diff --git a/pkg/proxmox/cluster_client_additional_api6_test.go b/pkg/proxmox/cluster_client_additional_api6_test.go
new file mode 100644
index 000000000..142b62a4d
--- /dev/null
+++ b/pkg/proxmox/cluster_client_additional_api6_test.go
@@ -0,0 +1,59 @@
+package proxmox
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+func TestClusterClient_GetNodePendingUpdates_NoHealthyNodes(t *testing.T) {
+	cc := &ClusterClient{
+		name:       "test",
+		endpoints:  []string{"node1", "node2"},
+		nodeHealth: map[string]bool{"node1": false, "node2": false},
+		lastError:  make(map[string]string),
+		lastHealthCheck: map[string]time.Time{
+			"node1": time.Now(),
+			"node2": time.Now(),
+		},
+		rateLimitUntil: make(map[string]time.Time),
+	}
+
+	updates, err := cc.GetNodePendingUpdates(context.Background(), "node1")
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+	if len(updates) != 0 {
+		t.Fatalf("expected empty updates on no healthy nodes, got %+v", updates)
+	}
+}
+
+func TestClusterClient_GetVMAgentVersion_QemuGA(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		if r.URL.Path == "/api2/json/nodes" {
+			fmt.Fprint(w, `{"data":[{"node":"node1","status":"online"}]}`)
+			return
+		}
+		if r.URL.Path == "/api2/json/nodes/node1/qemu/100/agent/info" {
+			fmt.Fprint(w, `{"data":{"result":{"qemu-ga":{"version":"7.2.0"}}}}`)
+			return
+		}
+		w.WriteHeader(http.StatusNotFound)
+	}))
+	defer server.Close()
+
+	cfg := ClientConfig{Host: server.URL, TokenName: "u@p!t", TokenValue: "v"}
+	cc := NewClusterClient("test", cfg, []string{server.URL}, nil)
+
+	version, err := cc.GetVMAgentVersion(context.Background(), "node1", 100)
+	if err != nil {
+		t.Fatalf("GetVMAgentVersion failed: %v", err)
+	}
+	if version != "7.2.0" {
+		t.Fatalf("unexpected version: %s", version)
+	}
+}