diff --git a/meson.build b/meson.build
index 9bd3146..cbc46df 100644
--- a/meson.build
+++ b/meson.build
@@ -22,3 +22,7 @@
 if get_option('modbus-rtu').allowed()
     subdir('rtu')
 endif
+
+if get_option('tests').allowed()
+    subdir('tests')
+endif