diff --git a/src/media/read-capability.test.ts b/src/media/read-capability.test.ts
index 0e2277ec2ca..5cc47655dc7 100644
--- a/src/media/read-capability.test.ts
+++ b/src/media/read-capability.test.ts
@@ -17,7 +17,11 @@ describe("resolveAgentScopedOutboundMediaAccess", () => {
       mediaAccess: { workspaceDir: "/tmp/media-workspace" },
     });
 
-    expect(result).toMatchObject({ workspaceDir: "/tmp/media-workspace" });
+    expect(Object.keys(result)).toStrictEqual(["localRoots", "readFile", "workspaceDir"]);
+    expect(Array.isArray(result.localRoots)).toBe(true);
+    expect(result.localRoots?.length).toBeGreaterThan(0);
+    expect(typeof result.readFile).toBe("function");
+    expect(result.workspaceDir).toBe("/tmp/media-workspace");
   });
 
   it("prefers explicit workspaceDir over mediaAccess.workspaceDir", () => {
@@ -27,7 +31,11 @@ describe("resolveAgentScopedOutboundMediaAccess", () => {
       mediaAccess: { workspaceDir: "/tmp/media-workspace" },
     });
 
-    expect(result).toMatchObject({ workspaceDir: "/tmp/explicit-workspace" });
+    expect(Object.keys(result)).toStrictEqual(["localRoots", "readFile", "workspaceDir"]);
+    expect(Array.isArray(result.localRoots)).toBe(true);
+    expect(result.localRoots?.length).toBeGreaterThan(0);
+    expect(typeof result.readFile).toBe("function");
+    expect(result.workspaceDir).toBe("/tmp/explicit-workspace");
   });
 
   it("does not enable host reads when sender group policy denies read", () => {