diff --git a/replica/database.hh b/replica/database.hh
index edb72b4f2d..c2d429ebc1 100644
--- a/replica/database.hh
+++ b/replica/database.hh
@@ -571,12 +571,6 @@ private:
         // overwrite an existing table.
         return sstables::generation_from_value((*_sstable_generation)++ * smp::count + this_shard_id());
     }
-
-    // inverse of calculate_generation_for_new_table(), used to determine which
-    // shard a sstable should be opened at.
-    static seastar::shard_id calculate_shard_from_sstable_generation(sstables::generation_type sstable_generation) {
-        return sstables::generation_value(sstable_generation) % smp::count;
-    }
 private:
     void rebuild_statistics();
 
diff --git a/test/boost/sstable_resharding_test.cc b/test/boost/sstable_resharding_test.cc
index 714a414b31..43e5e83aaf 100644
--- a/test/boost/sstable_resharding_test.cc
+++ b/test/boost/sstable_resharding_test.cc
@@ -102,6 +102,7 @@ void run_sstable_resharding_test() {
     BOOST_REQUIRE(new_sstables.size() == smp::count);
 
     uint64_t bloom_filter_size_after = 0;
+    std::unordered_set<shard_id> processed_shards;
 
     for (auto& sstable : new_sstables) {
         auto new_sst = env.reusable_sst(s, tmp.path().string(), generation_value(sstable->generation()),
@@ -111,7 +112,7 @@ void run_sstable_resharding_test() {
         auto shards = new_sst->get_shards_for_this_sstable();
         BOOST_REQUIRE(shards.size() == 1); // check sstable is unshared.
         auto shard = shards.front();
-        BOOST_REQUIRE(column_family_test::calculate_shard_from_sstable_generation(generation_value(new_sst->generation())) == shard);
+        BOOST_REQUIRE(processed_shards.insert(shard).second == true); // check resharding created one sstable per shard.
 
         auto rd = assert_that(new_sst->as_mutation_source().make_reader_v2(s, env.make_reader_permit()));
         BOOST_REQUIRE(muts[shard].size() == keys_per_shard);
diff --git a/test/boost/sstable_test.hh b/test/boost/sstable_test.hh
index c47c4df805..abc0ca8428 100644
--- a/test/boost/sstable_test.hh
+++ b/test/boost/sstable_test.hh
@@ -50,10 +50,6 @@ public:
         return generation_value(cf.calculate_generation_for_new_table());
     }
 
-    static int64_t calculate_shard_from_sstable_generation(int64_t generation) {
-        return replica::column_family::calculate_shard_from_sstable_generation(generation_from_value(generation));
-    }
-
     auto try_flush_memtable_to_sstable(lw_shared_ptr<replica::memtable> mt) {
         auto cg = _cf->single_compaction_group_if_available();
         assert(cg);