diff --git a/test/framework/toy_build.py b/test/framework/toy_build.py
index 61a9cca2e5..dd2f5d6364 100644
--- a/test/framework/toy_build.py
+++ b/test/framework/toy_build.py
@@ -1909,7 +1909,9 @@ def test_toy_exts_parallel(self):
             "    ('barbar', '0.0', {",
             "        'start_dir': 'src',",
             "    }),",
-            "    ('toy', '0.0'),",
+            "    ('toy', '0.0', {",
+            """        'prebuildopts': "pwd & ls -lrt && ",""",
+            "    }),",
             "]",
             "sanity_check_commands = ['barbar', 'toy']",
             "sanity_check_paths = {'files': ['bin/barbar', 'bin/toy'], 'dirs': ['bin']}",