test sign: fix syntax error #1768

Job	Run time
coverage-test	5m 51s
coverity-test	0s
master-tss-build-test (gcc)	5m 12s
build-test (ubuntu-20.04, gcc)	1m 2s
master-tss-build-test (clang)	4m 56s
build-test (ubuntu-20.04, clang)	4m 57s
build-test (fedora-30, gcc)	5m 13s
build-test (fedora-30, clang)	5m 12s
build-test (opensuse-leap, gcc)	5m 13s
build-test (opensuse-leap, clang)	5m 13s
build-test (fedora-32, gcc)	5m 13s
build-test (fedora-32, clang)	5m 10s
build-test (ubuntu-22.04, gcc)	52s
build-test (ubuntu-22.04, clang)	57s
	55m 1s

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