diff --git a/lib/connections/tcp_listen.go b/lib/connections/tcp_listen.go
index c932fc13b..da0830d0f 100644
--- a/lib/connections/tcp_listen.go
+++ b/lib/connections/tcp_listen.go
@@ -214,7 +214,7 @@ func (t *tcpListener) Factory() listenerFactory {
 	return t.factory
 }
 
-func (t *tcpListener) NATType() string {
+func (*tcpListener) NATType() string {
 	return "unknown"
 }
 
diff --git a/lib/discover/global_test.go b/lib/discover/global_test.go
index 174156b44..3090edcbf 100644
--- a/lib/discover/global_test.go
+++ b/lib/discover/global_test.go
@@ -241,9 +241,9 @@ func (s *fakeDiscoveryServer) handler(w http.ResponseWriter, r *http.Request) {
 
 type fakeAddressLister struct{}
 
-func (f *fakeAddressLister) ExternalAddresses() []string {
+func (*fakeAddressLister) ExternalAddresses() []string {
 	return []string{"tcp://0.0.0.0:22000"}
 }
-func (f *fakeAddressLister) AllAddresses() []string {
+func (*fakeAddressLister) AllAddresses() []string {
 	return []string{"tcp://0.0.0.0:22000", "tcp://192.168.0.1:22000"}
 }
diff --git a/lib/discover/manager.go b/lib/discover/manager.go
index 9f3caf135..efbdc05d2 100644
--- a/lib/discover/manager.go
+++ b/lib/discover/manager.go
@@ -167,11 +167,11 @@ func (m *manager) Lookup(ctx context.Context, deviceID protocol.DeviceID) (addre
 	return addresses, nil
 }
 
-func (m *manager) String() string {
+func (*manager) String() string {
 	return "discovery cache"
 }
 
-func (m *manager) Error() error {
+func (*manager) Error() error {
 	return nil
 }
 
diff --git a/lib/model/testutils_test.go b/lib/model/testutils_test.go
index 58bc06233..0ec044eca 100644
--- a/lib/model/testutils_test.go
+++ b/lib/model/testutils_test.go
@@ -229,7 +229,7 @@ func (c *alwaysChanged) Seen(fs fs.Filesystem, name string) bool {
 	return ok
 }
 
-func (c *alwaysChanged) Changed() bool {
+func (*alwaysChanged) Changed() bool {
 	return true
 }