
 TEST(core_cpp_pubsub, MultipleSendsUDP)
 {
   // default send string
-  std::vector<std::string> send_vector{ "this", "is", "a", "", "testtest" };
+  const std::vector<std::string> send_vector{ "this", "is", "a", "", "testtest" };
   std::string last_received_msg;
-  long long   last_received_timestamp;
+  long long   last_received_timestamp(0);
 
   // initialize eCAL API
   eCAL::Initialize(0, nullptr, "pubsub_test");
@@ -705,7 +705,7 @@ TEST(core_cpp_pubsub, MultipleSendsUDP)
   // let's match them
   eCAL::Process::SleepMS(2 * CMN_REGISTRATION_REFRESH);
   long long timestamp = 1;
-  for (const auto elem : send_vector)
+  for (const auto& elem : send_vector)
   {
     pub.Send(elem, timestamp);
     eCAL::Process::SleepMS(DATA_FLOW_TIME);