Fixes GitHub coverage issue #537

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	4m 0s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	4m 0s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	3m 59s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	4m 0s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	4m 0s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	3m 50s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	3m 24s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	4m 0s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	3m 59s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	4m 0s
	39m 12s

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