diff --git a/widgets/gauge/gauge.go b/widgets/gauge/gauge.go
index feca8fb..bc3e92a 100644
--- a/widgets/gauge/gauge.go
+++ b/widgets/gauge/gauge.go
@@ -163,14 +163,10 @@ func (g *Gauge) progressText() string {
 		return ""
 	}
 
-	switch g.pt {
-	case progressTypePercent:
+	if g.pt == progressTypePercent {
 		return fmt.Sprintf("%d%%", g.current)
-	case progressTypeAbsolute:
-		return fmt.Sprintf("%d/%d", g.current, g.total)
-	default:
-		return ""
 	}
+	return fmt.Sprintf("%d/%d", g.current, g.total)
 }
 
 // gaugeText returns full text to be displayed within the gauge, i.e. the
diff --git a/widgets/gauge/gauge_test.go b/widgets/gauge/gauge_test.go
index f05a13f..ec80ca5 100644
--- a/widgets/gauge/gauge_test.go
+++ b/widgets/gauge/gauge_test.go
@@ -15,6 +15,7 @@
 package gauge
 
 import (
+	"fmt"
 	"image"
 	"testing"
 
@@ -27,6 +28,7 @@ import (
 	"github.com/mum4k/termdash/internal/draw/testdraw"
 	"github.com/mum4k/termdash/internal/faketerm"
 	"github.com/mum4k/termdash/linestyle"
+	"github.com/mum4k/termdash/terminal/terminalapi"
 	"github.com/mum4k/termdash/widgetapi"
 )
 
@@ -67,6 +69,58 @@ func TestGauge(t *testing.T) {
 			},
 			wantErr: true,
 		},
+		{
+			desc: "fails on negative height",
+			opts: []Option{
+				Height(-1),
+			},
+			canvas: image.Rect(0, 0, 10, 3),
+			want: func(size image.Point) *faketerm.Terminal {
+				return faketerm.MustNew(size)
+			},
+			wantErr: true,
+		},
+		{
+			desc: "gauge without progress text",
+			opts: []Option{
+				Char('o'),
+				HideTextProgress(),
+			},
+			percent: &percentCall{p: 35},
+			canvas:  image.Rect(0, 0, 10, 3),
+			want: func(size image.Point) *faketerm.Terminal {
+				ft := faketerm.MustNew(size)
+				c := testcanvas.MustNew(ft.Area())
+
+				testdraw.MustRectangle(c, image.Rect(0, 0, 3, 3),
+					draw.RectChar('o'),
+					draw.RectCellOpts(cell.BgColor(cell.ColorGreen)),
+				)
+				testcanvas.MustApply(c, ft)
+				return ft
+			},
+		},
+		{
+			desc: "sets gauge color",
+			opts: []Option{
+				Char('o'),
+				HideTextProgress(),
+				Color(cell.ColorBlue),
+			},
+			percent: &percentCall{p: 35},
+			canvas:  image.Rect(0, 0, 10, 3),
+			want: func(size image.Point) *faketerm.Terminal {
+				ft := faketerm.MustNew(size)
+				c := testcanvas.MustNew(ft.Area())
+
+				testdraw.MustRectangle(c, image.Rect(0, 0, 3, 3),
+					draw.RectChar('o'),
+					draw.RectCellOpts(cell.BgColor(cell.ColorBlue)),
+				)
+				testcanvas.MustApply(c, ft)
+				return ft
+			},
+		},
 		{
 			desc: "gauge showing percentage",
 			opts: []Option{
@@ -87,6 +141,24 @@ func TestGauge(t *testing.T) {
 				return ft
 			},
 		},
+		{
+			desc: "fails when Percent is less than zero",
+			opts: []Option{
+				Char('o'),
+			},
+			percent:       &percentCall{p: -1},
+			canvas:        image.Rect(0, 0, 10, 3),
+			wantUpdateErr: true,
+		},
+		{
+			desc: "fails when Percent is more than 100",
+			opts: []Option{
+				Char('o'),
+			},
+			percent:       &percentCall{p: 101},
+			canvas:        image.Rect(0, 0, 10, 3),
+			wantUpdateErr: true,
+		},
 		{
 			desc: "draws resize needed character when canvas is smaller than requested",
 			opts: []Option{
@@ -315,6 +387,33 @@ func TestGauge(t *testing.T) {
 				return ft
 			},
 		},
+		{
+			desc: "fails when Absolute done is negative",
+			opts: []Option{
+				Char('o'),
+			},
+			absolute:      &absoluteCall{done: -1, total: 100},
+			canvas:        image.Rect(0, 0, 10, 3),
+			wantUpdateErr: true,
+		},
+		{
+			desc: "fails when Absolute total is zero",
+			opts: []Option{
+				Char('o'),
+			},
+			absolute:      &absoluteCall{done: 0, total: 0},
+			canvas:        image.Rect(0, 0, 10, 3),
+			wantUpdateErr: true,
+		},
+		{
+			desc: "fails when Absolute total is less than done",
+			opts: []Option{
+				Char('o'),
+			},
+			absolute:      &absoluteCall{done: 10, total: 5},
+			canvas:        image.Rect(0, 0, 10, 3),
+			wantUpdateErr: true,
+		},
 		{
 			desc: "gauge without text progress",
 			opts: []Option{
@@ -804,6 +903,46 @@ func TestGauge(t *testing.T) {
 	}
 }
 
+func TestKeyboard(t *testing.T) {
+	g, err := New()
+	if err != nil {
+		t.Fatalf("New => unexpected error: %v", err)
+	}
+	if err := g.Keyboard(&terminalapi.Keyboard{}); err == nil {
+		t.Errorf("Keyboard => got nil err, wanted one")
+	}
+}
+
+func TestMouse(t *testing.T) {
+	g, err := New()
+	if err != nil {
+		t.Fatalf("New => unexpected error: %v", err)
+	}
+	if err := g.Mouse(&terminalapi.Mouse{}); err == nil {
+		t.Errorf("Mouse => got nil err, wanted one")
+	}
+}
+
+func TestProgressTypeString(t *testing.T) {
+	tests := []struct {
+		pt   progressType
+		want string
+	}{
+		{progressType(-1), "progressTypeUnknown"},
+		{progressTypePercent, "progressTypePercent"},
+		{progressTypeAbsolute, "progressTypeAbsolute"},
+	}
+
+	for i, tc := range tests {
+		t.Run(fmt.Sprintf("case(%d)", i), func(t *testing.T) {
+			got := tc.pt.String()
+			if tc.want != got {
+				t.Errorf("String => %q, want %q", got, tc.want)
+			}
+		})
+	}
+}
+
 func TestOptions(t *testing.T) {
 	tests := []struct {
 		desc string