diff --git a/weed/shell/command_collection_list.go b/weed/shell/command_collection_list.go
index 4114f73d6d..580df53bea 100644
--- a/weed/shell/command_collection_list.go
+++ b/weed/shell/command_collection_list.go
@@ -67,6 +67,7 @@ func (c *commandCollectionList) Do(args []string, commandEnv *CommandEnv, writer
 	for _, c := range collections {
 		cif, found := collectionInfos[c]
 		if !found {
+			fmt.Fprintf(writer, "collection:\"%s\"\tvolumeCount:UNKNOWN\n", c)
 			continue
 		}
 		fmt.Fprintf(writer, "collection:\"%s\"\tvolumeCount:%d\tsize:%.0f\tfileCount:%.0f\tdeletedBytes:%.0f\tdeletion:%.0f\n", c, cif.VolumeCount, cif.Size, cif.FileCount, cif.DeletedByteCount, cif.DeleteCount)
diff --git a/weed/shell/command_collection_names_test.go b/weed/shell/command_collection_names_test.go
new file mode 100644
index 0000000000..d5a5e4c880
--- /dev/null
+++ b/weed/shell/command_collection_names_test.go
@@ -0,0 +1,54 @@
+package shell
+
+import (
+	"bytes"
+	"context"
+	"net"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
+	"google.golang.org/grpc"
+)
+
+type offlineCollectionMaster struct {
+	fakeDiscoveryServer
+	topologyCalls atomic.Int32
+}
+
+func (s *offlineCollectionMaster) CollectionList(context.Context, *master_pb.CollectionListRequest) (*master_pb.CollectionListResponse, error) {
+	return &master_pb.CollectionListResponse{Collections: []*master_pb.Collection{{Name: "unrelated-offline"}, {Name: "prospective"}}}, nil
+}
+func (s *offlineCollectionMaster) VolumeList(context.Context, *master_pb.VolumeListRequest) (*master_pb.VolumeListResponse, error) {
+	s.topologyCalls.Add(1)
+	return &master_pb.VolumeListResponse{TopologyInfo: &master_pb.TopologyInfo{}}, nil
+}
+func TestCollectionListIncludesOfflineNamespace(t *testing.T) {
+	lis, e := net.Listen("tcp", "127.0.0.1:0")
+	if e != nil {
+		t.Fatal(e)
+	}
+	server := grpc.NewServer()
+	srv := &offlineCollectionMaster{}
+	master_pb.RegisterSeaweedServer(server, srv)
+	go server.Serve(lis)
+	defer server.Stop()
+	_, port, _ := net.SplitHostPort(lis.Addr().String())
+	srv.leader = "127.0.0.1:0." + port
+	ce, cancel := discoveryEnv(srv.leader, 3*time.Second)
+	defer cancel()
+	var out bytes.Buffer
+	if e := (&commandCollectionList{}).Do(nil, ce, &out); e != nil {
+		t.Fatal(e)
+	}
+	for _, name := range []string{"unrelated-offline", "prospective"} {
+		if !strings.Contains(out.String(), "collection:\""+name+"\"\tvolumeCount:UNKNOWN\n") {
+			t.Fatalf("offline name omitted: %s", out.String())
+		}
+	}
+	if !strings.Contains(out.String(), "Total 2 collections.\n") || srv.topologyCalls.Load() != 1 {
+		t.Fatalf("incomplete listing: %s calls%d", out.String(), srv.topologyCalls.Load())
+	}
+}