diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 6d6f35eb65..b2e5d2611a 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -13,6 +13,7 @@ add_subdirectory(LibMarkdown)
 add_subdirectory(LibPthread)
 add_subdirectory(LibRegex)
 add_subdirectory(LibSQL)
+add_subdirectory(LibThreading)
 add_subdirectory(LibUnicode)
 add_subdirectory(LibWasm)
 add_subdirectory(LibWeb)