diff --git a/apps/server/src/usage/UsageService.test.ts b/apps/server/src/usage/UsageService.test.ts
index 27c3a3ff3efe..7d3e09ff2da7 100644
--- a/apps/server/src/usage/UsageService.test.ts
+++ b/apps/server/src/usage/UsageService.test.ts
@@ -53,7 +53,10 @@ const WINDOW: UsageSummaryInput = {
 
 const setup = Effect.gen(function* () {
   const home = yield* Effect.promise(() =>
-    NodeFSP.mkdtemp(NodePath.join(NodeOS.tmpdir(), "usage-service-test-")),
+    NodeFSP.mkdtemp(NodePath.join(NodeOS.tmpdir(), "usage-service-test-")).then((path) =>
+      // Match the canonical paths used by source discovery, including macOS /var aliases.
+      NodeFSP.realpath(path),
+    ),
   );
   yield* Effect.addFinalizer(() =>
     Effect.promise(() => NodeFSP.rm(home, { recursive: true, force: true })),