diff --git a/core/era_backend.go b/core/era_backend.go
new file mode 100644
index 0000000000..9a8bc9592b
--- /dev/null
+++ b/core/era_backend.go
@@ -0,0 +1 @@
+package core
diff --git a/eth/catalyst/simulated_beacon.go b/eth/catalyst/simulated_beacon.go
index c96bfb4e15..f1235f4ab5 100644
--- a/eth/catalyst/simulated_beacon.go
+++ b/eth/catalyst/simulated_beacon.go
@@ -127,7 +127,7 @@ func NewSimulatedBeacon(period uint64, feeRecipient common.Address, eth *eth.Eth
 	}
 
 	// cap the dev mode period to a reasonable maximum value to avoid overflowing the time.Duration (int64) that it will occupy
-	maxPeriod := uint64(math.Floor(math.MaxInt64 / time.Second))
+	maxPeriod := uint64(math.MaxInt64 / time.Second)
 	if period > maxPeriod {
 		log.Warn(fmt.Sprintf("period exceeds maximum possible value (have: %d, max: %d).  Sanitizing period to maximum possible value.", period, maxPeriod))
 		period = maxPeriod