diff --git a/internal/asynqtest/asynqtest.go b/internal/asynqtest/asynqtest.go
index 50e73ef..9dab962 100644
--- a/internal/asynqtest/asynqtest.go
+++ b/internal/asynqtest/asynqtest.go
@@ -10,6 +10,7 @@ import (
 	"math"
 	"sort"
 	"testing"
+	"time"
 
 	"github.com/go-redis/redis/v7"
 	"github.com/google/go-cmp/cmp"
@@ -126,12 +127,14 @@ func JSON(kv map[string]interface{}) []byte {
 func TaskMessageAfterRetry(t base.TaskMessage, errMsg string) *base.TaskMessage {
 	t.Retried = t.Retried + 1
 	t.ErrorMsg = errMsg
+	t.LastFailedAt = time.Now().Unix() // use EquateApproxTime with cmp.Diff
 	return &t
 }
 
 // TaskMessageWithError returns an updated copy of t with the given error message.
 func TaskMessageWithError(t base.TaskMessage, errMsg string) *base.TaskMessage {
 	t.ErrorMsg = errMsg
+	t.LastFailedAt = time.Now().Unix() // use EquateApproxTime with cmp.Diff
 	return &t
 }
 
diff --git a/internal/rdb/rdb.go b/internal/rdb/rdb.go
index 21fdfc3..dc94194 100644
--- a/internal/rdb/rdb.go
+++ b/internal/rdb/rdb.go
@@ -483,14 +483,15 @@ return redis.status_reply("OK")`)
 // and assigning error message to the task message.
 func (r *RDB) Retry(msg *base.TaskMessage, processAt time.Time, errMsg string) error {
 	var op errors.Op = "rdb.Retry"
+	now := time.Now()
 	modified := *msg
 	modified.Retried++
 	modified.ErrorMsg = errMsg
+	modified.LastFailedAt = now.Unix()
 	encoded, err := base.EncodeMessage(&modified)
 	if err != nil {
 		return errors.E(op, errors.Internal, fmt.Sprintf("cannot encode message: %v", err))
 	}
-	now := time.Now()
 	expireAt := now.Add(statsTTL)
 	keys := []string{
 		base.TaskKey(msg.Queue, msg.ID.String()),
@@ -551,13 +552,14 @@ return redis.status_reply("OK")`)
 // It also trims the archive by timestamp and set size.
 func (r *RDB) Archive(msg *base.TaskMessage, errMsg string) error {
 	var op errors.Op = "rdb.Archive"
+	now := time.Now()
 	modified := *msg
 	modified.ErrorMsg = errMsg
+	modified.LastFailedAt = now.Unix()
 	encoded, err := base.EncodeMessage(&modified)
 	if err != nil {
 		return errors.E(op, errors.Internal, fmt.Sprintf("cannot encode message: %v", err))
 	}
-	now := time.Now()
 	cutoff := now.AddDate(0, 0, -archivedExpirationInDays)
 	expireAt := now.Add(statsTTL)
 	keys := []string{
diff --git a/internal/rdb/rdb_test.go b/internal/rdb/rdb_test.go
index 95d9e39..7936bf5 100644
--- a/internal/rdb/rdb_test.go
+++ b/internal/rdb/rdb_test.go
@@ -1163,9 +1163,13 @@ func TestRetry(t *testing.T) {
 				t.Errorf("mismatch found in %q; (-want, +got)\n%s", base.DeadlinesKey(queue), diff)
 			}
 		}
+		cmpOpts := []cmp.Option{
+			h.SortZSetEntryOpt,
+			cmpopts.EquateApproxTime(5 * time.Second), // for LastFailedAt field
+		}
 		for queue, want := range tc.wantRetry {
 			gotRetry := h.GetRetryEntries(t, r.client, queue)
-			if diff := cmp.Diff(want, gotRetry, h.SortZSetEntryOpt); diff != "" {
+			if diff := cmp.Diff(want, gotRetry, cmpOpts...); diff != "" {
 				t.Errorf("mismatch found in %q; (-want, +got)\n%s", base.RetryKey(queue), diff)
 			}
 		}
@@ -1368,7 +1372,7 @@ func TestArchive(t *testing.T) {
 		}
 		for queue, want := range tc.wantArchived {
 			gotArchived := h.GetArchivedEntries(t, r.client, queue)
-			if diff := cmp.Diff(want, gotArchived, h.SortZSetEntryOpt, zScoreCmpOpt); diff != "" {
+			if diff := cmp.Diff(want, gotArchived, h.SortZSetEntryOpt, zScoreCmpOpt, timeCmpOpt); diff != "" {
 				t.Errorf("mismatch found in %q after calling (*RDB).Archive: (-want, +got):\n%s", base.ArchivedKey(queue), diff)
 			}
 		}