diff --git a/extensions/bluebubbles/src/participant-contact-names.test.ts b/extensions/bluebubbles/src/participant-contact-names.test.ts
index f415b30b4fb..0f0e132b114 100644
--- a/extensions/bluebubbles/src/participant-contact-names.test.ts
+++ b/extensions/bluebubbles/src/participant-contact-names.test.ts
@@ -1,3 +1,4 @@
+import { join } from "node:path";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import {
   enrichBlueBubblesParticipantsWithContactNames,
@@ -111,9 +112,17 @@ describe("enrichBlueBubblesParticipantsWithContactNames", () => {
   });
 
   it("lists contacts databases from the current home directory", async () => {
+    const expectedSourcesDir = join(
+      "/Users/tester",
+      "Library",
+      "Application Support",
+      "AddressBook",
+      "Sources",
+    );
+    const expectedDatabasePath = join(expectedSourcesDir, "source-a", "AddressBook-v22.abcddb");
     const readdir = vi.fn(async () => ["source-a", "source-b"]);
     const access = vi.fn(async (path: string) => {
-      if (!path.endsWith("source-a/AddressBook-v22.abcddb")) {
+      if (path !== expectedDatabasePath) {
         throw new Error("missing");
       }
     });
@@ -124,12 +133,8 @@ describe("enrichBlueBubblesParticipantsWithContactNames", () => {
       access,
     });
 
-    expect(readdir).toHaveBeenCalledWith(
-      "/Users/tester/Library/Application Support/AddressBook/Sources",
-    );
-    expect(databases).toEqual([
-      "/Users/tester/Library/Application Support/AddressBook/Sources/source-a/AddressBook-v22.abcddb",
-    ]);
+    expect(readdir).toHaveBeenCalledWith(expectedSourcesDir);
+    expect(databases).toEqual([expectedDatabasePath]);
   });
 
   it("queries only the requested phone keys in sqlite", async () => {