6 files changed, 12 insertions, 0 deletions
diff --git a/tests/arch_is_concerned.sh b/tests/arch_is_concerned.sh
index 8398b42..095475a 100755
--- a/tests/arch_is_concerned.sh
+++ b/tests/arch_is_concerned.sh
@@ -18,6 +18,8 @@
 # along with the ProteanOS Development Kit.  If not, see
 # <http://www.gnu.org/licenses/>.
 
+set -eu
+
 main()
 {
 	plan_ 24
diff --git a/tests/parse_control.sh b/tests/parse_control.sh
index caf0a29..7167fca 100755
--- a/tests/parse_control.sh
+++ b/tests/parse_control.sh
@@ -18,6 +18,8 @@
 # along with the ProteanOS Development Kit.  If not, see
 # <http://www.gnu.org/licenses/>.
 
+set -eu
+
 LF='
 '
 CONTROL="$(cat <<-'EOF'
diff --git a/tests/plat_is_concerned.sh b/tests/plat_is_concerned.sh
index bec0fa3..1b1df26 100755
--- a/tests/plat_is_concerned.sh
+++ b/tests/plat_is_concerned.sh
@@ -18,6 +18,8 @@
 # along with the ProteanOS Development Kit.  If not, see
 # <http://www.gnu.org/licenses/>.
 
+set -eu
+
 main()
 {
 	plan_ 18
diff --git a/tests/reduce_deps.sh b/tests/reduce_deps.sh
index 41a4b58..53aa82d 100755
--- a/tests/reduce_deps.sh
+++ b/tests/reduce_deps.sh
@@ -18,6 +18,8 @@
 # along with the ProteanOS Development Kit.  If not, see
 # <http://www.gnu.org/licenses/>.
 
+set -eu
+
 main()
 {
 	plan_ 13
diff --git a/tests/resolve_deps.basic.sh b/tests/resolve_deps.basic.sh
index 9281bb4..d2200c4 100755
--- a/tests/resolve_deps.basic.sh
+++ b/tests/resolve_deps.basic.sh
@@ -18,6 +18,8 @@
 # along with the ProteanOS Development Kit.  If not, see
 # <http://www.gnu.org/licenses/>.
 
+set -eu
+
 pkgs='foo bar'
 deps="\
 foo: baz
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