diff --git a/Tests/FunctionalTests/TestDiscoveryTests.swift b/Tests/FunctionalTests/TestDiscoveryTests.swift
index 8a7064d1508..78931e8ac4c 100644
--- a/Tests/FunctionalTests/TestDiscoveryTests.swift
+++ b/Tests/FunctionalTests/TestDiscoveryTests.swift
@@ -319,4 +319,26 @@ struct TestDiscoveryTests {
             buildSystem == .swiftbuild && ProcessInfo.hostOperatingSystem == .windows
         }
     }
+	@Test(arguments: SupportedBuildSystemOnAllPlatforms)
+func testWithSanitizeAndFilterFailsWithPlatformPolicyViolation(
+    _ buildSystem: BuildSystemProvider.Kind
+) async throws {
+#if os(macOS)
+try await withKnownIssue(
+    "Fails due to swiftpm-xctest-helper (Xcode tool) violating platform sanitizer policy (#9546, rdar://168234231)"
+) {
+    try await fixture(name: "Miscellaneous/TestDiscovery/Simple") { fixturePath in
+        let (_, stderr) = try await executeSwiftTest(
+            fixturePath,
+            extraArgs: ["--sanitize", "address", "--filter", "testExample"],
+            buildSystem: buildSystem
+        )
+
+        #expect(stderr.contains("Sanitizer load violates platform policy"))
+    }
+}
+#else
+throw SkipTest("Sanitizer + filter behavior is macOS-specific")
+#endif
+
 }