diff --git a/internal/mempool/reactor.go b/internal/mempool/reactor.go
index 88e69454f..3f62f958e 100644
--- a/internal/mempool/reactor.go
+++ b/internal/mempool/reactor.go
@@ -58,7 +58,7 @@ func NewReactor(
 		p2pClient:    p2pClient,
 		peerEvents:   peerEvents,
 		peerRoutines: make(map[types.NodeID]context.CancelFunc),
-		observePanic: func(i interface{}) {},
+		observePanic: func(_i interface{}) {},
 	}
 
 	r.BaseService = *service.NewBaseService(logger, "Mempool", r)
diff --git a/internal/mempool/reactor_test.go b/internal/mempool/reactor_test.go
index d857c68e1..691324e72 100644
--- a/internal/mempool/reactor_test.go
+++ b/internal/mempool/reactor_test.go
@@ -74,7 +74,7 @@ func setupReactors(ctx context.Context, t *testing.T, logger log.Logger, numNode
 			cfg.Mempool,
 			mempool,
 			rts.network.Nodes[nodeID].Client,
-			func(ctx context.Context, n string) *p2p.PeerUpdates { return rts.peerUpdates[nodeID] },
+			func(_ctx context.Context, _n string) *p2p.PeerUpdates { return rts.peerUpdates[nodeID] },
 		)
 		rts.nodes = append(rts.nodes, nodeID)
 
@@ -146,7 +146,7 @@ func TestReactorBroadcastDoesNotPanic(t *testing.T) {
 	logger := log.NewNopLogger()
 	rts := setupReactors(ctx, t, logger, numNodes, 0)
 
-	observePanic := func(r interface{}) {
+	observePanic := func(_r interface{}) {
 		t.Fatal("panic detected in reactor")
 	}
 
diff --git a/internal/mempool/types.go b/internal/mempool/types.go
index 28b3dc7f3..48dc52041 100644
--- a/internal/mempool/types.go
+++ b/internal/mempool/types.go
@@ -131,7 +131,7 @@ func PreCheckMaxBytes(maxBytes int64) PreCheckFunc {
 // PostCheckMaxGas checks that the wanted gas is smaller or equal to the passed
 // maxGas. Returns nil if maxGas is -1.
 func PostCheckMaxGas(maxGas int64) PostCheckFunc {
-	return func(tx types.Tx, res *abci.ResponseCheckTx) error {
+	return func(_tx types.Tx, res *abci.ResponseCheckTx) error {
 		if maxGas == -1 {
 			return nil
 		}