diff --git a/metrics/cpu_syscall.go b/metrics/cpu_syscall.go
index c111d89e7fcfd..0a3897ea3de5b 100644
--- a/metrics/cpu_syscall.go
+++ b/metrics/cpu_syscall.go
@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
+//go:build !windows
 // +build !windows
 
 package metrics
@@ -31,5 +32,5 @@ func getProcessCPUTime() int64 {
 		log.Warn("Failed to retrieve CPU time", "err", err)
 		return 0
 	}
-	return int64(usage.Utime.Sec+usage.Stime.Sec)*100 + int64(usage.Utime.Usec+usage.Stime.Usec)/10000 //nolint:unconvert
+	return (usage.Utime.Sec+usage.Stime.Sec)*100 + int64(usage.Utime.Usec+usage.Stime.Usec)/10000 //nolint:unconvert
 }
diff --git a/metrics/gauge_float64_test.go b/metrics/gauge_float64_test.go
index 3ee568e7ba09c..ae088d4abf3b3 100644
--- a/metrics/gauge_float64_test.go
+++ b/metrics/gauge_float64_test.go
@@ -12,27 +12,27 @@ func BenchmarkGuageFloat64(b *testing.B) {
 
 func TestGaugeFloat64(t *testing.T) {
 	g := NewGaugeFloat64()
-	g.Update(float64(47.0))
-	if v := g.Value(); float64(47.0) != v {
+	g.Update(47.0)
+	if v := g.Value(); v != 47.0 {
 		t.Errorf("g.Value(): 47.0 != %v\n", v)
 	}
 }
 
 func TestGaugeFloat64Snapshot(t *testing.T) {
 	g := NewGaugeFloat64()
-	g.Update(float64(47.0))
+	g.Update(47.0)
 	snapshot := g.Snapshot()
 	g.Update(float64(0))
-	if v := snapshot.Value(); float64(47.0) != v {
+	if v := snapshot.Value(); v != 47.0 {
 		t.Errorf("g.Value(): 47.0 != %v\n", v)
 	}
 }
 
 func TestGetOrRegisterGaugeFloat64(t *testing.T) {
 	r := NewRegistry()
-	NewRegisteredGaugeFloat64("foo", r).Update(float64(47.0))
+	NewRegisteredGaugeFloat64("foo", r).Update(47.0)
 	t.Logf("registry: %v", r)
-	if g := GetOrRegisterGaugeFloat64("foo", r); float64(47.0) != g.Value() {
+	if g := GetOrRegisterGaugeFloat64("foo", r); g.Value() != 47.0 {
 		t.Fatal(g)
 	}
 }