diff --git a/api/tests/server/test_observe_operation.cc b/api/tests/server/test_observe_operation.cc
index 0135a57..dba9d56 100644
--- a/api/tests/server/test_observe_operation.cc
+++ b/api/tests/server/test_observe_operation.cc
@@ -319,7 +319,7 @@ TEST_F(TestObserveWithConnectedSession, AwaServerObserveOperation_Perform_handle
     {
         int count;
 
-        CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
+        explicit CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
 
         void callbackHandler(const AwaChangeSet * changeSet)
         {
@@ -418,7 +418,7 @@ TEST_F(TestObserveWithConnectedSession, AwaServerObserveOperation_Perform_handle
     {
         int count;
 
-        CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
+        explicit CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
 
         void callbackHandler(const AwaChangeSet * changeSet)
         {
@@ -586,7 +586,7 @@ TEST_F(TestObserveWithConnectedSession, AwaServerObserveOperation_Perform_handle
     {
         int count;
 
-        CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
+        explicit CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
 
         void callbackHandler(const AwaChangeSet * changeSet)
         {
@@ -905,7 +905,7 @@ TEST_F(TestObserveWithConnectedSession, AwaServerObserveOperation_Perform_honour
     {
         int count;
 
-        CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
+        explicit CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
 
         void callbackHandler(const AwaChangeSet * changeSet)
         {
@@ -954,7 +954,7 @@ TEST_F(TestObserveWithConnectedSession, AwaServerObserveOperation_Perform_cancel
     {
         int count;
 
-        CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
+        explicit CallbackHandler1(AwaServerSession * session)  : ObserveWaitCondition(session), count(0) {};
 
         virtual void callbackHandler(const AwaChangeSet * changeSet)
         {
diff --git a/api/tests/support/process.cc b/api/tests/support/process.cc
index fd5e903..7526c57 100644
--- a/api/tests/support/process.cc
+++ b/api/tests/support/process.cc
@@ -217,7 +217,6 @@ int WaitForIpc(int ipcPort, int timeout /*seconds*/, const char * request, size_
     socklen_t fromAddrLen = sizeof(fromAddr);
 
     fromAddr.sin_family = AF_INET;
-    fromAddr.sin_family = SOCK_DGRAM;
     fromAddr.sin_port = htons(ipcPort);
 
     if (inet_aton("127.0.0.1", &fromAddr.sin_addr) == 0)
diff --git a/ci/cppcheck.suppress b/ci/cppcheck.suppress
index 195e3a2..94d70d2 100644
--- a/ci/cppcheck.suppress
+++ b/ci/cppcheck.suppress
@@ -1,3 +1,6 @@
+// Suppress all warnings about unmatched suppressions!
+unmatchedSuppression:*
+
 // Suppress all warnings from gengetopt-generated files:
 *:*/*cmdline.c
 
@@ -8,3 +11,10 @@ unusedFunction:api/src/unsupported.c
 // Suppress all unused function warnings for now.
 unusedFunction:*
 
+// False positives
+
+// "Member variable 'CallbackHandler1::count' is not initialized in the constructor."
+uninitMemberVar:api/tests/client/test_subscribe_operation.cc
+uninitMemberVar:api/tests/server/test_observe_operation.cc
+uninitMemberVar:api/tests/server/test_server_events.cc
+
diff --git a/core/src/common/lwm2m_plaintext.c b/core/src/common/lwm2m_plaintext.c
index 37fae66..a82fa9b 100644
--- a/core/src/common/lwm2m_plaintext.c
+++ b/core/src/common/lwm2m_plaintext.c
@@ -198,7 +198,7 @@ static int PTDeserialiseResource(SerdesContext * serdesContext, Lwm2mTreeNode **
         case AwaResourceType_Boolean:
                 if (bufferLen == 1)
                 {
-                    bool temp;
+                    bool temp = false;
 
                     if (buffer[0] == '0')
                     {