https://savannah.gnu.org/bugs/?63726
https://git.savannah.gnu.org/cgit/groff.git/commit/?id=10274fb69e517b2c4b10fcd0ba3347e5bd0eefd7
--- a/Makefile.in
+++ b/Makefile.in
@@ -4195,8 +4195,7 @@ SUFFIXES = .roff .in .ps .mom .pdf .me .ms .ps .html .txt .texi .dvi \
 
 # tests launched by make check
 check_SCRIPTS = 
-TESTS = contrib/gdiffmk/tests/gdiffmk_tests.sh $(am__append_5) \
-	$(am__append_8)
+TESTS = $(am__append_5) $(am__append_8)
 AM_TESTS_ENVIRONMENT = \
   abs_top_srcdir=$(abs_top_srcdir) \
   abs_top_builddir=$(abs_top_builddir) \
@@ -9570,13 +9569,6 @@ recheck: all $(check_PROGRAMS) $(check_SCRIPTS)
 	        am__force_recheck=am--force-recheck \
 	        TEST_LOGS="$$log_list"; \
 	exit $$?
-contrib/gdiffmk/tests/gdiffmk_tests.sh.log: contrib/gdiffmk/tests/gdiffmk_tests.sh
-	@p='contrib/gdiffmk/tests/gdiffmk_tests.sh'; \
-	b='contrib/gdiffmk/tests/gdiffmk_tests.sh'; \
-	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
-	--log-file $$b.log --trs-file $$b.trs \
-	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
-	"$$tst" $(AM_TESTS_FD_REDIRECT)
 contrib/hdtbl/examples/test-hdtbl.sh.log: contrib/hdtbl/examples/test-hdtbl.sh
 	@p='contrib/hdtbl/examples/test-hdtbl.sh'; \
 	b='contrib/hdtbl/examples/test-hdtbl.sh'; \
--- a/contrib/gdiffmk/gdiffmk.am
+++ b/contrib/gdiffmk/gdiffmk.am
@@ -26,7 +26,6 @@
 ########################################################################
 gdiffmk_srcdir = $(top_srcdir)/contrib/gdiffmk
 bin_SCRIPTS += gdiffmk
-TESTS += contrib/gdiffmk/tests/gdiffmk_tests.sh
 man1_MANS += contrib/gdiffmk/gdiffmk.1
 EXTRA_DIST += \
   contrib/gdiffmk/gdiffmk.1.man \