--- a/Makefile.in
+++ b/Makefile.in
@@ -2399,7 +2399,7 @@ top_srcdir = @top_srcdir@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 AUTOMAKE_OPTIONS = gnu 1.12
-SUBDIRS = po lib doc src tests gnulib-tests
+SUBDIRS = po lib src
 EXTRA_DIST = \
   .mailmap		\
   ChangeLog-2009	\
