Makefile.am:
TESTS += test-mbsstr1 test-mbsstr2.sh test-mbsstr3.sh
-TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@' LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+TESTS_ENVIRONMENT += LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_ZH_CN='@LOCALE_ZH_CN@'
check_PROGRAMS += test-mbsstr1 test-mbsstr2 test-mbsstr3