Only in fontconfig-2.13.1-new: Makefile
diff -u -r fontconfig-2.13.1/Makefile.am fontconfig-2.13.1-new/Makefile.am
--- fontconfig-2.13.1/Makefile.am	2018-06-05 13:36:38.000000000 +0300
+++ fontconfig-2.13.1-new/Makefile.am	2021-05-05 22:32:49.230804234 +0300
@@ -24,7 +24,7 @@
 SUBDIRS=fontconfig fc-case fc-lang src \
 	fc-cache fc-cat fc-conflist fc-list fc-match \
 	fc-pattern fc-query fc-scan fc-validate conf.d \
-	its po po-conf test
+	its po po-conf
 if ENABLE_DOCS
 SUBDIRS += doc
 endif