diff --git a/bisect_test.go b/bisect_test.go
index 0baed7c..ff51c2f 100644
--- a/bisect_test.go
+++ b/bisect_test.go
@@ -11,11 +11,11 @@ func TestBisectRight(t *testing.T) {
 
 	r := BisectRight(in, 0)
 	if r != 0 {
-		t.Error("number 0 should inserted at 0 position, but got %d", r)
+		t.Errorf("number 0 should inserted at 0 position, but got %d", r)
 	}
 
 	r = BisectRight(in, 4)
 	if r != 5 {
-		t.Error("number 4 should inserted at 5 position, but got %d", r)
+		t.Errorf("number 4 should inserted at 5 position, but got %d", r)
 	}
 }
diff --git a/document_test.go b/document_test.go
index ca04716..001dad0 100644
--- a/document_test.go
+++ b/document_test.go
@@ -382,12 +382,12 @@ func TestDocument_OnLastLine(t *testing.T) {
 		CursorPosition: len("line 1\nline"),
 	}
 	ac := d.OnLastLine()
-	if ac != false {
+	if ac {
 		t.Errorf("Should be %#v, got %#v", false, ac)
 	}
 	d.CursorPosition = len("line 1\nline 2\nline")
 	ac = d.OnLastLine()
-	if ac != true {
+	if !ac {
 		t.Errorf("Should be %#v, got %#v", true, ac)
 	}
 }
diff --git a/vt100_input.go b/vt100_input.go
index daf965b..155f3cc 100644
--- a/vt100_input.go
+++ b/vt100_input.go
@@ -54,7 +54,7 @@ func (t *VT100Parser) setRawMode() error {
 	n.Lflag &^= syscall.ECHO | syscall.ICANON | syscall.IEXTEN | syscall.ISIG
 	n.Cc[syscall.VMIN] = 1
 	n.Cc[syscall.VTIME] = 0
-	termios.Tcsetattr(uintptr(t.fd), termios.TCSANOW, (*syscall.Termios)(&n))
+	termios.Tcsetattr(uintptr(t.fd), termios.TCSANOW, &n)
 	return nil
 }
 
@@ -67,7 +67,7 @@ func (t *VT100Parser) resetRawMode() error {
 
 func (t *VT100Parser) GetKey(b []byte) Key {
 	for _, k := range asciiSequences {
-		if bytes.Compare(k.ASCIICode, b) == 0 {
+		if bytes.Equal(k.ASCIICode, b) {
 			return k.Key
 		}
 	}
diff --git a/vt100_output.go b/vt100_output.go
index fd7349d..12c6fd9 100644
--- a/vt100_output.go
+++ b/vt100_output.go
@@ -195,11 +195,11 @@ func (w *VT100Writer) ClearTitle() {
 func (w *VT100Writer) SetColor(fg, bg Color, bold bool) {
 	f, ok := foregroundANSIColors[fg]
 	if !ok {
-		f, _ = foregroundANSIColors[DefaultColor]
+		f = foregroundANSIColors[DefaultColor]
 	}
 	b, ok := backgroundANSIColors[bg]
 	if !ok {
-		b, _ = backgroundANSIColors[DefaultColor]
+		b = backgroundANSIColors[DefaultColor]
 	}
 	syscall.Write(syscall.Stdout, []byte{0x1b, 0x5b, 0x33, 0x39, 0x3b, 0x34, 0x39, 0x6d})
 	w.WriteRaw([]byte{0x1b, 0x5b})