diff --git a/README.md b/README.md
index a62cfaa..ecdf0b9 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![PkgGoDev](https://pkg.go.dev/badge/image)](https://pkg.go.dev/github.com/ncruces/zenity)
 [![Go Report](https://goreportcard.com/badge/github.com/ncruces/zenity)](https://goreportcard.com/report/github.com/ncruces/zenity)
+[![Go Report](http://gocover.io/_badge/github.com/ncruces/zenity)](https://gocover.io/github.com/ncruces/zenity)
 
 This repo includes both a cross-platform Go package providing
 [Zenity](https://help.gnome.org/users/zenity/stable/)-like dialogs
diff --git a/file.go b/file.go
index 23b27c0..0ea5dab 100644
--- a/file.go
+++ b/file.go
@@ -270,7 +270,6 @@ func isUniformTypeIdentifier(pattern string) bool {
 
 func splitDirAndName(path string) (dir, name string) {
 	if path != "" {
-		path = filepath.Clean(path)
 		fi, err := os.Stat(path)
 		if err == nil && fi.IsDir() {
 			return path, ""
diff --git a/file_filter_test.go b/file_filter_test.go
index 53dc4d6..4b7e214 100644
--- a/file_filter_test.go
+++ b/file_filter_test.go
@@ -5,6 +5,23 @@ import (
 	"testing"
 )
 
+func TestFileFilters_name(t *testing.T) {
+	tests := []struct {
+		data FileFilters
+		want string
+	}{
+		{FileFilters{{"", []string{`*.png`}}}, "*.png"},
+		{FileFilters{{"", []string{`*.png`, `*.jpg`}}}, "*.png *.jpg"},
+		{FileFilters{{"Image files", []string{`*.png`, `*.jpg`}}}, "Image files"},
+	}
+	for i, tt := range tests {
+		tt.data.name()
+		if got := tt.data[0].Name; got != tt.want {
+			t.Errorf("FileFilters.name[%d] = %q, want %q", i, got, tt.want)
+		}
+	}
+}
+
 func TestFileFilters_simplify(t *testing.T) {
 	tests := []struct {
 		data FileFilters
@@ -54,10 +71,11 @@ func TestFileFilters_types(t *testing.T) {
 		{FileFilters{{"", []string{`*.[\[]PNG`}}}, []string{"", "[PNG"}},
 		{FileFilters{{"", []string{`*.[\]]PNG`}}}, []string{"", "]PNG"}},
 		{FileFilters{{"", []string{`public.png`}}}, []string{"", "public.png"}},
+		{FileFilters{{"", []string{`-public-.png`}}}, []string{"", "png"}},
 	}
 	for i, tt := range tests {
 		if got := tt.data.types(); !reflect.DeepEqual(got, tt.want) {
-			t.Fatalf("FileFilters.types[%d] = %v, want %v", i, got, tt.want)
+			t.Errorf("FileFilters.types[%d] = %v, want %v", i, got, tt.want)
 		}
 	}
 }
diff --git a/file_util_test.go b/file_util_test.go
new file mode 100644
index 0000000..ecdd451
--- /dev/null
+++ b/file_util_test.go
@@ -0,0 +1,37 @@
+package zenity
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func Test_splitDirAndName(t *testing.T) {
+	tempDir := os.TempDir()
+	tests := []struct {
+		path     string
+		wantDir  string
+		wantName string
+	}{
+		// filepath.Split test cases
+		{"a/b", "a/", "b"},
+		{"a/b/", "a/b/", ""},
+		{"a/", "a/", ""},
+		{"a", "", "a"},
+		{"/", "/", ""},
+		// we split differently if we know it's a directory
+		{tempDir, tempDir, ""},
+		{filepath.Clean(tempDir), filepath.Clean(tempDir), ""},
+		{filepath.Join(tempDir, "a"), filepath.Clean(tempDir) + string(filepath.Separator), "a"},
+	}
+
+	for i, tt := range tests {
+		gotDir, gotName := splitDirAndName(tt.path)
+		if gotDir != tt.wantDir {
+			t.Errorf("splitDirAndName[%d].dir = %q, want %q", i, gotDir, tt.wantDir)
+		}
+		if gotName != tt.wantName {
+			t.Errorf("splitDirAndName[%d].name = %q, want %q", i, gotName, tt.wantName)
+		}
+	}
+}
diff --git a/internal/zenutil/color.go b/internal/zenutil/color.go
index 0cd82a7..8388270 100644
--- a/internal/zenutil/color.go
+++ b/internal/zenutil/color.go
@@ -47,8 +47,11 @@ func ParseColor(s string) color.Color {
 		}
 	}
 
-	c, _ := colornames.Map[strings.ToLower(s)]
-	return c
+	c, ok := colornames.Map[strings.ToLower(s)]
+	if ok {
+		return c
+	}
+	return nil
 }
 
 // UnparseColor is internal.
diff --git a/internal/zenutil/color_test.go b/internal/zenutil/color_test.go
index 6c1210a..6993630 100644
--- a/internal/zenutil/color_test.go
+++ b/internal/zenutil/color_test.go
@@ -7,7 +7,7 @@ import (
 	"golang.org/x/image/colornames"
 )
 
-func TestColor(t *testing.T) {
+func TestColor_names(t *testing.T) {
 	tests := []string{
 		"chocolate",
 		"lime",
@@ -17,20 +17,73 @@ func TestColor(t *testing.T) {
 		"salmon",
 		"tomato",
 	}
-	eq := func(c1, c2 color.Color) bool {
-		r1, g1, b1, a1 := c1.RGBA()
-		r2, g2, b2, a2 := c2.RGBA()
-		return r1 == r2 && g1 == g2 && b1 == b2 && a1 == a2
-	}
 	for _, test := range tests {
 		c1 := colornames.Map[test]
 		c2 := ParseColor(test)
-		c3 := ParseColor(UnparseColor(c2))
-		if !eq(c1, c2) {
+		c3 := ParseColor(UnparseColor(c1))
+		if !colorEq(c1, c2) {
 			t.Errorf("ParseColor(%s) = %v, want %v", test, c2, c1)
 		}
-		if !eq(c1, c3) {
-			t.Errorf("ParseColor(UnparseColor(%s)) = %v, want %v", test, c3, c1)
+		if !colorEq(c1, c3) {
+			t.Errorf("ParseColor(UnparseColor(%v)) = %v, want %v", c1, c3, c1)
 		}
 	}
 }
+
+func TestColor_colors(t *testing.T) {
+	tests := []color.Color{
+		color.Black,
+		color.White,
+		color.Opaque,
+		color.Transparent,
+	}
+	for _, test := range tests {
+		c := ParseColor(UnparseColor(test))
+		if !colorEq(c, test) {
+			t.Errorf("ParseColor(UnparseColor(%v)) = %v, want %v", test, c, test)
+		}
+	}
+}
+
+func TestColor_strings(t *testing.T) {
+	tests := []struct {
+		data string
+		want color.Color
+	}{
+		{"#000", color.Black},
+		{"#000f", color.Black},
+		{"#000000", color.Black},
+		{"#000000ff", color.Black},
+		{"#fff", color.White},
+		{"#ffff", color.White},
+		{"#ffffff", color.White},
+		{"#ffffffff", color.White},
+		{"#FFF", color.Opaque},
+		{"#FFFF", color.Opaque},
+		{"#FFFFFF", color.Opaque},
+		{"#FFFFFFFF", color.Opaque},
+		{"#0000", color.Transparent},
+		{"#00000000", color.Transparent},
+		{"#8888", color.NRGBA{0x88, 0x88, 0x88, 0x88}},
+		{"#80808080", color.NRGBA{0x80, 0x80, 0x80, 0x80}},
+		{"rgb(128,128,128)", color.NRGBA{0x80, 0x80, 0x80, 0xff}},
+		{"rgba(128,128,128,0.5)", color.NRGBA{0x80, 0x80, 0x80, 0x80}},
+		{"rgba(128,128,128,1.0)", color.NRGBA{0x80, 0x80, 0x80, 0xff}},
+		{"not a color", nil},
+	}
+	for _, test := range tests {
+		c := ParseColor(test.data)
+		if !colorEq(c, test.want) {
+			t.Errorf("ParseColor(%s) = %v, want %v", test.data, c, test.want)
+		}
+	}
+}
+
+func colorEq(c1, c2 color.Color) bool {
+	if c1 == nil || c2 == nil {
+		return c1 == c2
+	}
+	r1, g1, b1, a1 := c1.RGBA()
+	r2, g2, b2, a2 := c2.RGBA()
+	return r1 == r2 && g1 == g2 && b1 == b2 && a1 == a2
+}
diff --git a/internal/zenutil/run_unix_test.go b/internal/zenutil/run_unix_test.go
new file mode 100644
index 0000000..fda5c0c
--- /dev/null
+++ b/internal/zenutil/run_unix_test.go
@@ -0,0 +1,53 @@
+// +build !windows,!darwin
+
+package zenutil
+
+import (
+	"context"
+	"errors"
+	"os"
+	"os/exec"
+	"testing"
+)
+
+func TestRun(t *testing.T) {
+	_, err := Run(nil, []string{"--version"})
+	if err, skip := skip(err); skip {
+		t.Skip("skipping:", err)
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestRun_context(t *testing.T) {
+	_, err := Run(context.TODO(), []string{"--version"})
+	if err, skip := skip(err); skip {
+		t.Skip("skipping:", err)
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestRunProgress(t *testing.T) {
+	_, err := RunProgress(nil, 100, nil, []string{"--version"})
+	if err, skip := skip(err); skip {
+		t.Skip("skipping:", err)
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func skip(err error) (error, bool) {
+	if _, ok := err.(*exec.Error); ok {
+		// zenity/osascript/etc were not found in path
+		return err, true
+	}
+	if err != nil && os.Getenv("DISPLAY") == "" {
+		// no display
+		return errors.New("no display"), true
+	}
+	return nil, false
+}
diff --git a/internal/zenutil/unescape_test.go b/internal/zenutil/unescape_test.go
index 12a00f7..3b32290 100644
--- a/internal/zenutil/unescape_test.go
+++ b/internal/zenutil/unescape_test.go
@@ -10,6 +10,11 @@ func TestUnescape(t *testing.T) {
 		{`abc`, "abc"},
 		{`ab\c`, "abc"},
 		{`a\bc`, "a\bc"},
+		{`abc\f`, "abc\f"},
+		{`abc\n`, "abc\n"},
+		{`abc\r`, "abc\r"},
+		{`abc\t`, "abc\t"},
+		{`abc\v`, "abc\v"},
 		{`a\1c`, "a\001c"},
 		{`a\12c`, "a\012c"},
 		{`a\123c`, "a\123c"},
diff --git a/pwd_test.go b/pwd_test.go
index c385984..08d3d4e 100644
--- a/pwd_test.go
+++ b/pwd_test.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"os"
+	"runtime"
 	"testing"
 	"time"
 
@@ -16,6 +17,13 @@ func ExamplePassword() {
 	// Output:
 }
 
+func ExamplePassword_username() {
+	zenity.Password(
+		zenity.Title("Type your username and password"),
+		zenity.Username())
+	// Output:
+}
+
 func TestPassword_timeout(t *testing.T) {
 	defer goleak.VerifyNone(t)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second/10)
@@ -43,3 +51,23 @@ func TestPassword_cancel(t *testing.T) {
 		t.Error("was not canceled:", err)
 	}
 }
+
+func TestPassword_username(t *testing.T) {
+	defer goleak.VerifyNone(t)
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	_, _, err := zenity.Password(zenity.Context(ctx), zenity.Username())
+	if err, skip := skip(err); skip {
+		t.Skip("skipping:", err)
+	}
+	if runtime.GOOS == "windows" || runtime.GOOS == "darwin" {
+		if !errors.Is(err, zenity.ErrUnsupported) {
+			t.Error("was not unsupported:", err)
+		}
+	} else {
+		if !errors.Is(err, context.Canceled) {
+			t.Error("was not canceled:", err)
+		}
+	}
+}