diff --git a/test/runtest.sh b/test/runtest.sh
index bb20d02f..8715741d 100755
--- a/test/runtest.sh
+++ b/test/runtest.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-set -eu
+set -eux
 
 texec() {
     ./testenv_exec.sh "$finit_pid" "$@"
diff --git a/test/testenv_start.sh b/test/testenv_start.sh
index afdbb34b..38673e0d 100755
--- a/test/testenv_start.sh
+++ b/test/testenv_start.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-set -eu
+set -eux
 
 TEST_DIR=$(dirname "$0")
 TESTS_ROOT="$(pwd)/${TEST_DIR}/test_root"