diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 2c605a7..9e73a80 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -32,18 +32,10 @@ jobs:
 
     - name: Test
       run: go test -v -coverprofile=coverage.txt -covermode=atomic ./...
-
-    - name: Codecov upload coverage
-      shell: bash
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
-        RUN_ID: ${{ github.run_id }}
-      run: |
-        # Replace `linux` below with the appropriate OS
-        # Options are `alpine`, `linux`, `macos`, `windows`
-        # You will need to setup the environment variables below in github
-        # and the project in codecov.io: https://app.codecov.io/gh/${{ github.repository }}
-        go test -v -coverprofile=coverage.txt -covermode=atomic ./...
-        curl -Os https://uploader.codecov.io/latest/linux/codecov
-        chmod +x codecov
-        ./codecov --verbose upload-process --fail-on-error -t $CODECOV_TOKEN -n 'service'-$RUN_ID -F service -f coverage.txt
+    
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        slug: soypat/lneto
+    
\ No newline at end of file
diff --git a/tcp/txqueue.go b/tcp/txqueue.go
index 3d24111..44fdccb 100644
--- a/tcp/txqueue.go
+++ b/tcp/txqueue.go
@@ -2,7 +2,6 @@ package tcp
 
 import (
 	"errors"
-	"time"
 
 	"github.com/soypat/lneto/internal"
 )
@@ -18,9 +17,6 @@ type ringTx struct {
 	rawbuf []byte
 	// packets contains
 	packets []ringidx
-	// _firstPkt is the index of the oldest packet in the packets field.
-	// _firstPkt int
-	// _lastPkt  int
 	// unsentOff is the offset of start of unsent data into rawbuf.
 	unsentoff int
 	// unsentend is the offset of end of unsent data in rawbuf.
@@ -38,9 +34,7 @@ type ringidx struct {
 	end int
 	// seq is the sequence number of the packet.
 	seq Value
-	t   time.Time
-	// acked flags if this packet has been acknowledged. Useful for SACK (selective acknowledgement)
-	// acked bool
+	// time is a measure of the instant of time message was sent at.
 }
 
 // Reset resets the RingTx's internal state to use buf as the main ring buffer and creates or reuses
@@ -130,14 +124,6 @@ func (tx *ringTx) MakePacket(b []byte) (int, Value, error) {
 	return n, seq, nil
 }
 
-func (tx *ringTx) packetRing(i int) internal.Ring {
-	pkt := tx.packets[i]
-	if pkt.off < 0 {
-		return internal.Ring{}
-	}
-	return tx.ring(pkt.off, pkt.end)
-}
-
 // RecvSegment processes an incoming segment and updates the sent packet queue
 func (tx *ringTx) RecvACK(ack Value) error {
 	for i := range tx.packets {
diff --git a/tcp/txqueue_test.go b/tcp/txqueue_test.go
index f6c2546..4ccae0f 100644
--- a/tcp/txqueue_test.go
+++ b/tcp/txqueue_test.go
@@ -34,7 +34,7 @@ func TestTxQueue_SequentialMessages(t *testing.T) {
 			t.Fatalf("want %d unsent buffered, got %d", unsent, len(msg))
 		}
 		sent := rtx.BufferedSent()
-		if sent > 0 {
+		if sent != 0 {
 			t.Fatalf("want 0 bytes sent, got %d", sent)
 		}
 		n, seq, err := rtx.MakePacket(data[:])
@@ -47,6 +47,10 @@ func TestTxQueue_SequentialMessages(t *testing.T) {
 		} else if seq != prevSeq {
 			t.Fatalf("want seq %d, got %d", prevSeq, seq)
 		}
+		sent = rtx.BufferedSent()
+		if sent != len(msg) {
+			t.Fatalf("want %d sent, got %d", len(msg), sent)
+		}
 		prevSeq += Value(n)
 		err = rtx.RecvACK(prevSeq)
 		if err != nil {