diff --git a/docs/pipelines.md b/docs/pipelines.md
index 63e02e8b46a..ea3fc3b59ad 100644
--- a/docs/pipelines.md
+++ b/docs/pipelines.md
@@ -279,6 +279,8 @@ tasks:
       name: build-push
 ```
 
+**Note:** Using both `apiVersion` and `kind` will create [CustomRun](customruns.md), don't set `apiVersion` if only referring to [`Task`](tasks.md).
+
 or
 
 ```yaml
@@ -1537,7 +1539,7 @@ that is responsible for watching and updating `CustomRun`s which reference their
 ### Specifying the target Custom Task
 
 To specify the custom task type you want to execute, the `taskRef` field
-must include the custom task's `apiVersion` and `kind` as shown below:
+must include the custom task's `apiVersion` and `kind` as shown below, `apiVersion` is only used to create `CustomRun`:
 
 ```yaml
 spec:
diff --git a/pkg/reconciler/taskrun/resources/taskref_test.go b/pkg/reconciler/taskrun/resources/taskref_test.go
index a739c20a8f1..444103a5475 100644
--- a/pkg/reconciler/taskrun/resources/taskref_test.go
+++ b/pkg/reconciler/taskrun/resources/taskref_test.go
@@ -396,10 +396,9 @@ func TestGetTaskFunc(t *testing.T) {
 				},
 			},
 			ref: &v1beta1.TaskRef{
-				Name:       "simple",
-				APIVersion: "tekton.dev/v1beta1",
-				Kind:       v1beta1.ClusterTaskKind,
-				Bundle:     u.Host + "/remote-cluster-task",
+				Name:   "simple",
+				Kind:   v1beta1.ClusterTaskKind,
+				Bundle: u.Host + "/remote-cluster-task",
 			},
 			expected: &v1beta1.Task{
 				ObjectMeta: metav1.ObjectMeta{Name: "simple"},