.PHONY: check-TESTS
-if %?PARALLEL_TESTS%
+if !%?SERIAL_TESTS%
include inst-vars.am
.PHONY: recheck
-else !%?PARALLEL_TESTS%
+else %?SERIAL_TESTS%
+
+## Obsolescent serial testsuite driver.
check-TESTS: $(TESTS)
@failed=0; all=0; xfail=0; xpass=0; skip=0; \
test "$$failed" -eq 0; \
else :; fi
-endif !%?PARALLEL_TESTS%
+endif %?SERIAL_TESTS%