diff --git a/tests/test_validators/test_patterns.py b/tests/test_validators/test_patterns.py
new file mode 100644
index 0000000..7e462fc
--- /dev/null
+++ b/tests/test_validators/test_patterns.py
@@ -0,0 +1,15 @@
+import pytest
+from src.validators import PatternValidator
+
+class TestPatternValidator:
+    def setup_method(self):
+        self.validator = PatternValidator()
+
+    def test_detect_dangerous_rm(self):
+        findings = self.validator.check("rm -rf $TARGET_DIR")
+        assert len(findings) == 1
+        assert findings[0].rule_id == "DANGER001"
+
+    def test_safe_command(self):
+        findings = self.validator.check("ls -la /tmp")
+        assert len(findings) == 0