diff --git a/pkg/cmd/pr/shared/finder_test.go b/pkg/cmd/pr/shared/finder_test.go
index 36551ab42..25a948416 100644
--- a/pkg/cmd/pr/shared/finder_test.go
+++ b/pkg/cmd/pr/shared/finder_test.go
@@ -89,6 +89,19 @@ func TestFind(t *testing.T) {
 			wantPR:   13,
 			wantRepo: "https://github.com/ORIGINOWNER/REPO",
 		},
+		{
+			name: "PR number 0 is invalid",
+			args: args{
+				selector:   "0",
+				fields:     []string{"id", "number"},
+				baseRepoFn: stubBaseRepoFn(ghrepo.New("ORIGINOWNER", "REPO"), nil),
+				branchFn: func() (string, error) {
+					return "blueberries", nil
+				},
+				branchConfig: stubBranchConfig(git.BranchConfig{}, nil),
+			},
+			wantErr: true,
+		},
 		{
 			name: "number argument with base branch",
 			args: args{