diff --git a/tests/test_litellm/proxy/guardrails/guardrail_hooks/content_filter/test_eu_patterns.py b/tests/test_litellm/proxy/guardrails/guardrail_hooks/content_filter/test_eu_patterns.py
new file mode 100644
index 00000000000..dfab059717c
--- /dev/null
+++ b/tests/test_litellm/proxy/guardrails/guardrail_hooks/content_filter/test_eu_patterns.py
@@ -0,0 +1,76 @@
+from litellm.proxy.guardrails.guardrail_hooks.litellm_content_filter.patterns import (
+    get_compiled_pattern,
+)
+
+
+class TestFrenchNIR:
+    """Test French NIR/INSEE detection"""
+
+    def test_valid_nir_detected(self):
+        pattern = get_compiled_pattern("fr_nir")
+        # Valid NIR: sex=1, year=92, month=05, dept=75, commune=123, order=456, key=78
+        assert pattern.search("192057512345678") is not None
+        assert pattern.search("292057512345678") is not None  # Female
+
+    def test_invalid_month_rejected(self):
+        pattern = get_compiled_pattern("fr_nir")
+        assert pattern.search("192137512345678") is None  # Month 13
+        assert pattern.search("192007512345678") is None  # Month 00
+
+    def test_invalid_sex_digit_rejected(self):
+        pattern = get_compiled_pattern("fr_nir")
+        assert pattern.search("392057512345678") is None  # Sex digit 3
+
+
+class TestEUIBANEnhanced:
+    """Test enhanced EU IBAN detection"""
+
+    def test_french_iban(self):
+        pattern = get_compiled_pattern("eu_iban_enhanced")
+        assert pattern.search("FR7630006000011234567890189") is not None
+
+    def test_german_iban(self):
+        pattern = get_compiled_pattern("eu_iban_enhanced")
+        assert pattern.search("DE89370400440532013000") is not None
+
+
+class TestFrenchPhone:
+    """Test French phone number detection"""
+
+    def test_formats(self):
+        pattern = get_compiled_pattern("fr_phone")
+        assert pattern.search("+33612345678") is not None
+        assert pattern.search("0033612345678") is not None
+        assert pattern.search("0612345678") is not None
+
+    def test_invalid_first_digit(self):
+        pattern = get_compiled_pattern("fr_phone")
+        assert pattern.search("0012345678") is None  # First digit can't be 0
+
+
+class TestEUVAT:
+    """Test EU VAT number detection"""
+
+    def test_major_eu_countries(self):
+        pattern = get_compiled_pattern("eu_vat")
+        assert pattern.search("FR12345678901") is not None
+        assert pattern.search("DE123456789") is not None
+        assert pattern.search("IT12345678901") is not None
+
+
+class TestEUPassportGeneric:
+    """Test generic EU passport detection"""
+
+    def test_format(self):
+        pattern = get_compiled_pattern("eu_passport_generic")
+        assert pattern.search("12AB34567") is not None
+
+
+class TestFrenchPostalCode:
+    """Test French postal code contextual detection"""
+
+    def test_with_context(self):
+        # This test validates the pattern exists
+        # Contextual matching is tested in integration tests
+        pattern = get_compiled_pattern("fr_postal_code")
+        assert pattern.search("75001") is not None