diff --git a/shell/clean_and_deploy.sh b/shell/clean_and_deploy.sh
index 36eaa9c..d225795 100644
--- a/shell/clean_and_deploy.sh
+++ b/shell/clean_and_deploy.sh
@@ -1,3 +1,4 @@
 #!/bin/bash
+set -e
 
 hexo clean && hexo g && hexo d
\ No newline at end of file
diff --git a/tests/mock_bin/hexo b/tests/mock_bin/hexo
new file mode 100755
index 0000000..932ce48
--- /dev/null
+++ b/tests/mock_bin/hexo
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# A simple mock hexo that fails if the environment variable HEXO_SHOULD_FAIL is set
+if [[ -n "$HEXO_SHOULD_FAIL" ]]; then
+  echo "Mock hexo: simulated failure" >&2
+  exit 1
+fi
+
+echo "Mock hexo: success"
+exit 0
diff --git a/tests/test_error.sh b/tests/test_error.sh
new file mode 100755
index 0000000..80aac39
--- /dev/null
+++ b/tests/test_error.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Setup environment
+export PATH="$(pwd)/tests/mock_bin:$PATH"
+
+echo "Testing clean_and_deploy.sh failure handling..."
+
+# Case: Hexo fails
+export HEXO_SHOULD_FAIL=1
+if bash shell/clean_and_deploy.sh; then
+  echo "TEST FAILED: clean_and_deploy.sh should have exited with a non-zero code."
+  exit 1
+else
+  echo "TEST PASSED: clean_and_deploy.sh correctly exited with a non-zero code when hexo failed."
+fi
+
+# Case: Hexo succeeds
+unset HEXO_SHOULD_FAIL
+if bash shell/clean_and_deploy.sh; then
+  echo "TEST PASSED: clean_and_deploy.sh correctly exited with a zero code when hexo succeeded."
+else
+  echo "TEST FAILED: clean_and_deploy.sh should have exited with a zero code."
+  exit 1
+fi
+
+echo "All tests passed!"
+exit 0