diff --git a/test/integration/mt_test.rb b/test/integration/mt_test.rb
index fa02c2f..f9fffc8 100644
--- a/test/integration/mt_test.rb
+++ b/test/integration/mt_test.rb
@@ -71,7 +71,7 @@ def test_mt_runs_watch_mode_that_executes_tests_when_files_change
         sleep 1
 
         # OK, we're done here. Tell mt --watch to exit.
-        Process.kill(:INT, pid)
+        Process.kill(:TERM, pid)
       end
 
       assert_includes(stdout, "Watching for changes to source and test files.")