diff --git a/collector/fixtures/ha_manager_status.json b/collector/fixtures/ha_manager_status.json
new file mode 100644
index 0000000..77d0516
--- /dev/null
+++ b/collector/fixtures/ha_manager_status.json
@@ -0,0 +1 @@
+{"data":{"manager_status":{"master_node":"node03","node_status":{"node01":"online","node02":"online","node03":"online"},"service_status":{"vm:106":{"node":"node01","running":1,"state":"started"}}},"lrm_status":{"node01":{"mode":"active","state":"active","timestamp":1774016350},"node02":{"mode":"active","state":"wait_for_agent_lock","timestamp":1774016351},"node03":{"mode":"active","state":"wait_for_agent_lock","timestamp":1774016351}}}}
diff --git a/collector/fixtures/ha_resources.json b/collector/fixtures/ha_resources.json
new file mode 100644
index 0000000..4c1921b
--- /dev/null
+++ b/collector/fixtures/ha_resources.json
@@ -0,0 +1 @@
+{"data":[{"sid":"vm:106","type":"vm","state":"started","max_restart":2,"max_relocate":2,"failback":1}]}
diff --git a/collector/ha_status_test.go b/collector/ha_status_test.go
new file mode 100644
index 0000000..e580143
--- /dev/null
+++ b/collector/ha_status_test.go
@@ -0,0 +1,60 @@
+package collector
+
+import (
+	"log/slog"
+	"strings"
+	"testing"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/testutil"
+)
+
+func TestHAStatusCollector(t *testing.T) {
+	client := newTestClient(t, map[string]string{
+		"/cluster/ha/status/manager_status": "ha_manager_status.json",
+		"/cluster/ha/resources":             "ha_resources.json",
+	})
+
+	collector := newHAStatusCollector(slog.Default())
+	adapter := &testCollectorAdapter{client: client, collector: collector}
+
+	reg := prometheus.NewRegistry()
+	reg.MustRegister(adapter)
+
+	expected := `
+# HELP pve_ha_crm_master Whether a node is the CRM master.
+# TYPE pve_ha_crm_master gauge
+pve_ha_crm_master{node="node01"} 0
+pve_ha_crm_master{node="node02"} 0
+pve_ha_crm_master{node="node03"} 1
+# HELP pve_ha_lrm_mode LRM mode for a node.
+# TYPE pve_ha_lrm_mode gauge
+pve_ha_lrm_mode{mode="active",node="node01"} 1
+pve_ha_lrm_mode{mode="active",node="node02"} 1
+pve_ha_lrm_mode{mode="active",node="node03"} 1
+# HELP pve_ha_lrm_timestamp_seconds Last LRM heartbeat as Unix timestamp.
+# TYPE pve_ha_lrm_timestamp_seconds gauge
+pve_ha_lrm_timestamp_seconds{node="node01"} 1.77401635e+09
+pve_ha_lrm_timestamp_seconds{node="node02"} 1.774016351e+09
+pve_ha_lrm_timestamp_seconds{node="node03"} 1.774016351e+09
+# HELP pve_ha_node_status HA node status.
+# TYPE pve_ha_node_status gauge
+pve_ha_node_status{node="node01",status="online"} 1
+pve_ha_node_status{node="node02",status="online"} 1
+pve_ha_node_status{node="node03",status="online"} 1
+# HELP pve_ha_service_config HA service configuration.
+# TYPE pve_ha_service_config gauge
+pve_ha_service_config{failback="1",max_relocate="2",max_restart="2",sid="vm:106",type="vm"} 1
+# HELP pve_ha_service_status HA service runtime status.
+# TYPE pve_ha_service_status gauge
+pve_ha_service_status{node="node01",sid="vm:106",state="started"} 1
+`
+
+	if err := testutil.GatherAndCompare(reg, strings.NewReader(expected),
+		"pve_ha_crm_master", "pve_ha_node_status",
+		"pve_ha_lrm_timestamp_seconds", "pve_ha_lrm_mode",
+		"pve_ha_service_config", "pve_ha_service_status",
+	); err != nil {
+		t.Errorf("unexpected metrics: %s", err)
+	}
+}