diff --git a/src/__tests__/async-behavior.test.ts b/src/__tests__/async-behavior.test.ts
index e4286fb..96971bd 100644
--- a/src/__tests__/async-behavior.test.ts
+++ b/src/__tests__/async-behavior.test.ts
@@ -1,7 +1,7 @@
 // src/__tests__/async-behavior.test.ts
 
 import { times } from "../array.js";
-import { TimeoutError } from "../async.js";
+import { delay, TimeoutError } from "../async.js";
 import { defer } from "../defer.js";
 import {
   ExcludedMountPointGlobsDefault,
@@ -88,8 +88,9 @@ describe("Filesystem API Async Behavior", () => {
       // sometimes thenOrTimeout() fails to reject in time
       jest.retryTimes(5);
     });
-    afterEach(() => {
+    afterEach(async () => {
       jest.retryTimes(0);
+      await delay(500);
     });
     it("getVolumeMountPoints() should reject with timeoutMs=1", async () => {
       await expect(getVolumeMountPoints({ timeoutMs: 1 })).rejects.toThrow(
diff --git a/src/__tests__/unix.test.ts b/src/__tests__/unix.test.ts
index 81c921f..8a0c5be 100644
--- a/src/__tests__/unix.test.ts
+++ b/src/__tests__/unix.test.ts
@@ -1,5 +1,6 @@
 // src/__tests__/unix.test.ts
 
+import { sortByStr } from "../array.js";
 import {
   ExcludedMountPointGlobsDefault,
   getVolumeMetadata,
@@ -74,7 +75,7 @@ describePlatform("linux", "darwin")(
 
       it("should return sorted mount points", async () => {
         const mountPoints = await getVolumeMountPoints();
-        const sorted = [...mountPoints].sort();
+        const sorted = sortByStr([...mountPoints], (ea) => ea);
         expect(mountPoints).toEqual(sorted);
       });
     });
@@ -199,6 +200,11 @@ describePlatform("linux", "darwin")(
             ...ExcludedMountPointGlobsDefault,
             "/init",
             "/boot",
+            // Avoid: "/System/Volumes/Data", "/System/Volumes/Data/home",
+            // "/System/Volumes/Hardware", "/System/Volumes/Preboot",
+            // "/System/Volumes/Update", "/System/Volumes/VM",
+            // "/System/Volumes/iSCPreboot", "/System/Volumes/xarts",
+            "/System/**",
           ],
         });
         const arr = await Promise.all(
diff --git a/src/async.ts b/src/async.ts
index 6ddcd20..956b09c 100644
--- a/src/async.ts
+++ b/src/async.ts
@@ -73,3 +73,12 @@ export function thenOrTimeout<T>(
     timeoutPromise,
   ]);
 }
+
+/**
+ * Delay for the specified number of milliseconds.
+ *
+ * @param ms The number of milliseconds to delay
+ */
+export async function delay(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}