diff --git a/tools/run_tests/run_lcov.sh b/tools/run_tests/run_lcov.sh
index ec97ebf0a5b8ca5c24352b6e79a16ad0edb491a3..796a0b5ceb2fe1834a1a84fc847dc0825120ad77 100755
--- a/tools/run_tests/run_lcov.sh
+++ b/tools/run_tests/run_lcov.sh
@@ -33,7 +33,7 @@ set -ex
 out=$(readlink -f ${1:-coverage})
 
 root=$(readlink -f $(dirname $0)/../..)
-shift
+shift || true
 tmp=$(mktemp)
 cd $root
 tools/run_tests/run_tests.py -c gcov -l c c++ $@ || true