diff --git a/internal/controller/testworkflows/testworkflow_controller.go b/internal/controller/testworkflows/testworkflow_controller.go
index 43211c5..2e39332 100644
--- a/internal/controller/testworkflows/testworkflow_controller.go
+++ b/internal/controller/testworkflows/testworkflow_controller.go
@@ -30,6 +30,7 @@ import (
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/intstr"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/log"
@@ -242,6 +243,11 @@ func MergeCronJobJobConfig(dst, include *testworkflowsv1.CronJobConfig) *testwor
 	}
 	maps.Copy(dst.Annotations, include.Annotations)
 
+	if len(include.Config) > 0 && dst.Config == nil {
+		dst.Config = map[string]intstr.IntOrString{}
+	}
+	maps.Copy(dst.Config, include.Config)
+
 	return dst
 }