diff --git a/client/client_test.go b/client/client_test.go
index da87517..fbad92b 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022-2023 The Decred developers
+// Copyright (c) 2022-2024 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -72,7 +72,7 @@ func TestErrorDetails(t *testing.T) {
 	for testName, testData := range tests {
 		t.Run(testName, func(t *testing.T) {
 
-			testServer := httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
+			testServer := httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, _ *http.Request) {
 				res.WriteHeader(testData.respHTTPStatus)
 				_, err := res.Write(testData.respBodyBytes)
 				if err != nil {
@@ -156,7 +156,7 @@ func TestSignatureValidation(t *testing.T) {
 	for testName, testData := range tests {
 		t.Run(testName, func(t *testing.T) {
 
-			testServer := httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
+			testServer := httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, _ *http.Request) {
 				res.Header().Add("VSP-Server-Signature", testData.responseSig)
 				res.WriteHeader(http.StatusOK)
 				_, err := res.Write(emptyJSON)
diff --git a/database/ticket_test.go b/database/ticket_test.go
index f8edd07..812b4b5 100644
--- a/database/ticket_test.go
+++ b/database/ticket_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2020-2023 The Decred developers
+// Copyright (c) 2020-2024 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -191,7 +191,7 @@ func testFilterTickets(t *testing.T) {
 	}
 
 	// Expect all tickets returned.
-	retrieved, err := db.filterTickets(func(t *bolt.Bucket) bool {
+	retrieved, err := db.filterTickets(func(_ *bolt.Bucket) bool {
 		return true
 	})
 	if err != nil {
diff --git a/database/upgrade_v3.go b/database/upgrade_v3.go
index 0e5012f..cdbadec 100644
--- a/database/upgrade_v3.go
+++ b/database/upgrade_v3.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2021-2022 The Decred developers
+// Copyright (c) 2021-2024 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -23,7 +23,7 @@ func ticketBucketUpgrade(db *bolt.DB, log slog.Logger) error {
 
 		// Count tickets so migration progress can be logged.
 		todo := 0
-		err := ticketBkt.ForEach(func(k, v []byte) error {
+		err := ticketBkt.ForEach(func(_, _ []byte) error {
 			todo++
 			return nil
 		})
diff --git a/database/votechange.go b/database/votechange.go
index 118c2a5..0ba3928 100644
--- a/database/votechange.go
+++ b/database/votechange.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2020-2021 The Decred developers
+// Copyright (c) 2020-2024 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -41,7 +41,7 @@ func (vdb *VspDatabase) SaveVoteChange(ticketHash string, record VoteChangeRecor
 		var count int
 		newest := uint32(0)
 		oldest := uint32(math.MaxUint32)
-		err = bkt.ForEach(func(k, v []byte) error {
+		err = bkt.ForEach(func(k, _ []byte) error {
 			count++
 			key := bytesToUint32(k)
 			if key > newest {