diff --git a/common/networkquality/http3.go b/common/networkquality/http3.go
index 5e28d9fd6..0e907821d 100644
--- a/common/networkquality/http3.go
+++ b/common/networkquality/http3.go
@@ -37,7 +37,7 @@ func NewHTTP3MeasurementClientFactory(dialer N.Dialer) (MeasurementClientFactory
 				if dialErr != nil {
 					return nil, dialErr
 				}
-				var wrappedConn net.Conn = udpConn
+				wrappedConn := udpConn
 				if len(readCounters) > 0 || len(writeCounters) > 0 {
 					wrappedConn = sBufio.NewCounterConn(udpConn, readCounters, writeCounters)
 				}
diff --git a/experimental/libbox/internal/oomprofile/oomprofile.go b/experimental/libbox/internal/oomprofile/oomprofile.go
index f26d3b589..cd0b9bec0 100644
--- a/experimental/libbox/internal/oomprofile/oomprofile.go
+++ b/experimental/libbox/internal/oomprofile/oomprofile.go
@@ -95,7 +95,8 @@ func writeAlloc(w io.Writer) error {
 
 func writeHeapInternal(w io.Writer, defaultSampleType string) error {
 	var profile []memProfileRecord
-	n, ok := runtimeMemProfileInternal(nil, true)
+	n, _ := runtimeMemProfileInternal(nil, true)
+	var ok bool
 	for {
 		profile = make([]memProfileRecord, n+50)
 		n, ok = runtimeMemProfileInternal(profile, true)
@@ -121,7 +122,8 @@ func writeRuntimeProfile(w io.Writer, name string, fetch func([]stackRecord, []u
 	var profile []stackRecord
 	var labels []unsafe.Pointer
 
-	n, ok := fetch(nil, nil)
+	n, _ := fetch(nil, nil)
+	var ok bool
 	for {
 		profile = make([]stackRecord, n+10)
 		labels = make([]unsafe.Pointer, n+10)
@@ -146,7 +148,8 @@ func writeMutex(w io.Writer) error {
 
 func writeCycleProfile(w io.Writer, countName string, cycleName string, fetch func([]blockProfileRecord) (int, bool)) error {
 	var profile []blockProfileRecord
-	n, ok := fetch(nil)
+	n, _ := fetch(nil)
+	var ok bool
 	for {
 		profile = make([]blockProfileRecord, n+50)
 		n, ok = fetch(profile)
diff --git a/experimental/libbox/internal/oomprofile/protobuf.go b/experimental/libbox/internal/oomprofile/protobuf.go
index 0f06e00d5..ed60df21c 100644
--- a/experimental/libbox/internal/oomprofile/protobuf.go
+++ b/experimental/libbox/internal/oomprofile/protobuf.go
@@ -22,7 +22,7 @@ func (b *protobuf) length(tag int, length int) {
 }
 
 func (b *protobuf) uint64(tag int, x uint64) {
-	b.varint(uint64(tag)<<3 | 0)
+	b.varint(uint64(tag) << 3)
 	b.varint(x)
 }