diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b852127..feec8ab8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,7 +94,7 @@ option(WITH_DLT_FILE_LOGGING_SYSLOG_FALLBACK "Set to ON to enable fallback to sy
 option(WITH_DLT_NETWORK_TRACE "Set to ON to enable network trace (if message queue is supported)"                    ON)
 option(WITH_DLT_LOG_LEVEL_APP_CONFIG "Set to ON to enable default log levels based on application ids"               OFF)
 
-set(DLT_IPC "FIFO"
+set(DLT_IPC "UNIX_SOCKET"
     CACHE STRING "UNIX_SOCKET,FIFO")
 set(DLT_USER "covesa"
     CACHE STRING "Set user for process not run as root")
@@ -419,6 +419,11 @@ if(WITH_DLT_UNIT_TESTS)
 
     enable_testing()
     add_subdirectory(tests)
+
+    set(WITH_DLT_SHM_ENABLE ON)
+    if(WITH_DLT_SHM_ENABLE)
+        add_definitions(-DDLT_SHM_ENABLE)
+    endif()
 endif()
 
 message(STATUS)
@@ -491,4 +496,4 @@ message(STATUS "WITH_DLT_FILE_LOGGING_SYSLOG_FALLBACK = ${WITH_DLT_FILE_LOGGING_
 message(STATUS "WITH_DLT_LOG_LEVEL_APP_CONFIG = ${WITH_DLT_LOG_LEVEL_APP_CONFIG}")
 message(STATUS "Change a value with: cmake -D<Variable>=<Value>")
 message(STATUS "-------------------------------------------------------------------------------")
-message(STATUS)
+message(STATUS)
\ No newline at end of file