diff --git a/tests/test.bash b/tests/test.bash
new file mode 100755
index 0000000..b55322f
--- /dev/null
+++ b/tests/test.bash
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $TRACE ]] && set -x
+
+plaintext=$(mktemp /tmp/cryptr.XXXXXXXX)
+dd if=/dev/urandom bs=1024 count=1 2> /dev/null | LC_ALL=C tr -dc 'A-Za-z0-9' | head -c200 > "$plaintext"
+plaintext_sha=$(shasum -a 256 "$plaintext")
+
+cryptr encrypt "$plaintext"
+rm -f "$plaintext"
+cryptr decrypt "$plaintext".aes
+
+decrypted_sha=$(shasum -a 256 "$plaintext")
+
+echo "$plaintext_sha"
+echo "$decrypted_sha"