diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 2913dccfb..a7958cbd0 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -104,8 +104,12 @@ endif()
 # Test the generated build configs
 #############################################################################
 
-add_subdirectory(cmake_import)
-add_subdirectory(cmake_import_minver)
+# these tests depend on the generated file nlohmann_jsonConfig.cmake
+if (JSON_Install)
+    add_subdirectory(cmake_import)
+    add_subdirectory(cmake_import_minver)
+endif()
+
 add_subdirectory(cmake_add_subdirectory)
 add_subdirectory(cmake_fetch_content)
 add_subdirectory(cmake_target_include_directories)