diff --git a/ThirdParty/CMakeLists.txt b/ThirdParty/CMakeLists.txt
index 57e0d5402a6ac0cfdd89017924df6f5e381bc88e..db57f5dba843c4c6b94e759d294a1c1705de1c5f 100644
--- a/ThirdParty/CMakeLists.txt
+++ b/ThirdParty/CMakeLists.txt
@@ -32,7 +32,7 @@ if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/tetgen/CMakeLists.txt)
 endif()
 
 # vtkdiff
-if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/vtkdiff/CMakeLists.txt)
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/vtkdiff/CMakeLists.txt AND OGS_BUILD_TESTS)
     add_subdirectory(vtkdiff)
     install (PROGRAMS $<TARGET_FILE:vtkdiff> DESTINATION bin COMPONENT ogs_extras)
 endif()