Go 1.16 beta1: panic: unexpected call to os.Exit(0) during test

[eclipseo]

Golang 1.16 introduced a change that makes the test fail:

Testing    in: /builddir/build/BUILD/complete-2.0.1-alpha.13/_build/src
         PATH: /builddir/build/BUILD/complete-2.0.1-alpha.13/_build/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin
       GOPATH: /builddir/build/BUILD/complete-2.0.1-alpha.13/_build:/usr/share/gocode
  GO111MODULE: off
      command: go test -buildmode pie -compiler gc -ldflags " -X github.com/posener/complete/v2/version=2.0.1~alpha.13 -extldflags '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld  '"
      testing: github.com/posener/complete/v2
github.com/posener/complete/v2
PASS
ok  	github.com/posener/complete/v2	0.007s
github.com/posener/complete/v2/compflag
invalid value "3" for flag -a: not in allowed values: 1,2
Usage:
  -a value
    	
invalid value "3" for flag -a: not in allowed values: 1,2
Usage:
  -a value
    	 (default 0)
invalid value "1h" for flag -a: not in allowed values: 1s,1m
Usage:
invalid value "x" for flag -a: bad value for Int flag
  -a value
    	 (default 0s)
invalid value "1" for flag -a: bad value for Duration flag
Usage:
  -a value
    	 (default 0s)
Usage:
  -a value
    	 (default 0)
PASS
ok  	github.com/posener/complete/v2/compflag	0.006s
github.com/posener/complete/v2/gocomplete
run
--- FAIL: Example (0.00s)
panic: unexpected call to os.Exit(0) during test [recovered]
	panic: unexpected call to os.Exit(0) during test

It is maybe related to https://tip.golang.org/doc/go1.16#go-test

golang/go#29062
https://go-review.googlesource.com/c/go/+/250977/