Update test fixtures to use explicit run

Change-Id: I3060a2bf57cef10a5a7ec5299e3491f1f6751221
diff --git a/tests/fixtures/layouts/nonvoting-pipeline.yaml b/tests/fixtures/layouts/nonvoting-pipeline.yaml
index d8468dd..afe0528 100644
--- a/tests/fixtures/layouts/nonvoting-pipeline.yaml
+++ b/tests/fixtures/layouts/nonvoting-pipeline.yaml
@@ -12,13 +12,16 @@
 - job:
     name: base
     parent: null
+    run: playbooks/base.yaml
 
 - job:
     name: project-merge
     hold-following-changes: true
+    run: playbooks/project-merge.yaml
 
 - job:
     name: experimental-project-test
+    run: playbooks/experimental-project-test.yaml
 
 - project:
     name: org/experimental-project