diff --git a/R/OptimizerBatch.R b/R/OptimizerBatch.R
index 30c7d87d..22b74253 100644
--- a/R/OptimizerBatch.R
+++ b/R/OptimizerBatch.R
@@ -67,6 +67,7 @@ optimize_batch_default = function(instance, optimizer) {
   lg$info("Result:")
   lg$info(capture.output(print(
     instance$result, lass = FALSE, row.names = FALSE, print.keys = FALSE)))
+  call_back("on_optimization_end", instance$objective$callbacks, instance$objective$context)
   return(instance$result)
 }
 
diff --git a/tests/testthat/test_Callback.R b/tests/testthat/test_Callback.R
index 7b64c906..a163b839 100644
--- a/tests/testthat/test_Callback.R
+++ b/tests/testthat/test_Callback.R
@@ -35,7 +35,7 @@ test_that("on_optimization_end works", {
   optimizer = opt("random_search")
   optimizer$optimize(instance)
   expect_class(instance$objective$context, "ContextBatch")
-  expect_equal(instance$terminator$param_set$values$n_evals, 10)
+  expect_equal(instance$terminator$param_set$values$n_evals, 20)
 })
 
 test_that("on_result in OptimInstanceBatchSingleCrit works", {