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-rw-r--r--src/mongo/dbtests/plan_ranking.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mongo/dbtests/plan_ranking.cpp b/src/mongo/dbtests/plan_ranking.cpp
index 0c85cfbdfac..991ffc6d316 100644
--- a/src/mongo/dbtests/plan_ranking.cpp
+++ b/src/mongo/dbtests/plan_ranking.cpp
@@ -121,6 +121,8 @@ namespace PlanRankingTests {
BSONObj unused;
ASSERT(_mpr->pickBestPlan(&bestPlan, &unused));
ASSERT_LESS_THAN(bestPlan, solutions.size());
+ // This is what sets a backup plan, should we test for it.
+ _mpr->cacheBestPlan();
return solutions[bestPlan];
}