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-rw-r--r--tests/substvars.sh2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/substvars.sh b/tests/substvars.sh
index 12a061d..3701f0f 100644
--- a/tests/substvars.sh
+++ b/tests/substvars.sh
@@ -18,6 +18,8 @@
# along with the ProteanOS Development Kit. If not, see
# <http://www.gnu.org/licenses/>.
+set -eu
+
main()
{
plan_ 2