diff --git a/src/test/crimson/test_backfill.cc b/src/test/crimson/test_backfill.cc
index 2200d2810de..eff8c2861b1 100644
--- a/src/test/crimson/test_backfill.cc
+++ b/src/test/crimson/test_backfill.cc
@@ -176,6 +176,7 @@ class BackfillFixture : public crimson::osd::BackfillState::BackfillListener {
     const hobject_t& new_last_backfill) override;
 
   bool budget_available() const override;
+  void request_budget_retry() override;
 
 public:
   MOCK_METHOD(void, backfilled, (), (override));
@@ -433,6 +434,13 @@ bool BackfillFixture::budget_available() const
   return true;
 }
 
+void BackfillFixture::request_budget_retry()
+{
+  // budget_available() always returns true in tests so BudgetBlocked
+  // should never be entered and this should never be called
+  ceph_abort_msg("request_budget_retry called unexpectedly in test");
+}
+
 struct BackfillFixtureBuilder {
   FakeStore backfill_source;
   std::map<pg_shard_t, FakeReplica> backfill_targets;