diff --git a/models/issues/review_test.go b/models/issues/review_test.go
index 1868cb1bfab25..ac1b84adebcc2 100644
--- a/models/issues/review_test.go
+++ b/models/issues/review_test.go
@@ -288,3 +288,33 @@ func TestDeleteDismissedReview(t *testing.T) {
 	assert.NoError(t, issues_model.DeleteReview(db.DefaultContext, review))
 	unittest.AssertNotExistsBean(t, &issues_model.Comment{ID: comment.ID})
 }
+
+func TestAddReviewRequest(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	pull := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 1})
+	assert.NoError(t, pull.LoadIssue(db.DefaultContext))
+	issue := pull.Issue
+	assert.NoError(t, issue.LoadRepo(db.DefaultContext))
+	reviewer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
+	_, err := issues_model.CreateReview(db.DefaultContext, issues_model.CreateReviewOptions{
+		Issue:    issue,
+		Reviewer: reviewer,
+		Type:     issues_model.ReviewTypeReject,
+	})
+
+	assert.NoError(t, err)
+	pull.HasMerged = false
+	assert.NoError(t, pull.UpdateCols(db.DefaultContext, "has_merged"))
+	issue.IsClosed = true
+	_, err = issues_model.AddReviewRequest(db.DefaultContext, issue, reviewer, &user_model.User{})
+	assert.Error(t, err)
+	assert.True(t, issues_model.IsErrReviewRequestOnClosedPR(err))
+
+	pull.HasMerged = true
+	assert.NoError(t, pull.UpdateCols(db.DefaultContext, "has_merged"))
+	issue.IsClosed = false
+	_, err = issues_model.AddReviewRequest(db.DefaultContext, issue, reviewer, &user_model.User{})
+	assert.Error(t, err)
+	assert.True(t, issues_model.IsErrReviewRequestOnClosedPR(err))
+}
diff --git a/services/pull/review_test.go b/services/pull/review_test.go
new file mode 100644
index 0000000000000..21669bb25d1c5
--- /dev/null
+++ b/services/pull/review_test.go
@@ -0,0 +1,45 @@
+package pull_test
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+	pull_service "code.gitea.io/gitea/services/pull"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDismissReview(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	pull := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{})
+	assert.NoError(t, pull.LoadIssue(db.DefaultContext))
+	issue := pull.Issue
+	assert.NoError(t, issue.LoadRepo(db.DefaultContext))
+	reviewer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
+	review, err := issues_model.CreateReview(db.DefaultContext, issues_model.CreateReviewOptions{
+		Issue:    issue,
+		Reviewer: reviewer,
+		Type:     issues_model.ReviewTypeReject,
+	})
+
+	assert.NoError(t, err)
+	issue.IsClosed = true
+	pull.HasMerged = false
+	assert.NoError(t, issues_model.UpdateIssueCols(db.DefaultContext, issue, "is_closed"))
+	assert.NoError(t, pull.UpdateCols(db.DefaultContext, "has_merged"))
+	_, err = pull_service.DismissReview(db.DefaultContext, review.ID, issue.RepoID, "", &user_model.User{}, false, false)
+	assert.Error(t, err)
+	assert.True(t, pull_service.IsErrDismissRequestOnClosedPR(err))
+
+	pull.HasMerged = true
+	pull.Issue.IsClosed = false
+	assert.NoError(t, issues_model.UpdateIssueCols(db.DefaultContext, issue, "is_closed"))
+	assert.NoError(t, pull.UpdateCols(db.DefaultContext, "has_merged"))
+	_, err = pull_service.DismissReview(db.DefaultContext, review.ID, issue.RepoID, "", &user_model.User{}, false, false)
+	assert.Error(t, err)
+	assert.True(t, pull_service.IsErrDismissRequestOnClosedPR(err))
+}