diff --git a/tests/Makefile.am.inc b/tests/Makefile.am.inc
index 1db5b37d..19d76b96 100644
--- a/tests/Makefile.am.inc
+++ b/tests/Makefile.am.inc
@@ -28,7 +28,8 @@ test_doc_portal_LDADD = \
              libglnx.la \
              libflatpak-common.la \
              $(NULL)
-test_doc_portal_SOURCES = tests/test-doc-portal.c $(xdp_dbus_built_sources)
+test_doc_portal_SOURCES = tests/test-doc-portal.c
+nodist_test_doc_portal_SOURCES = $(xdp_dbus_built_sources)
 
 testlibrary_CFLAGS = $(BASE_CFLAGS)
 testlibrary_LDADD = \