diff --git a/internal/cnf/parser/nginx/decoder.go b/internal/cnf/parser/nginx/decoder.go
index 2cc8f79..8cb9a3e 100644
--- a/internal/cnf/parser/nginx/decoder.go
+++ b/internal/cnf/parser/nginx/decoder.go
@@ -155,12 +155,3 @@ func (d *Decoder) Decode(v interface{}) error {
 	return nil
 
 }
-
-func inArray(haystack string, needle byte) bool {
-	for i, l := 0, len(haystack); i < l; i++ {
-		if haystack[i] == needle {
-			return true
-		}
-	}
-	return false
-}
diff --git a/internal/cnf/parser/nginx/decoder_test.go b/internal/cnf/parser/nginx/decoder_test.go
index 6b8b35a..b4d40fa 100644
--- a/internal/cnf/parser/nginx/decoder_test.go
+++ b/internal/cnf/parser/nginx/decoder_test.go
@@ -1,6 +1,7 @@
 package nginx
 
 import (
+	"errors"
 	"strings"
 	"testing"
 )
@@ -160,3 +161,68 @@ func TestNestedSections(t *testing.T) {
 
 	}
 }
+
+func TestReceiverAndSyntaxErrors(t *testing.T) {
+	tests := []struct {
+		Receiver interface{}
+		Input    string
+		Err      error
+	}{
+		{new(Line), "", nil},
+		{nil, "", ErrNullReceiver},
+		{[]byte{}, "", ErrInvalidReceiver},
+
+		{new(Line), "}", &LineError{0, ErrUnexpectedSectionClose}},
+		{new(Line), "key valuewithoutsemicolon", &LineError{0, ErrInvalidSyntax}},
+		{new(Line), "section {\nkey value;", ErrUnclosedSection},
+	}
+
+	for i, test := range tests {
+
+		// create reader
+		r := strings.NewReader(test.Input)
+
+		// parse input
+		var receiver interface{} = test.Receiver
+		decoder := NewDecoder(r)
+		err := decoder.Decode(receiver)
+		if err == nil {
+			if test.Err != nil {
+				t.Errorf("[%d] expected error", i)
+			}
+			continue
+		}
+
+		if err.Error() != test.Err.Error() {
+			t.Errorf("[%d] expected error <%s>, got <%s>", i, test.Err, err)
+			continue
+		}
+
+	}
+}
+
+var readerError = errors.New("error")
+
+type defectiveReader struct{}
+
+func (d defectiveReader) Read(buf []byte) (int, error) {
+	return 0, readerError
+}
+func TestReadErrors(t *testing.T) {
+
+	// create reader
+	r := &defectiveReader{}
+
+	// parse input
+	receiver := new(Line)
+	decoder := NewDecoder(r)
+	err := decoder.Decode(receiver)
+	if err == nil {
+		t.Fatalf("expected error")
+	}
+
+	if err.Error() != (&LineError{0, readerError}).Error() {
+		t.Fatalf("expected error <%s>, got <%s>", &LineError{0, readerError}, err)
+	}
+
+}