diff --git a/cbconvert_test.go b/cbconvert_test.go
new file mode 100644
index 0000000..bc4a9c4
--- /dev/null
+++ b/cbconvert_test.go
@@ -0,0 +1,117 @@
+package cbconvert
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestConvert(t *testing.T) {
+	tmpDir, err := os.MkdirTemp(os.TempDir(), "cbc")
+	if err != nil {
+		t.Error(err)
+	}
+
+	opts := Options{}
+	opts.OutDir = tmpDir
+	opts.Archive = "zip"
+	opts.Quality = 75
+	opts.Filter = 2
+
+	conv := New(opts)
+
+	conv.Initialize()
+	defer conv.Terminate()
+
+	files, err := conv.Files([]string{"testdata/test", "testdata"})
+	if err != nil {
+		t.Error(err)
+	}
+
+	for _, format := range []string{"jpeg", "png", "tiff", "bmp", "webp", "avif"} {
+		conv.Opts.Format = format
+
+		for _, file := range files {
+			conv.Opts.Suffix = fmt.Sprintf("_%s%s", format, filepath.Ext(file.Path))
+
+			err = conv.Convert(file.Path, file.Stat)
+			if err != nil {
+				t.Errorf("format %s: file %s: %v", format, file.Name, err)
+			}
+		}
+	}
+
+	err = os.RemoveAll(tmpDir)
+	if err != nil {
+		t.Error(err)
+	}
+}
+
+func TestCover(t *testing.T) {
+	tmpDir, err := os.MkdirTemp(os.TempDir(), "cbc")
+	if err != nil {
+		t.Error(err)
+	}
+
+	opts := Options{}
+	opts.OutDir = tmpDir
+	opts.Quality = 75
+	opts.Filter = 2
+	opts.Format = "jpeg"
+
+	conv := New(opts)
+
+	conv.Initialize()
+	defer conv.Terminate()
+
+	files, err := conv.Files([]string{"testdata/test.cbt"})
+	if err != nil {
+		t.Error(err)
+	}
+
+	for _, file := range files {
+		err = conv.Cover(file.Path, file.Stat)
+		if err != nil {
+			t.Error(err)
+		}
+	}
+
+	err = os.RemoveAll(tmpDir)
+	if err != nil {
+		t.Error(err)
+	}
+}
+
+func TestThumbnail(t *testing.T) {
+	tmpDir, err := os.MkdirTemp(os.TempDir(), "cbc")
+	if err != nil {
+		t.Error(err)
+	}
+
+	opts := Options{}
+	opts.OutDir = tmpDir
+	opts.Filter = 2
+
+	conv := New(opts)
+
+	conv.Initialize()
+	defer conv.Terminate()
+
+	files, err := conv.Files([]string{"testdata/test.pdf"})
+	if err != nil {
+		t.Error(err)
+	}
+
+	for _, file := range files {
+		err = conv.Thumbnail(file.Path, file.Stat)
+		if err != nil {
+			t.Error(err)
+		}
+	}
+
+	err = os.RemoveAll(tmpDir)
+	if err != nil {
+		t.Error(err)
+	}
+}
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