diff --git a/test/cpp-utils/CMakeLists.txt b/test/cpp-utils/CMakeLists.txt
index dc132db6..cc799a9c 100644
--- a/test/cpp-utils/CMakeLists.txt
+++ b/test/cpp-utils/CMakeLists.txt
@@ -53,5 +53,10 @@ add_executable(${PROJECT_NAME} ${SOURCES})
 target_link_libraries(${PROJECT_NAME} googletest cpp-utils)
 add_test(${PROJECT_NAME} ${PROJECT_NAME})
 
+# This is needed by boost thread
+if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+    target_link_libraries(${PROJECT_NAME} PUBLIC rt)
+endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+
 target_enable_style_warnings(${PROJECT_NAME})
 target_activate_cpp14(${PROJECT_NAME})
diff --git a/test/fspp/CMakeLists.txt b/test/fspp/CMakeLists.txt
index 3df535d7..7eaed7d9 100644
--- a/test/fspp/CMakeLists.txt
+++ b/test/fspp/CMakeLists.txt
@@ -106,5 +106,10 @@ add_executable(${PROJECT_NAME} ${SOURCES})
 target_link_libraries(${PROJECT_NAME} googletest fspp)
 add_test(${PROJECT_NAME} ${PROJECT_NAME})
 
+# This is needed by boost thread
+if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+    target_link_libraries(${PROJECT_NAME} PUBLIC rt)
+endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+
 target_enable_style_warnings(${PROJECT_NAME})
 target_activate_cpp14(${PROJECT_NAME})