diff --git a/eth/catalyst/simulated_beacon.go b/eth/catalyst/simulated_beacon.go
index 2d6569e42218..8bdf94b80e81 100644
--- a/eth/catalyst/simulated_beacon.go
+++ b/eth/catalyst/simulated_beacon.go
@@ -302,7 +302,7 @@ func (c *SimulatedBeacon) AdjustTime(adjustment time.Duration) error {
 		return errors.New("parent not found")
 	}
 	withdrawals := c.withdrawals.gatherPending(10)
-	return c.sealBlock(withdrawals, parent.Time+uint64(adjustment))
+	return c.sealBlock(withdrawals, parent.Time+uint64(adjustment/time.Second))
 }
 
 func RegisterSimulatedBeaconAPIs(stack *node.Node, sim *SimulatedBeacon) {
diff --git a/ethclient/simulated/backend_test.go b/ethclient/simulated/backend_test.go
index a8fd7913c334..b70086b3854c 100644
--- a/ethclient/simulated/backend_test.go
+++ b/ethclient/simulated/backend_test.go
@@ -106,7 +106,7 @@ func TestAdjustTime(t *testing.T) {
 	block2, _ := client.BlockByNumber(context.Background(), nil)
 	prevTime := block1.Time()
 	newTime := block2.Time()
-	if newTime-prevTime != uint64(time.Minute) {
+	if newTime-prevTime != 60 {
 		t.Errorf("adjusted time not equal to 60 seconds. prev: %v, new: %v", prevTime, newTime)
 	}
 }