Fixes GitHub coverage issue #539

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	9m 12s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	9m 38s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	4m 16s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	4m 59s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	6m 38s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	6m 26s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	4m 57s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	3m 32s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	10m 31s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	9m 21s
	1h 9m 30s

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