diff --git a/go/qcow2/qcow2_test.go b/go/qcow2/qcow2_test.go
new file mode 100644
index 0000000..3b987c0
--- /dev/null
+++ b/go/qcow2/qcow2_test.go
@@ -0,0 +1,42 @@
+package qcow2
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"github.com/bazelbuild/rules_go/go/runfiles"
+)
+
+// TestGenerate exercises the Generate function for a variety of image sizes.
+func TestGenerate(t *testing.T) {
+	qemuImg, err := runfiles.Rlocation("qemu/qemu-img")
+	if err != nil {
+		t.Fatalf("Could not locate qemu-img: %v", err)
+	}
+
+	// Test all orders of magnitude from 1KiB to 1PiB.
+	for i := 20; i < 50; i++ {
+		t.Run(fmt.Sprintf("%d", 1<<i), func(t *testing.T) {
+			path := filepath.Join(t.TempDir(), "test.qcow2")
+
+			f, err := os.Create(path)
+			if err != nil {
+				t.Fatalf("Could not create test image file: %v", err)
+			}
+			if err := Generate(f, GenerateWithFileSize(1<<i)); err != nil {
+				t.Fatalf("Generate(%d bytes): %v", 1<<i, err)
+			}
+			if err := f.Close(); err != nil {
+				t.Fatalf("Close: %v", err)
+			}
+
+			cmd := exec.Command(qemuImg, "check", path)
+			if err := cmd.Run(); err != nil {
+				t.Fatalf("qemu-img check failed: %v", err)
+			}
+		})
+	}
+}