diff --git a/engine/resources/packagekit/packagekit.go b/engine/resources/packagekit/packagekit.go
index 9ac7c6ea1..27f29e48c 100644
--- a/engine/resources/packagekit/packagekit.go
+++ b/engine/resources/packagekit/packagekit.go
@@ -208,7 +208,7 @@ func (obj *Conn) matchSignal(ch chan *dbus.Signal, path dbus.ObjectPath, iface s
 	// TODO: if we make this call many times, we seem to receive signals
 	// that many times... Maybe this should be an object singleton?
 	var call *dbus.Call
-	pathStr := fmt.Sprintf("%s", path)
+	pathStr := path
 	if len(signals) == 0 {
 		args := fmt.Sprintf("type='signal', path='%s', interface='%s'", pathStr, iface)
 		argsList = append(argsList, args)
diff --git a/lang/ast/structs.go b/lang/ast/structs.go
index c46208fb2..cb9189d7e 100644
--- a/lang/ast/structs.go
+++ b/lang/ast/structs.go
@@ -6566,7 +6566,7 @@ func (obj *ExprFunc) String() string {
 
 	var a []string
 	for _, x := range obj.Args {
-		a = append(a, fmt.Sprintf("%s", x.String()))
+		a = append(a, x.String())
 	}
 	args := strings.Join(a, ", ")
 	s := fmt.Sprintf("func(%s)", args)
@@ -7213,7 +7213,7 @@ func (obj *ExprFunc) Graph() (*pgraph.Graph, error) {
 		var once bool
 		edgeGenFn := func(v1, v2 pgraph.Vertex) pgraph.Edge {
 			if once {
-				panic(fmt.Sprintf("edgeGenFn for func was called twice"))
+				panic("edgeGenFn for func was called twice")
 			}
 			once = true
 			return edge
@@ -7332,7 +7332,7 @@ type ExprCall struct {
 func (obj *ExprCall) String() string {
 	var s []string
 	for _, x := range obj.Args {
-		s = append(s, fmt.Sprintf("%s", x.String()))
+		s = append(s, x.String())
 	}
 	return fmt.Sprintf("call:%s(%s)", obj.Name, strings.Join(s, ", "))
 }
diff --git a/pgraph/util_test.go b/pgraph/util_test.go
index 75d3a81a5..7b92441c7 100644
--- a/pgraph/util_test.go
+++ b/pgraph/util_test.go
@@ -74,7 +74,7 @@ func runGraphCmp(t *testing.T, g1, g2 *Graph) string {
 		str := ""
 		str += fmt.Sprintf("  actual (g1): %v%s", g1, fullPrint(g1))
 		str += fmt.Sprintf("expected (g2): %v%s", g2, fullPrint(g2))
-		str += fmt.Sprintf("cmp error:")
+		str += "cmp error:"
 		str += fmt.Sprintf("%v", err)
 		return str
 	}