Index: tests/CMakeLists.txt
--- tests/CMakeLists.txt.orig
+++ tests/CMakeLists.txt
@@ -19,7 +19,6 @@ if(APPLE)
 endif()
 
 get_property(open62541_BUILD_INCLUDE_DIRS TARGET open62541 PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
-include_directories(${open62541_BUILD_INCLUDE_DIRS})
 # ua_server_internal.h
 include_directories("${PROJECT_SOURCE_DIR}/src")
 include_directories("${PROJECT_SOURCE_DIR}/src/server")
@@ -45,10 +44,11 @@ if(UA_ENABLE_ENCRYPTION_LIBRESSL)
 endif()
 
 if(CMAKE_HOST_SYSTEM_NAME MATCHES "OpenBSD")
-    include_directories(AFTER /usr/local/include)
     link_directories(AFTER /usr/local/lib)
     add_definitions(-Wno-gnu-zero-variadic-macro-arguments)
 endif()
+
+include_directories(BEFORE ${open62541_BUILD_INCLUDE_DIRS})
 
 add_definitions(-DUA_sleep_ms=UA_comboSleep)
 
