fix env vars in commandline tests #26

Job	Run time
Test CUDA support	37s
Test build-std (aarch64-tvos)	5m 56s
MSRV (ubuntu-latest)	26s
Clippy	11s
Test build-std (aarch64-tvos-sim)	2m 34s
MSRV (windows-latest)	38s
Test build-std (x86_64-tvos)	4m 18s
Rustfmt	16s
Test (stable)	28s
Test (beta)	26s
Test (nightly)	28s
Test (linux32)	1m 14s
Test (macos)	56s
Test (aarch64-macos)	43s
Test (aarch64-ios)	1m 5s
Test (win32)	2m 0s
Test (win64)	1m 58s
Test (mingw32)	2m 0s
Test (mingw64)	1m 55s
Test (windows-2019)	2m 1s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	1m 57s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	1m 44s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	1m 23s
	35m 14s

Provide feedback