diff --git a/pkg/icingadb/v1/history/downtime_test.go b/pkg/icingadb/v1/history/downtime_test.go
new file mode 100644
index 000000000..2f4c3f9bc
--- /dev/null
+++ b/pkg/icingadb/v1/history/downtime_test.go
@@ -0,0 +1,103 @@
+package history
+
+import (
+	"database/sql/driver"
+	"github.com/icinga/icinga-go-library/types"
+	"github.com/stretchr/testify/require"
+	"testing"
+	"time"
+)
+
+func TestDowntimeEventTime_Value(t *testing.T) {
+	start := types.UnixMilli(time.Unix(23, 320000000))
+	cancel := types.UnixMilli(time.Unix(42, 240000000))
+	end := types.UnixMilli(time.Unix(1337, 733100000))
+
+	f := types.Bool{Bool: false, Valid: true}
+	T := types.Bool{Bool: true, Valid: true}
+
+	subtests := []struct {
+		name   string
+		input  *HistoryDowntime
+		output driver.Value
+	}{
+		{name: "nil-history"},
+		{name: "bad-event-type", input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "bad"},
+			StartTime:   start, CancelTime: cancel, EndTime: end, HasBeenCancelled: T,
+		}},
+		{name: "start", output: int64(23320), input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_start"},
+			StartTime:   start, CancelTime: cancel, EndTime: end, HasBeenCancelled: T,
+		}},
+		{name: "has-been-cancelled-nil", input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_end"},
+			StartTime:   start, CancelTime: cancel, EndTime: end,
+		}},
+		{name: "has-been-cancelled", output: int64(42240), input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_end"},
+			StartTime:   start, CancelTime: cancel, EndTime: end, HasBeenCancelled: T,
+		}},
+		{name: "end", output: int64(1337733), input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_end"},
+			StartTime:   start, CancelTime: cancel, EndTime: end, HasBeenCancelled: f,
+		}},
+		{name: "start-nil", input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_start"},
+			CancelTime:  cancel, EndTime: end, HasBeenCancelled: T,
+		}},
+		{name: "cancel-time-nil", input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_end"},
+			StartTime:   start, EndTime: end, HasBeenCancelled: T,
+		}},
+		{name: "end-nil", input: &HistoryDowntime{
+			HistoryMeta: HistoryMeta{EventType: "downtime_end"},
+			StartTime:   start, CancelTime: cancel, HasBeenCancelled: f,
+		}},
+	}
+
+	for _, st := range subtests {
+		t.Run(st.name, func(t *testing.T) {
+			v, err := (DowntimeEventTime{History: st.input}).Value()
+
+			require.NoError(t, err)
+			require.Equal(t, st.output, v)
+		})
+	}
+}
+
+func TestSlaDowntimeEndTime_Value(t *testing.T) {
+	cancel := types.UnixMilli(time.Unix(42, 240000000))
+	end := types.UnixMilli(time.Unix(1337, 733100000))
+
+	f := types.Bool{Bool: false, Valid: true}
+	T := types.Bool{Bool: true, Valid: true}
+
+	subtests := []struct {
+		name       string
+		cancelled  types.Bool
+		cancelTime types.UnixMilli
+		endTime    types.UnixMilli
+		output     driver.Value
+	}{
+		{name: "nil", cancelTime: cancel, endTime: end, output: int64(1337733)},
+		{name: "invalid", cancelled: types.Bool{Bool: true}, cancelTime: cancel, endTime: end, output: int64(1337733)},
+		{name: "false", cancelled: f, cancelTime: cancel, endTime: end, output: int64(1337733)},
+		{name: "true", cancelled: T, cancelTime: cancel, endTime: end, output: int64(42240)},
+		{name: "false-nil", cancelled: f, cancelTime: cancel},
+		{name: "true-nil", cancelled: T, endTime: end},
+	}
+
+	for _, st := range subtests {
+		t.Run(st.name, func(t *testing.T) {
+			v, err := (SlaDowntimeEndTime{History: &SlaHistoryDowntime{
+				HasBeenCancelled: st.cancelled,
+				CancelTime:       st.cancelTime,
+				EndTime:          st.endTime,
+			}}).Value()
+
+			require.NoError(t, err)
+			require.Equal(t, st.output, v)
+		})
+	}
+}