diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a8b9586..0f68e40 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -177,6 +177,7 @@
     add_custom_target(tls13-compat.sh
         DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/opt-testcases/tls13-compat.sh)
     set_target_properties(tls13-compat.sh PROPERTIES EXCLUDE_FROM_ALL NO)
+    add_dependencies(${ssl_opt_target} tls13-compat.sh)
 
 else()
     foreach(file ${all_generated_data_files})