diff --git a/unix-ffi/unittest/manifest.py b/unix-ffi/unittest/manifest.py
index 3f4ddae59..f011a5fd1 100644
--- a/unix-ffi/unittest/manifest.py
+++ b/unix-ffi/unittest/manifest.py
@@ -1,6 +1,8 @@
 metadata(version="0.9.0")
 
-require("argparse", unix_ffi=True)
-require("fnmatch")
-
 module("unittest.py")
+
+if options.discover:
+    module("unittest_discover.py")
+    require("argparse", unix_ffi=True)
+    require("fnmatch")