diff --git a/keysparsing.go b/keysparsing.go
index 9707c68..0da938b 100644
--- a/keysparsing.go
+++ b/keysparsing.go
@@ -23,19 +23,19 @@ var escapeSequenceMap = map[rune]rune{
 type parseKeyState int
 
 const (
-	BARE parseKeyState = iota
-	BASIC
-	LITERAL
-	ESC
-	UNICODE_4
-	UNICODE_8
+	bare parseKeyState = iota
+	basic
+	literal
+	esc
+	unicode4
+	unicode8
 )
 
 func parseKey(key string) ([]string, error) {
 	groups := []string{}
 	var buffer bytes.Buffer
 	var hex bytes.Buffer
-	state := BARE
+	state := bare
 	wasInQuotes := false
 	ignoreSpace := true
 	expectDot := false
@@ -48,66 +48,66 @@ func parseKey(key string) ([]string, error) {
 			ignoreSpace = false
 		}
 
-		if state == ESC {
+		if state == esc {
 			if char == 'u' {
-				state = UNICODE_4
+				state = unicode4
 				hex.Reset()
 			} else if char == 'U' {
-				state = UNICODE_8
+				state = unicode8
 				hex.Reset()
 			} else if newChar, ok := escapeSequenceMap[char]; ok {
 				buffer.WriteRune(newChar)
-				state = BASIC
+				state = basic
 			} else {
 				return nil, fmt.Errorf(`invalid escape sequence \%c`, char)
 			}
 			continue
 		}
 
-		if state == UNICODE_4 || state == UNICODE_8 {
+		if state == unicode4 || state == unicode8 {
 			if isHexDigit(char) {
 				hex.WriteRune(char)
 			}
-			if (state == UNICODE_4 && hex.Len() == 4) || (state == UNICODE_8 && hex.Len() == 8) {
+			if (state == unicode4 && hex.Len() == 4) || (state == unicode8 && hex.Len() == 8) {
 				if value, err := strconv.ParseInt(hex.String(), 16, 32); err == nil {
 					buffer.WriteRune(rune(value))
 				} else {
 					return nil, err
 				}
-				state = BASIC
+				state = basic
 			}
 			continue
 		}
 
 		switch char {
 		case '\\':
-			if state == BASIC {
-				state = ESC
-			} else if state == LITERAL {
+			if state == basic {
+				state = esc
+			} else if state == literal {
 				buffer.WriteRune(char)
 			}
 		case '\'':
-			if state == BARE {
-				state = LITERAL
-			} else if state == LITERAL {
+			if state == bare {
+				state = literal
+			} else if state == literal {
 				groups = append(groups, buffer.String())
 				buffer.Reset()
 				wasInQuotes = true
-				state = BARE
+				state = bare
 			}
 			expectDot = false
 		case '"':
-			if state == BARE {
-				state = BASIC
-			} else if state == BASIC {
+			if state == bare {
+				state = basic
+			} else if state == basic {
 				groups = append(groups, buffer.String())
 				buffer.Reset()
-				state = BARE
+				state = bare
 				wasInQuotes = true
 			}
 			expectDot = false
 		case '.':
-			if state != BARE {
+			if state != bare {
 				buffer.WriteRune(char)
 			} else {
 				if !wasInQuotes {
@@ -122,13 +122,13 @@ func parseKey(key string) ([]string, error) {
 				wasInQuotes = false
 			}
 		case ' ':
-			if state == BASIC {
+			if state == basic {
 				buffer.WriteRune(char)
 			} else {
 				expectDot = true
 			}
 		default:
-			if state == BARE {
+			if state == bare {
 				if !isValidBareChar(char) {
 					return nil, fmt.Errorf("invalid bare character: %c", char)
 				} else if expectDot {
@@ -140,10 +140,10 @@ func parseKey(key string) ([]string, error) {
 		}
 	}
 
-	// state must be BARE at the end
-	if state == ESC {
+	// state must be bare at the end
+	if state == esc {
 		return nil, errors.New("unfinished escape sequence")
-	} else if state != BARE {
+	} else if state != bare {
 		return nil, errors.New("mismatched quotes")
 	}
 
diff --git a/marshal.go b/marshal.go
index e6281e9..6280225 100644
--- a/marshal.go
+++ b/marshal.go
@@ -472,21 +472,18 @@ func (d *Decoder) valueFromToml(mtype reflect.Type, tval interface{}) (reflect.V
 	case *Tree:
 		if isTree(mtype) {
 			return d.valueFromTree(mtype, tval.(*Tree))
-		} else {
-			return reflect.ValueOf(nil), fmt.Errorf("Can't convert %v(%T) to a tree", tval, tval)
 		}
+		return reflect.ValueOf(nil), fmt.Errorf("Can't convert %v(%T) to a tree", tval, tval)
 	case []*Tree:
 		if isTreeSlice(mtype) {
 			return d.valueFromTreeSlice(mtype, tval.([]*Tree))
-		} else {
-			return reflect.ValueOf(nil), fmt.Errorf("Can't convert %v(%T) to trees", tval, tval)
 		}
+		return reflect.ValueOf(nil), fmt.Errorf("Can't convert %v(%T) to trees", tval, tval)
 	case []interface{}:
 		if isOtherSlice(mtype) {
 			return d.valueFromOtherSlice(mtype, tval.([]interface{}))
-		} else {
-			return reflect.ValueOf(nil), fmt.Errorf("Can't convert %v(%T) to a slice", tval, tval)
 		}
+		return reflect.ValueOf(nil), fmt.Errorf("Can't convert %v(%T) to a slice", tval, tval)
 	default:
 		switch mtype.Kind() {
 		case reflect.Bool:
diff --git a/marshal_test.go b/marshal_test.go
index 82268aa..291a80d 100644
--- a/marshal_test.go
+++ b/marshal_test.go
@@ -146,8 +146,8 @@ var docData = testDoc{
 		Second: &subdoc,
 	},
 	SubDocList: []testSubDoc{
-		testSubDoc{"List.First", 0},
-		testSubDoc{"List.Second", 0},
+		{"List.First", 0},
+		{"List.Second", 0},
 	},
 	SubDocPtrs: []*testSubDoc{&subdoc},
 }
@@ -530,7 +530,7 @@ var strPtr = []*string{&str1, &str2}
 var strPtr2 = []*[]*string{&strPtr}
 
 var nestedTestData = nestedMarshalTestStruct{
-	String:    [][]string{[]string{"Five", "Six"}, []string{"One", "Two"}},
+	String:    [][]string{{"Five", "Six"}, {"One", "Two"}},
 	StringPtr: &strPtr2,
 }
 
diff --git a/tomltree_create_test.go b/tomltree_create_test.go
index 1ca108a..3465a10 100644
--- a/tomltree_create_test.go
+++ b/tomltree_create_test.go
@@ -60,7 +60,7 @@ func TestTreeCreateToTree(t *testing.T) {
 		},
 		"array":                 []string{"a", "b", "c"},
 		"array_uint":            []uint{uint(1), uint(2)},
-		"array_table":           []map[string]interface{}{map[string]interface{}{"sub_map": 52}},
+		"array_table":           []map[string]interface{}{{"sub_map": 52}},
 		"array_times":           []time.Time{time.Now(), time.Now()},
 		"map_times":             map[string]time.Time{"now": time.Now()},
 		"custom_string_map_key": map[customString]interface{}{customString("custom"): "custom"},
@@ -97,7 +97,7 @@ func TestTreeCreateToTreeInvalidArrayMemberType(t *testing.T) {
 }
 
 func TestTreeCreateToTreeInvalidTableGroupType(t *testing.T) {
-	_, err := TreeFromMap(map[string]interface{}{"foo": []map[string]interface{}{map[string]interface{}{"hello": t}}})
+	_, err := TreeFromMap(map[string]interface{}{"foo": []map[string]interface{}{{"hello": t}}})
 	expected := "cannot convert type *testing.T to Tree"
 	if err.Error() != expected {
 		t.Fatalf("expected error %s, got %s", expected, err.Error())