diff --git a/Library/Homebrew/test/cask/system_command_spec.rb b/Library/Homebrew/test/cask/system_command_spec.rb
index b589e979ec..eb6f8e0515 100644
--- a/Library/Homebrew/test/cask/system_command_spec.rb
+++ b/Library/Homebrew/test/cask/system_command_spec.rb
@@ -183,7 +183,7 @@ describe Hbc::SystemCommand, :cask do
     }
 
     it "returns without deadlocking" do
-      wait(15).for {
+      wait(30).for {
         described_class.run(command, options)
       }.to be_a_success
     end