diff --git a/func.go b/func.go
index e770bd5..ee0ba9a 100644
--- a/func.go
+++ b/func.go
@@ -180,7 +180,7 @@ func (f *funcMockerGeneratorHelper) generateMockOutputsMethod() jen.Code {
 		Params(jen.Id("m").Op("*").Id(f.getMockerStructName())).
 		Id("MockOutputs").
 		Params(
-			append([]jen.Code{jen.Id("nTimes").Int()}, f.generateOutputParamSignature(true)...)...
+			append([]jen.Code{jen.Id("nTimes").Int()}, f.generateOutputParamSignature(true)...)...,
 		).Block(
 		jen.Id("m").Dot("Mock").Call(
 			jen.Id("nTimes"),
@@ -239,7 +239,7 @@ func (f *funcMockerGeneratorHelper) generateMockOutputsOnceMethod() jen.Code {
 		Params(f.generateOutputParamSignature(true)...).
 		Block(
 			jen.Id("m").Dot("MockOutputs").Call(
-				append([]jen.Code{jen.Lit(1)}, f.generateOutputList(true)...)...
+				append([]jen.Code{jen.Lit(1)}, f.generateOutputList(true)...)...,
 			),
 		)
 }
@@ -251,7 +251,7 @@ func (f *funcMockerGeneratorHelper) generateMockOutputsForeverMethod() jen.Code
 		Params(f.generateOutputParamSignature(true)...).
 		Block(
 			jen.Id("m").Dot("MockOutputs").Call(
-				append([]jen.Code{jen.Lit(0)}, f.generateOutputList(true)...)...
+				append([]jen.Code{jen.Lit(0)}, f.generateOutputList(true)...)...,
 			),
 		)
 }
@@ -262,7 +262,7 @@ func (f *funcMockerGeneratorHelper) generateMockDefaultsMethod() jen.Code {
 		Id("MockDefaults").
 		Params(jen.Id("nTimes").Int())
 
-	body := make([]jen.Code, 0, 0)
+	body := make([]jen.Code, 0)
 
 	for i, field := range f.funcType.Outputs {
 		body = append(
diff --git a/interface.go b/interface.go
index dd3c002..16ce37f 100644
--- a/interface.go
+++ b/interface.go
@@ -117,7 +117,7 @@ func (s *interfaceMockerGeneratorHelper) generateMockedInterfaceImpl() jen.Code
 }
 
 func (s *interfaceMockerGeneratorHelper) generateInterfaceMockerConstructor() jen.Code {
-	values := make([]jen.Code, 0, 0)
+	values := make([]jen.Code, 0)
 	for _, method := range s.interfaceType.Methods {
 		name := method.Name
 		values = append(
diff --git a/util.go b/util.go
index 3193652..70cf88f 100644
--- a/util.go
+++ b/util.go
@@ -59,9 +59,9 @@ func parseInt(s string) (int, bool) {
 	n := 0
 	for i := 0; i < len(s); i++ {
 		switch {
-		case base >= 10 && s[i] >= 'a' && s[i] < 'a' + base - 10:
+		case base >= 10 && s[i] >= 'a' && s[i] < 'a'+base-10:
 			n = n*int(base) + int(s[i]) - 'a' + 10
-		case base >= 10 && s[i] >= 'A' && s[i] < 'A' + base - 10:
+		case base >= 10 && s[i] >= 'A' && s[i] < 'A'+base-10:
 			n = n*int(base) + int(s[i]) - 'A' + 10
 		case s[i] >= '0' && s[i] < '0'+maxUint8(base, 10):
 			n = n*int(base) + int(s[i]) - '0'
@@ -77,7 +77,7 @@ func maxUint8(a, b uint8) uint8 {
 	return b
 }
 
-type stepFunc func() (jen.Code, )
+type stepFunc func() jen.Code
 
 func concatSteps(steps ...stepFunc) jen.Code {
 	j := jen.Empty()