T = $(sort $(wildcard t[0-9][0-9][0-9][0-9]-*.sh))
 TSVN = $(sort $(wildcard t91[0-9][0-9]-*.sh))
 TGITWEB = $(sort $(wildcard t95[0-9][0-9]-*.sh))
+THELPERS = $(sort $(filter-out $(T),$(wildcard *.sh)))
 
 all: $(DEFAULT_TEST_TARGET)
 
                echo >&2 "non-executable tests:" $$bad; exit 1; }
 
 test-lint-shell-syntax:
-       @'$(PERL_PATH_SQ)' check-non-portable-shell.pl $(T)
+       @'$(PERL_PATH_SQ)' check-non-portable-shell.pl $(T) $(THELPERS)
 
 aggregate-results-and-cleanup: $(T)
        $(MAKE) aggregate-results