diff --git a/go/vt/vtorc/logic/cell_discovery_test.go b/go/vt/vtorc/logic/cell_discovery_test.go
new file mode 100644
index 00000000000..c52716ceff0
--- /dev/null
+++ b/go/vt/vtorc/logic/cell_discovery_test.go
@@ -0,0 +1,53 @@
+/*
+Copyright 2025 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package logic
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"vitess.io/vitess/go/vt/topo/memorytopo"
+	"vitess.io/vitess/go/vt/vtorc/db"
+	"vitess.io/vitess/go/vt/vtorc/inst"
+)
+
+func TestRefreshAllCells(t *testing.T) {
+	// Store the old flags and restore on test completion
+	oldTs := ts
+	oldClustersToWatch := clustersToWatch
+	defer func() {
+		ts = oldTs
+		clustersToWatch = oldClustersToWatch
+	}()
+
+	db.ClearVTOrcDatabase()
+	defer func() {
+		db.ClearVTOrcDatabase()
+	}()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	ts = memorytopo.NewServer(ctx, "zone1", "zone2", "zone3")
+
+	require.NoError(t, RefreshCells(ctx))
+
+	cells, err := inst.ReadCells()
+	require.NoError(t, err)
+	require.Equal(t, []string{"zone1", "zone2", "zone3"}, cells)
+}