diff --git a/Library/Homebrew/test/cask/artifact/app_spec.rb b/Library/Homebrew/test/cask/artifact/app_spec.rb
index eefdc2521e..f3ba605472 100644
--- a/Library/Homebrew/test/cask/artifact/app_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/app_spec.rb
@@ -341,13 +341,14 @@ describe Cask::Artifact::App, :cask do
       source_contents_path = source_path.join("Contents")
       target_contents_path = target_path.join("Contents")
 
-      expect(app.target).to receive(:writable?).at_least(:once).and_return false
+      allow(app.target).to receive(:writable?).and_return false
       allow(command).to receive(:run!).with(any_args).and_call_original
+
       expect(command).to receive(:run!)
         .with("/bin/cp", args: ["-pR", source_contents_path, target_path],
                          sudo: true)
         .and_call_original
-      expect(FileUtils).not_to receive(:move).with(source_contents_path, target_contents_path)
+      expect(FileUtils).not_to receive(:move).with(source_contents_path, an_instance_of(Pathname))
 
       app.uninstall_phase(command: command, force: force, successor: cask)
       expect(target_contents_path).not_to exist