diff --git a/tests/03-shellcheck.sh b/tests/03-shellcheck.sh
new file mode 100755
index 0000000..45bffde
--- /dev/null
+++ b/tests/03-shellcheck.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -eu
+
+cd "$(dirname "$0")/.." || exit 1
+
+find . -type f -name "*.sh" -print0 | xargs -0 -t -n 1 shellcheck --