diff --git a/internal/pkg/printer/merge_test.go b/internal/pkg/printer/merge_test.go
new file mode 100644
index 00000000..94b6136f
--- /dev/null
+++ b/internal/pkg/printer/merge_test.go
@@ -0,0 +1,46 @@
+package printer
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/thecodingmachine/gotenberg/internal/pkg/xerror"
+	"github.com/thecodingmachine/gotenberg/internal/pkg/xlog"
+	"github.com/thecodingmachine/gotenberg/test/internalpkg/printertest"
+	"github.com/thecodingmachine/gotenberg/test/internalpkg/xerrortest"
+	"github.com/thecodingmachine/gotenberg/test/internalpkg/xlogtest"
+)
+
+func TestMergePrinter(t *testing.T) {
+	var (
+		logger xlog.Logger = xlogtest.DebugLogger()
+		fpaths []string    = printertest.MergeFpaths(t)
+		opts   MergePrinterOptions
+		dest   string
+		p      Printer
+		err    error
+	)
+	// default options.
+	opts = MergePrinterOptions{
+		WaitTimeout: 10.0,
+	}
+	p = NewMergePrinter(logger, fpaths, opts)
+	dest = printertest.GenerateDestination()
+	err = p.Print(dest)
+	assert.Nil(t, err)
+	err = os.RemoveAll(dest)
+	assert.Nil(t, err)
+	// should not be OK as context.Context
+	// should timeout.
+	opts = MergePrinterOptions{
+		WaitTimeout: 0.1,
+	}
+	p = NewMergePrinter(logger, fpaths, opts)
+	dest = printertest.GenerateDestination()
+	err = p.Print(dest)
+	xerrortest.AssertError(t, err)
+	assert.Equal(t, xerror.TimeoutCode, xerror.Code(err))
+	err = os.RemoveAll(dest)
+	assert.Nil(t, err)
+}
diff --git a/test/internalpkg/printertest/printertest.go b/test/internalpkg/printertest/printertest.go
index 9c909856..bfa2a92f 100644
--- a/test/internalpkg/printertest/printertest.go
+++ b/test/internalpkg/printertest/printertest.go
@@ -8,6 +8,11 @@ import (
 	"github.com/thecodingmachine/gotenberg/internal/pkg/xrand"
 )
 
+/*
+testdataDirectoryPath should be
+the absolute of the testdata INSIDE
+the Docker image.
+*/
 const testdataDirectoryPath string = "/gotenberg/tests/test/testdata"
 
 // GenerateDestination simply generates
@@ -16,6 +21,15 @@ func GenerateDestination() string {
 	return fmt.Sprintf("/tmp/%s.pdf", xrand.Get())
 }
 
+// MergeFpaths return the paths
+// of the PDF files used in tests.
+func MergeFpaths(t *testing.T) []string {
+	return []string{
+		fpath(t, "pdf", "gotenberg.pdf"),
+		fpath(t, "pdf", "gotenberg_bis.pdf"),
+	}
+}
+
 // OfficeFpaths return the paths
 // of the Office documents used in tests.
 func OfficeFpaths(t *testing.T) []string {