154     putenv("PYTHONMALLOC=");  in test_pre_initialization_api()
253     putenv("PYTHONMALLOC=");  in test_bpo20891()
424     putenv("PYTHONUTF8=0");  in test_init_global_config()
434     putenv("PYTHONINSPECT=");  in test_init_global_config()
437     putenv("PYTHONOPTIMIZE=0");  in test_init_global_config()
440     putenv("PYTHONDEBUG=0");  in test_init_global_config()
445     putenv("PYTHONDONTWRITEBYTECODE=");  in test_init_global_config()
448     putenv("PYTHONVERBOSE=0");  in test_init_global_config()
454     putenv("PYTHONUNBUFFERED=");  in test_init_global_config()
474     putenv("PYTHONMALLOC=malloc_debug");  in test_init_from_config()
477     putenv("PYTHONUTF8=0");  in test_init_from_config()
493     putenv("PYTHONHASHSEED=42");  in test_init_from_config()
499     putenv("PYTHONFAULTHANDLER=");  in test_init_from_config()
502     putenv("PYTHONTRACEMALLOC=0");  in test_init_from_config()
505     putenv("PYTHONPROFILEIMPORTTIME=0");  in test_init_from_config()
512     putenv("PYTHONMALLOCSTATS=0");  in test_init_from_config()
515     putenv("PYTHONPYCACHEPREFIX=env_pycache_prefix");  in test_init_from_config()
552     putenv("PYTHONVERBOSE=0");  in test_init_from_config()
562     putenv("PYTHONINSPECT=");  in test_init_from_config()
569     putenv("PYTHONOPTIMIZE=0");  in test_init_from_config()
575     putenv("PYTHONDONTWRITEBYTECODE=");  in test_init_from_config()
584     putenv("PYTHONUNBUFFERED=");  in test_init_from_config()
588     putenv("PYTHONIOENCODING=cp424");  in test_init_from_config()
598     putenv("PYTHONNOUSERSITE=");  in test_init_from_config()
654     putenv("PYTHONHASHSEED=42");  in set_most_env_vars()
655     putenv("PYTHONMALLOC=malloc");  in set_most_env_vars()
656     putenv("PYTHONTRACEMALLOC=2");  in set_most_env_vars()
657     putenv("PYTHONPROFILEIMPORTTIME=1");  in set_most_env_vars()
658     putenv("PYTHONMALLOCSTATS=1");  in set_most_env_vars()
659     putenv("PYTHONUTF8=1");  in set_most_env_vars()
660     putenv("PYTHONVERBOSE=1");  in set_most_env_vars()
661     putenv("PYTHONINSPECT=1");  in set_most_env_vars()
662     putenv("PYTHONOPTIMIZE=2");  in set_most_env_vars()
663     putenv("PYTHONDONTWRITEBYTECODE=1");  in set_most_env_vars()
664     putenv("PYTHONUNBUFFERED=1");  in set_most_env_vars()
665     putenv("PYTHONPYCACHEPREFIX=env_pycache_prefix");  in set_most_env_vars()
666     putenv("PYTHONNOUSERSITE=1");  in set_most_env_vars()
667     putenv("PYTHONFAULTHANDLER=1");  in set_most_env_vars()
668     putenv("PYTHONIOENCODING=iso8859-1:replace");  in set_most_env_vars()
676     putenv("PYTHONWARNINGS=EnvVar");  in set_all_env_vars()
677     putenv("PYTHONPATH=/my/path");  in set_all_env_vars()
711     putenv("PYTHONMALLOC=");  in set_all_env_vars_dev_mode()
712     putenv("PYTHONFAULTHANDLER=");  in set_all_env_vars_dev_mode()
713     putenv("PYTHONDEVMODE=1");  in set_all_env_vars_dev_mode()
734     putenv("PYTHONMALLOC=malloc");  in test_init_env_dev_mode_alloc()
1029     putenv("PYTHONFAULTHANDLER=");  in test_init_dev_mode()
1030     putenv("PYTHONMALLOC=");  in test_init_dev_mode()
1390     putenv("TESTPATH=");  in test_init_setpath()
1423     putenv("TESTPATH=");  in test_init_setpath_config()
1452     putenv("TESTHOME=");  in test_init_setpythonhome()
1463     putenv("PYTHONWARNINGS=ignore:::env1,ignore:::env2");  in test_init_warnoptions()